PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 7

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Analysis of opportunities for performance improvement based on data from agricultural mono substrate biogas plant
Wrzesińska-Jędrusiak Edyta, Czarnecki Michał, Szufa Szymon, Maj Grzegorz, Čabalová Iveta, Grześkowiak Marianna
Journal of Water and Land Development
|
2024
|
no. 61
55--61
EN
Anaerobic digestion is a demanding process, due to the large number of process and environmental factors that affect it. Many years of research of the various parameters have made it possible to optimise the process to obtain the maximum amount of biogas and methane contained in it, and this provides energy and environmental benefits. The article deals extensively with the operation of agricultural biogas plants, using the example of a plant that faces numerous operational problems. In order to identify the negative effects on energy yield and the equipment operating in the system, the substrate was examined, the data on its operation analysed, and solutions were proposed that should be taken into account in the further operation of the biogas plant. The analysis showed a good biogas yield from beet pulp of 563 dm3∙kg-1 of TS (total solid) and an average methane yield of 58%. With the analysis presