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1

Indirect estimation of black carbon concentration in traffic site based on other pollutants : time variability analysis

Kamińska Joanna A., Kazak Jan K.

Journal of Water and Land Development

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2023

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no. 58

1--10

EN

Aiming to create more sustainable cities it is necessary to understand and manage different ecological factors which influence human health. One of such factors is black carbon (BC) in atmosphere, which currently is not commonly monitored by environmental monitoring systems. The aim of this research was to estimate by indirect approach the relation between eBC (equivalent of black carbon) concentration and other air pollutants in order to define approximate level of eBC in more efficient approach. The study was conducted in Wrocław (Poland) in October 2021, and combined data on eBC concentration (measured by microaethalometer), air quality (from national environmental monitoring system) and traffic (from municipal traffic management system). Quantile regression was used to assess the relationship between the concentrations of pollutants. The obtained results show that for rise 1 mg∙m-3 of carbon monoxide, eBC concentration rise between 4.2 and 8.0 μg∙m-3, depending on the period of a day. Precision of eBC concentration evaluation is influenced by sun light which results in higher precision of defining a scaling factor for night hours. Outcomes of this study constitute an added value to understanding of interconnections between different factors describing environmental conditions in cities and might be helpful for more effective environmental assessment of human habitats.

2

Changes in the Distribution of Air Pollutants (Carbon Monoxide) during the Control of the COVID-19 Pandemic in Jakarta, Surabaya, and Yogyakarta, Indonesia

Suhardono Sapta, Septiariva Iva Yenis, Rachmawati Siti, Matin Hashfi Hawali Abdul, Qona'ah Niswatul, Nirwana Bayu, Suryawan I. Wayan Koko, Sari Mega Mutiara, Prayogo Wisnu

Journal of Ecological Engineering

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2023

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Vol. 24, nr 4

151--162

EN

The condition of the Coronavirus Disease 2019 (COVID-19) pandemic in 2020 characterizing DKI Jakarta, Surabaya, and Yogyakarta Provinces which have a high population density in 2019, necessitates implementing Large-Scale Social Restrictions (LSSR) to control or break the chain of the spread of COVID-19. The LSSR policy that limits community activities, be it business activities, transportation, and the industrial sector, will impact social activities and the environment due to the reduced intensity of community activities. Therefore, this study aimed to determine changes in the carbon monoxide (CO) levels in Jakarta, Surabaya and Yogyakarta during the pre-pandemic and during the pandemic. The method used is the tropospheric CO concentration extracted from the Sentinel-5P satellite data. The CO data were retrieved and calculated using Google Earth Engine. The COVID-19 pandemic reduced CO level by 19.7%, 14.9%, and 21%, respectively. The paired t-test shows no significant difference from before the COVID-19 pandemic, with a significance of 0.05. The highest pre-pandemic average and total CO concentration levels were 0.042 and 1.0198 mol/m2 in Yogyakarta, respectively, whereas the lowest during the pandemic were 0.02845 and 0.6828 mol/m2 in Surabaya. Overall, the three cities have a weak relationship between CO level and precipitation as well as temperatures and CO level.

3

The Investigation of Carbon Monoxide Concentration at Selected Areas in the Federal Territory of Kuala Lumpur, Malaysia

Nayan Nasir, Hashim Mohmadisa, Saleh Yazid, Mahat Hanifah, Said Zahid Mat, Suhaili Samsudin, Luyan Madeline Henry

Ecological Engineering & Environmental Technology

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2023

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Vol. 24, iss. 3

221--232

EN

This study aims to study carbon monoxide (CO) concentration in the Federal Territory of Kuala Lumpur (FTKL), which involves primary data through field studies with a quantitative approach. The CO sampling method involves 12 observation stations covering six main zones for eight days. Data are collected twice a day at night and day between 01:00 - 04:00 AM and 1:00 - 4:00 PM. The duration of the sampling is 30 minutes for one sample. Sampling time may vary for stations but still within the stipulated time. The instrument to measure CO is the Model Carbon Monoxide meter AS700A. The Analysis is descriptive. The findings show that the lowest value at night is stations 3 and 10, with an average concentration value of 5 parts per million (ppm). Simultaneously, the highest CO value in the afternoon is at station 1 and station 4, with a concentration of 12 ppm. The overall average at each station is high, between 7 to 12 ppm. Most stations show readings exceeding the WHO’s standard (5 ppm/hour). However, CO’s concentration is considerably under control because it does not exceed the standard limits of NAAQS and DOE. Overall, CO concentrations are higher in the day than in the morning and on weekdays than on weekends. In conclusion, vehicle increase significantly contributes to increased CO concentrations in Kuala Lumpur. The proactive and effective measures to reduce the well-being of life to maintain human health and the environment.

4

Identification of places with deteriorated air quality in city of Žilina in relation to road transport

Šarkan Branislav, Loman Michal, Harantová Veronika

Archiwum Motoryzacji

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2023

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Vol. 102, nr 4

68--90

EN

The aim of the research is to identify places with deteriorated air quality in the selected city. After an analytical analysis of the data, it is possible to propose steps that can be used to actively contribute to the reduction of air pollution, especially due to road traffic. Places where deteriorated air quality was identified were identified on the basis of practical measurements. Given that the measurement route was designed in a built-up area of the city with a large number of pedestrians, the research was primarily focused on the identification of particulate matters (PM) and the concentration of carbon monoxide CO. The measurements were performed repeatedly on a pre-defined route. The measurements were carried out repeatedly during the morning rush hour when traffic was congested on the roads. Based on the processing and evaluation of the measurements, the sections where increased values of individual emissions were recorded were determined. In this way, it is possible to precisely identify places where air quality deteriorates. The research conclusions provide support for planning the optimization of air quality management policies towards the creation of sustainable cities. The research results present the possibilities of identifying problematic sections from the point of view of emissions production. Critical places with regard to the production of emissions can be connected to places where a permanently increased movement of vehicles is observed.

5

Lockdown effect on carbon monoxide concentration over Malaysia and Indonesia

Wan Kamarudin Wan Farahiyah, Irwan Zildawarni, Yaafar Mohd Rabani, Mat Amin Abd Rahman

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2022

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Vol. 31, No. 2

124--134

EN

An increase in Indonesian forest fires has infuriated Malaysia and Indonesia, where residents are inhaling smoke from peat and trees burned hundreds of miles away. The global COVID-19 lockdowns caused carbon monoxide (CO) emissions decreased seen over Malaysia and Indonesia regions. The main objective of this study is to investigate the CO distribution over Malaysia and Indonesia, within the period of January 2011 to December 2021. The impact of lockdown due to COVID-19 pandemic in 2020 and 2021 to CO concentration over Malaysia and Indonesia also was reviewed. This study utilizes MERRA-2 dataset provided by Giovanni interface. Five areas were found to be affected the most during the study period which is Kuala Lumpur, Jambi, Riau, Palembang, and Jakarta. Carbon monoxide concentration over the studied region exhibits a strong seasonality showing maximum value in dry season (July to October). September 2019 is found to have the highest trend of CO concentration affected Jambi region. As COVID-19 pandemic hit the whole world by end of year 2019, all the studied regions shown the decreasing trend after September 2019 and no high peak was observed during dry season (July to October) in 2020 and 2021. This is the combined effect of wetter dry season and an impact of lockdown implemented by government of Malaysia and Indonesia.

6

Idoor Air Quality with Particular Reference to Carbon Monoxide in the Room – A Pilot Study

Wiater Józefa, Gładyszewska-Fiedoruk Katarzyna

Journal of Ecological Engineering

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2022

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Vol. 23, nr 6

286--293

EN

Cigarette smoking are the most important reasons for increased carbon monoxide (CO) level in exhaled air. During the experiment, the CO level in indoor air in room was measured. Outdoor air quality data including atmospheric CO concentration, obtained from the own measured and data from the weather platform “freemeteo”. The measurements were carried out with the following variants: outside air, a room ventilated without people, nonsmokers, smokers and non-smoking people, smokers entering the room after smoking cigarettes, smokers who smoke in the room. As proven by measurements, carbon monoxide carried in the lungs by smokers has low concentrations and should not threaten the health of non-smoking users of rooms. The maximum concentration of carbon monoxide in the room was 1.4 ppm. In the external air, the average concentration of carbon monoxide was exactly as much as reported in the literature – 0.3 ppm.

7

Estimating emissions of harmful exhaust components by aircraft engines during the takeoff and landing cycle in airport space

Głowacki Paweł, Kalina Piotr, Kawalec Michal

Transactions on Aerospace Research

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2021

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Nr 2 (263)

63--70

EN

This articleexamines, based on the availableinformation and authors’ self-assessments, theenvironmental impact of turbine engine exhaust gases effect on the environment in the airport space during engines flight phases in the landing and takeoff cycle (LTO). The attention of aviation professionals is drawn to the fact that the amount of exhaust from the turbine engine is so significant that it may adversely change the ambient air at the airport. Consequently, increased emission level of carbon monoxide (CO), hydrocarbons (HC) during engine start-up and idle may pose a threat to the health of ramp staff. Also, high emission levels of nitrogen oxides (NOx) during takeoff, climb, cruise and descent is not without importance for the environment around the airport space. The paper gives CO2, HC, CO and NOx emission estimations based on ICAO Engine Emission Data Bank and the number of passenger operations at a medium-sized airport. It also provides calculation results of aircraft CO2, HC, CO and NOx emission using average times of aircraft maneuvers taken from aircraft Flight Data Recorder (FDR) in the LTO cycle various aircraft types at the airport. The latter, based on actual maneuvering times, lead to significantly reduced estimates of toxic exhaust gas emission volumes.

PL

W artykule przeanalizowano, w oparciu o dostępne informacje oraz ocenę autorów, wpływ gazów spalinowych z silników turbinowych na środowisko w przestrzeni wokół portu lotniczego podczas cyklu lądowania i startu (LTO) samolotów. Autorzy zwracają uwagę na fakt, że ilość spalin produkowanych przez silniki turbinowe jest na tyle znacząca, iż może niekorzystnie zmienić powietrze otaczające lotniska. Zwiększony poziom emisji tlenku węgla (CO) i węglowodorów (HC) podczas rozruchu silnika i na biegu jałowym może więc stanowić zagrożenie dla zdrowia pracowników obsługi naziemnej. Wysoki poziom emisji tlenków azotu (NOx) podczas startu, wznoszenia, schodzenia i kołowania również nie jest obojętny dla środowiska wokół lotniska. W artykule najpierw przedstawiono szacunki emisji CO2, HC, CO i NOx w oparciu o normy ICAO oraz liczbę operacji pasażerskich na lotnisku średniej wielkości. Następnie obliczono szacunkowe emisje CO2, HC, CO i NOx na podstawie danych pobranych z rejestratora lotu (FDR) podczas cyklu LTO różnych typów statków powietrznych na lotnisku. Te drugie obliczenia, oparte na rzeczywistych czasach manewrowych, wskazują na znacznie niższe szacunkowe emisje toksycznych gazów w obrębie portu lotniczego.

8

The Role of Smoke Detectors and Carbon Monoxide Detectors in the Fire Safety of Residential Buildings

Garlińska Urszula, Iwańska Marta, Śliwiński Robert, Florek Paweł

Safety & Fire Technology

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2021

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Vol. 57, iss. 1

114--133

EN

Purpose: The aim of this publication is to present the most important aspects of using smoke and carbon monoxide detectors intended for households or similar residential facilities as well as to indicate the advantages and disadvantages of the adopted system solutions that affect the number of detectors installed in this kind of buildings. The article aims to present the issues related to the Integrated Qualifications System (ZSK), i.e. newly developed market qualification, dedicated to installers and maintenance technicians of smoke and carbon monoxide detectors. Introduction: Smoke and carbon monoxide detectors for early detection of existing threats such as fires or escaping carbon monoxide are an important element of fire protection, dedicated primarily to owners of residential buildings. In many countries in the EU it is obligatory to install detectors in homes, whereas at the moment in Poland the only aspect regulated legally is the obligation of the manufacturer of these products to obtain a certificate. Since 2016, the ZSK has been operating in Poland, in which in 2019 the qualifications of installers/maintenance technicians of smoke and carbon monoxide detectors were distinguished. As a result, a person with a market qualification certificate is prepared for independent installation and maintenance of fire safety monitoring devices Methodology: As part of the research process, theoretical research was used, such as: analysis of literature and legal documents, synthesis, generalization, inference, comparison and analogy. As part of the research, documents from such countries as Poland, Great Britain (mainly England), Germany and France were analysed. The selection of individual countries was guided by the level of development of these systems in a given country and the availability of source documents Conclusions: The presented analysis of the requirements for the installation of the smoke and carbon monoxide detectors shows how different the approach is regarding the use of this type of devices. Depending on experiences and the administrative structure of a given country, a variety of regulations, whether legal or normative, can be discerned in the use of smoke and carbon monoxide detectors. ZSK is a well-described system of formal organization and classification of competences and offers the public services at the highest possible quality level. It is also a partial solution to the problem of installing detectors. However, it is necessary to regulate this issue from the legal level, as it was the case in other EU countries, where the installation of detectors in homes is obligatory. Such action will contribute to reducing the victims of fires or inhalation of toxic gases (carbon monoxide).

PL

Cel: Celem niniejszej publikacji jest przedstawienie najważniejszych aspektów stosowania czujek dymu i czujek tlenku węgla w prywatnych obiektach mieszkalnych, a także wskazanie zalet oraz wad przyjętych rozwiązań systemowych, które mają wpływ na liczbę detektorów montowanych w tego typu obiektach. Artykuł przedstawia również zagadnienia związane z Zintegrowanym Systemem Kwalifikacji (ZSK), tj. opracowanej kwalifikacji rynkowej, dedykowanej monterom i konserwatorom czujek dymu i czujek tlenku węgla. Wprowadzenie: Czujki dymu i czujki tlenku węgla to ważny element zabezpieczeń obiektów mieszkalnych. Dedykowane są one wszystkim właścicielom tych obiektów. W wielu krajach UE obligatoryjne jest montowanie czujek w domach, natomiast obecnie w Polsce wymagane jest jedynie ich certyfikowanie przez producenta. Od 2016 roku w Polsce funkcjonuje ZSK, w którym w roku 2019 wyodrębniono kwalifikacje dla monterów/konserwatorów czujek dymu i czujek tlenku węgla. Dzięki temu osoba posiadająca certyfikat kwalifikacji rynkowej jest przygotowana do samodzielnego montażu i konserwacji urządzeń monitorujących bezpieczeństwo pożarowe. Metodologia: W ramach procesu badawczego wykorzystano badania teoretyczne, takie jak: analiza literatury i dokumentów prawnych, synteza, uogólnianie, wnioskowanie, porównanie oraz analogia. Podczas badań dokonano analizy dokumentów z Polski, Wielkiej Brytanii (głównie Anglii), Niemiec i Francji. Przy ich doborze kierowano się poziomem rozwoju tych systemów w danym kraju oraz dostępnością dokumentów źródłowych. Wnioski: Przedstawiona analiza wymagań w zakresie obowiązku instalacji czujek dymu i czujek tlenku węgla pokazuje, jak różne jest podejście do ich stosowania w Polsce i w wybranych państwach europejskich. W zależności od doświadczeń oraz struktury administracyjnej danego kraju można dostrzec różnorodność przepisów prawnych czy normatywnych. ZSK jest opisanym systemem formalnego uporządkowania i klasyfikacji kompetencji i oferuje społeczeństwu usługi na możliwie najwyższym poziomie jakościowym. Niezbędne jest prawne uregulowanie tej kwestii, tak jak zostało to zrobione w innych krajach UE, gdzie instalacja czujek w domach jest obowiązkowa. Takie działanie przyczyni się do zredukowania ofiar pożarów lub zaczadzeń.

9

Semi-markovian approach to modelling air pollution

Bogalecka Magdalena

Safety and Reliability of Systems and Processes

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2021

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Summer Safety and Reliability Seminar 2021

31--44

EN

The air pollution assessment based on concentration’s changes of sulphur dioxide, carbon monoxide, nitrogen dioxide, ozone, benzene, and particulate matter is discussed in the chapter. The semi-Markov model of the environmental pollution process is introduced and its characteristics are determined. Next the proposed model is practically applied to examine and characterized air pollution in Gdańsk (Poland) as the exemplary industrial agglomeration. The main parameters and characteristics of the air pollution process are determined, such as concentration states of particular kinds of air pollutants, the limit values of transient probabilities and the mean total sojourn times staying at the air pollutants’ concentration states, for the fixed time interval.

10

Use of Metal Oxide-Modified Aerated Concrete for Cleaning Flue Gases from Carbon Monoxide

Ivanenko Olena, Gomelya Nikolai, Shabliy Tetyana, Trypolskyi Andrii, Nosachova Yuliia, Leleka Serhii, Trus Inna, Strizhak Peter

Journal of Ecological Engineering

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2021

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Vol. 22, nr 5

104--113

EN

The necessity of development of technical solutions that will allow to reduce carbon monoxide emissions of flue gases of industrial productions is substantiated. It is shown that the most rational design solution to the problem of carbon monoxide pollution during the firing of electrode blanks is the use of aerated concrete blocks with a catalyst, which can be quickly and conveniently located directly on the carbon material of the “green” electrodes pouring in the subfloor space of the firing furnaces. Modified by oxides of Mn4+, Fe2+, Fe3+, Cu2+, Cr3+ -catalysts based on aerated concrete were obtained. It is shown that in an empty reactor in the temperature range 200–400 °С the degree of conversion of carbon monoxide in the absence of a catalyst is zero. It is established that on the investigated catalysts based on aerated concrete 100% oxidation of carbon monoxide is achieved at a temperature of 390 °C in the case of using a mixture of catalyst powders 30% CuO + 70% MnO2, 40% CuO + 60% MnO2, 50% Fe (FexCr1-x) 2O4 + 50% MnO2; 50% Fe3O4 + 50 % MnO2. It is determined that the addition of ferrite catalyst powder in aerated concrete in a mixture or without manganese dioxide does not critically affect the mechanical properties of the products.

11

Development of a Catalyst for Flue Gas Purification from Carbon Monoxide of Multi-Chamber Furnaces for Baking Electrode Blanks

Ivanenko Olena, Trypolskyi Andrii, Gomelya Nikolai, Karvatskii Anton, Vahin Andrii, Didenko Olga, Konovalova Viktoria, Strizhak Peter

Journal of Ecological Engineering

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2021

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Vol. 22, nr 1

174--187

EN

The catalysts based on natural zeolite-clinoptilolite of Sokyrnytsia deposit modified with oxides of Mn4+, Fe2+, Fe3+, Cu2+, Cr3+ were synthesized. It was determined that 100% conversion of carbon monoxide was achieved at a temperature of 390°C when using the copper-manganese-oxide catalyst (30% CuO + 70% MnO2). It was shown that although the use of the manganese-oxide catalyst provided 92.8% of CO conversion degree, this catalyst had the most advantages for application compared to the other studied solids. The structural parameters of the manganese-oxide catalyst were determined using XRD, SEM, and nitrogen adsorption. The composition of the main elements of the catalyst samples was determined by micro-X-ray spectral analysis. It was shown that using the catalyst containers in chambers heated by flue gases in the fire channels of a multi-chamber furnace for baking of electrode blanks can be one of the constructive solutions to the problem of flue gas purification from carbon monoxide. The environmental safety of the copper-manganese-oxide catalyst application for the treatment of the flue gases of electrode production is justified by obtaining a catalyst from spent sorbents for purification of the manganese-containing natural water and its non-toxicity in the case of burial or storage in landfills.

12

CO level over the Republic of Croatia using SENTINEL-5P

Mamić Luka

GIS Odyssey Journal

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2021

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Vol. 1, no. 1

61--82

EN

This paper deals with the issue of air pollution in the territory of the Republic of Croatia by monitoring the level of one of the largest air pollutants – carbon monoxide. For the study area, total carbon monoxide levels observed by the TROPOMI SENTINEL- 5P mission device were taken and used to show carbon monoxide levels for the period from January to September 2020 for every fifteenth day of the month. The entire process of downloading, georeferencing and processing TROPOMI data is described. The analysis examines the relationship between carbon monoxide levels and urban areas, major roads, and altitude. Also, the time frame of observation covers the period of the most severe measures and lockdown due to the coronavirus pandemic and studies the impact of these measures on the level of carbon monoxide in the territory of the Republic of Croatia.

13

Gaseous Atmosphere During Gas Forming Tendency Measurements of the Selected Protective Coatings for Sand Moulds

Mocek J.

Archives of Foundry Engineering

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2021

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Vol. 21, iss. 3

11--18

EN

Protective coatings have direct contacts with hot and liquid alloys. As the result of such contacts gases are emitted from coatings. Gas forming is a tendency of the tested material to emit gases under a temperature influence. In order to assess the gas forming tendency either direct or indirect methods are applied. In the hereby work, the measurements of the gas forming tendency were performed under laboratory conditions, by means of the developed indirect method. The research material constituted samples of six selected protective coatings dissolved either in alcohol or in water. These coatings are applied in sand moulds and cores for making cast iron castings. The assessment of their gas forming tendency was presented in relation to temperatures and heating times. The occurrence and changes of oxygen and hydrogen contents in gases outflowing from the measuring flask during tests, were measured by means of gas sensors. The process of the carbon monoxide (CO) emission during tests was also assessed. The following gas sensors were installed in flow-through micro chambers: for oxygen - lambda probe, for hydrogen – pellistor, for carbon monoxide - sensor (dedicated for CO) FIGARO TGS 822 TF. The results of direct CO measurements were recalculated according to the algorithm supplied by the producer of this sensor.

14

Wentylacja bytowa garaży zamkniętych

Charkowska Anna

Rynek Instalacyjny

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2020

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Nr 4

62--68

PL

W artykule przedstawiono informacje dotyczące emisji zanieczyszczeń w garażach. Zamieszczono krajowe wymagania prawne dotyczące wentylacji bytowej garaży. Omówiono problemy dotyczące określania dopuszczalnych stężeń zanieczyszczeń powietrza w garażach. Przedstawiono sposób wyboru gazu wskaźnikowego do obliczenia wymaganego strumienia powietrza zewnętrznego w systemach wentylacji mechanicznej. Przytoczono niemiecką metodykę projektowania wentylacji bytowej (ogólnej) w garażach zamkniętych (VDI 2053-1:2014 [18]).

EN

The article presents informations on pollutant emissions in car parks. National legal requirements for car parks ventilation are provided. Problems related to determining permissible concentrations of air pollution in garages were discussed. The method of choosing the indicator gas for calculating the required outside air flow in mechanical ventilation systems is presented. The German methodology for designing general ventilation in closed car parks was quoted (VDI 2053-1: 2014 [18]).

15

Wpływ dodatku tlenku manganu do monolitycznego katalizatora platynowego na jego aktywność w utlenianiu monotlenku węgla i heksanu

Kucharczyk Barbara, Szczygieł Bogdan

Przemysł Chemiczny

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2020

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T. 99, nr 8

1173--1176

PL

Zbadano wpływ dodatku różnych ilości MnOx do monolitycznego katalizatora 0,15%Pt/Al₂O₃ na jego aktywność w utlenianiu CO i C₆H₁₄ MnOx nanoszono na warstwę pośrednią z Al₂O₃ lub nośnik pokrywano warstwą pośrednią zawierającą Al₂O₃ i 5–15% MnOx (liczony jako MnO). W katalizatorach 0,15%Pt/x%MnO/Al₂O₃ dyspersja Pt jest większa niż w katalizatorze 0,15%Pt/Al₂O₃, a mangan występuje jako Mn³⁺ i Mn²⁺. W przypadku zastosowania jako prekursora platyny Pt(NO₃)₄ aktywność katalizatorów zawierających MnOx w utlenianiu CO wzrasta ze wzrostem ilości MnOx naniesionego na Al₂O₃ w zakresie 0,06–0,39% mas. Używając jako prekursora H₂PtCl₆, uzyskano nieco mniejszą aktywność katalizatora w tym procesie. W utlenianiu heksanu największą aktywność wykazuje katalizator 0,15%Pt/0,26%MnOx/Al₂O₃, Wprowadzenie 5–15% mas. MnOx do Al₂O₃ obniża aktywność katalizatora Pt prawdopodobnie ze względu na zmniejszenie powierzchni właściwej warstwy pośredniej i zmniejszenie dostępności MnOx dla reakcji utleniania.

EN

MnOx was added to monolithic 0.15%Pt/Al₂O₃ catalyst studied for its activity in oxidn. of CO and C₆H₁₄ In the 0.15%Pt/x%MnO/Al₂O₃ catalysts, Pt dispersion was higher than in the 0.15%Pt/Al₂O₃ catalyst and both Mn³⁺ and Mn²⁺ ions were contained. Pt(NO₃)₄ was more efficient Pt precursor than H₂PtCl₆. The 0.15%Pt/0.26%MnOx/Al₂O₃ and 0.15%Pt/0.39%MnOx/Al₂O₃ catalysts exhibited the highest activities in the oxidn. of C₆H₁₄ and CO, resp.

16

Assessment of the Effect of Oxygen and Carbon Dioxide Concentrations on Gas Evolution During Heat Treatment of Thermoanthracite Carbon Material

Panov Yevgen, Gomelia Nikolai, Ivanenko Olena, Vahin Andrii, Leleka Serhii

Journal of Ecological Engineering

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2020

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Vol. 21, nr 2

139--149

EN

The processes of the interaction of carbon material (thermoanthracite pouring) with a gas-air mixture in a heat chamber were studied while heating to 800–850°C. The influence of temperature, oxygen and carbon dioxide concentration on the formation efficiency of carbon monoxide, carbon dioxide, hydrogen and methane was determined. A pilot plant was created, which provided heating of the carbon material at the indicated temperatures and regulating the supply of air and carbon dioxide. It was found that a noticeable oxidation of the carbon material in the heat chamber in the presence of oxygen or carbon dioxide occurs at the temperatures above 500°C. Significant concentrations of carbon monoxide were formed at temperatures of 600–800°C. It was shown that when using gas mixtures with an oxygen content of 7–21% minimum concentrations of carbon monoxide are formed at an oxygen content of 14%. At temperatures above 500°C, the formation of hydrogen and methane in gas flows was noted. The methane yield increased with the decreasing oxygen content.

17

Explosion Characteristics of Syngas from Gasification Process

Skrinsky Jan, Veres Jan, Cespiva Jakub, Ochodek Tadeas, Borovec Karel, Kolonicny Jan

Inżynieria Mineralna

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2020

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no. 1, vol. 2

195--200

EN

This paper describes a series of experiments performed to study the explosion parameters of syngas and its flammable component air mixtures. More than 100 pressure-time curves were recorded allowing to investigate the effects of three different gasification process conditions on the maximum explosion pressure and deflagration index. The representative syngas samples were prepared by thermochemical wood-pellets gasification. The experiments were performed in 20-L oil-heated spherical experimental arrangement for different concentrations at representative explosion initial temperature of 65°C. The experimental results were further compared with the explosion parameters of pure gases, namely hydrogen, methane, carbon monoxide and propane as the main flammable syngas components. The most important results are the maximum values of explosion pressure 7.2 ± 0.2 bar and deflagration index 170 ± 14 bar.m/s derived for start-up process conditions. These knowledge could be used to understand the effects of operating conditions to both the optimization design on syngas‐fueled applications and the safety protection strategies.

PL

Artykuł opisuje serię eksperymentów wykonanych w celu zbadania parametrów eksplozji gazu syntezowego oraz jego części palnych w mieszaninie z powietrzem. Więcej niż 100 krzywych w układzie ciśnienie-czas zostało zarejestrowanych pozwalając na zbadanie efektów trzech różnych warunków procesu zgazowania przy maksymalnym ciśnieniu eksplozji i wskaźniku deflagracji. Reprezentatywne próbki gazu syntezowego zostały przygotowane za pomocą zgazowania termochemicznego drewnianych granulek. Eksperymenty zostały wykonane w podgrzewanej olejem instalacji o kształcie sferycznym, której objętość wynosiła 20 Li wykorzystana została dla różnych stężeń oraz reprezentatywnej temperatury wstępnej na poziomie 65°C. Wyniki doświadczalne były następnie porównane z parametrami wybuchu czystych gazów, którymi były wodór, metan, tlenek węgla oraz propan, jako główne składniki gazu syntezowego. Najważniejszymi wynikami okazały się maksymalne wartości ciśnienia wynoszące 7,2 ± 0,2 barów oraz wskaźnik deflagracji na poziomie 170 ± 14 bar.m/s wyznaczony dla warunków startowych procesu. Informacje te mogą zostać wykorzystane w celu zrozumienia wpływu warunków operacyjnych dla optymalizacji zastosowań gazu syntezowego oraz strategii bezpieczeństwa związanego z jego wykorzystaniem.

18

Zagadnienia zatrucia tlenkiem węgla w krajowym budownictwie mieszkaniowym

Tałach Zbigniew, Czerski Grzegorz

Gaz, Woda i Technika Sanitarna

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2020

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Nr 5

22--25

PL

W Polsce co roku dochodzi do licznych przypadków zatrucia tlenkiem węgla, popularnie zwanego czadem, w budownictwie mieszkaniowym, które często kończą się tragicznie. Tlenek węgla powstaje w procesie niezupełnego spalania w urządzeniach grzewczych, zarówno opalanych gazem jak i paliwami stałymi. Najczęściej do wypadków zatruć czadem dochodzi w okresie jesienno-zimowym, w przypadku eksploatacji urządzeń grzewczych starszego typu i niewłaściwie działającej wentylacji grawitacyjnej. W artykule dokonano również przeglądu urządzeń powszechnie stosowanych w polskim budownictwie mieszkaniowym oraz przedstawiono wyniki badań Gazowych Grzejników Wody Przepływowej, które są często przyczyną zatruć tlenkiem węgla.

EN

In Poland, every year there are numerous cases of carbon monoxide poisoning, commonly known as chad, in housing, which often ends tragically. Carbon monoxide is formed in the millet of incomplete combustion in heating devices, both gas-fired and solid fuels. Most often, accidents with carbon monoxide poisoning occur in the autumn and winter, when older heating devices are used and gravity ventilation is not working properly. The article also reviews equipment commonly used in Polish residential construction and presents the results of research on Gas Flow Water Heaters, which are often the cause of carbon monoxide poisoning.

19

Heuristic Adaptive Control of Waste Gas Exhausting in Coke Making

Kačur Ján, Flegner Patrik, Durdán Milan, Laciak Marek

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 4

195--212

EN

Stabilization of the carbon monoxide (CO) in the waste gas is a common technical problem in many industrial plants. Stabilization can be performed continuously by regulating the fuel input or by regulating the exhaust gas draught. This paper proposes an adaptive control system for CO stabilization in waste gases based on a discrete controller. Heuristic adaptation of a discrete controller is based on continuous optimization of controller parameters. The advantage of this solution is that the control system does not need to perform the identification of the controlled system repeatedly. The parameters of the controller are dynamically optimized during the production process. By regulating the under-pressure, we change the amount of air supplied to the combustion chambers, which affects the combustion of gaseous fuel and also the concentration of CO in the waste flue gas. The control algorithm was verified for the combustion process in coke making. The proposed control achieved good stabilization quality when verified in simulation and also in an industry operation. The CO level at which the waste gas temperature was highest was selected as the setpoint. It was found that the stabilization of CO in waste gas to lower values is possible to achieve higher waste gas temperature and by that, higher temperatures in heating chambers.

20

Analysis of Data on Inhalation Poisoning using the Example of the Łuków County in the years 2015–2017

Dudziński Łukasz, Leszczyński Piotr Konrad

Safety & Fire Technology

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2019

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Vol. 53, iss. 1

174--187

EN

Aim: This article presents an original analysis of inhalation poisoning data using the example of the Łuków County in 2015-2017. The data was obtained from cases to which Emergency Medical Services were dispatched. Most of such exposures were accidental or caused by negligence. and could be avoided by applying appropriate prevention and safety rules. Introduction: Inhalation poisonings represent a small percentage of all poisonings. They are mainly associated with the heating season and carbon monoxide. The number of inhalation poisonings is much smaller than that of food poisonings, alcohol poisonings or drug overdoses but they also constitute a significant health risk for the public. Methodology: The study was based on an analysis of medical documentation of the emergency medical services station in Łuków. The research material was composed of the information contained in the dispatch documentation of EMS teams, i.e. ambulance call records and medical rescue records for events related to inhalation poisoning. The selection of events from all those that occurred during the audited period was made on the basis of: – information provided by the reporting person to the emergency number 999 or 112, – ICD-10 code in the medical emergency record, i.e. diagnosis of the cause of the illness or event. The analysed factors included age, sex, place of intoxication, seasonality and circadian variation of poisoning. The analysis also considered environmental conditions and the influence of stimulants. Results: In the analysed period there were 80 events related to inhalation poisoning. There were 89 people exposed in 80 events (65% – men, 35% – women). Over 90% were cases of accidental poisoning. 60% of the events occurred at 7 am – 7 pm and 40% of the events occurred at 7 pm – 7 am. Of all exposures, 90% were single poisonings and the remaining 10% were multiple. Most poisonings (78%) occurred at the place of residence. Among all the victims, 56% were hospitalized in the county hospital in Łuków, 38% of patients remained at home (including due to death –20% or lack of symptoms requiring hospital treatment – 18%), and almost 6% required immediate specialist treatment. Most incidents related to inhalation poisoning in the Łuków County occurred in rural areas – 56 out of 80. Most inhalation poisonings were caused by CO.

PL

Cel: W poniższym artykule przedstawiono autorską analizę danych dotyczących zatruć wziewnych powiatu Łukowskiego w latach 2015–2017, do których dysponowane były zespoły ratownictwa medycznego. Wprowadzenie: Zatrucia wziewne stanowią niewielki odsetek wszystkich zatruć. Głównie kojarzy się je z okresem grzewczym i tlenkiem węgla. Ekspozycje te najczęściej są przypadkowe, dochodzi do nich również z zaniedbania. W większości można ich uniknąć, stosując odpowiednią profilaktykę i zasady bezpieczeństwa. Metodologia: Badanie miało charakter analizy dokumentacji medycznej Stacji Ratownictwa Medycznego w Łukowie. Materiał pracy stanowiły informacje zawarte w dokumentacji wyjazdowej zespołów ratownictwa medycznego tj. kart zlecenia wyjazdu oraz kart medycznych czynności ratunkowych w zdarzeniach związanych z zatruciem wziewnym. Selekcji zdarzeń spośród wszystkich, które wystąpiły w badanym okresie czasu dokonano na podstawie: – informacji podanej przez osobę zgłaszającą na numer ratunkowy 999 lub 112, – kodu ICD10 w karcie medycznych czynności ratunkowych tj. rozpoznania przyczyny choroby lub zdarzenia. Analizie poddano czynniki takie jak: wiek, płeć, miejsce ekspozycji, sezonowość i cykl dobowy zatruć. W analizie uwzględniono też warunki środowiskowe oraz udział używek. Wyniki: W 80 zdarzeniach ekspozycji poddanych zostało 89 osób: w tym 65% to mężczyźni, 35% – kobiety. Ponad 90% stanowiły zatrucia przypadkowe. 60% zdarzeń przypada na okres pomiędzy godzinami 7 a 19, a 40% – między 19 a 7. Wśród wszystkich ekspozycji 90% to zatrucia pojedyncze, pozostałe 10% – mnogie. Zdecydowana większość zatruć (78%) wydarzyła się w miejscu zamieszkania. Wśród wszystkich poszkodowanych 56% było hospitalizowanych w łukowskim szpitalu powiatowym, 38% osób pozostało w domu (w tym zgon 20% i brak objawów wymagających leczenia szpitalnego 18% ), a prawie 6% wymagała szybkiego leczenia specjalistycznego. Przeważająca liczba zdarzeń związanych z zatruciami wziewnymi występuje na terenach wiejskich: 56 z 80. Większość zatruć wziewnych powodowana jest przez CO.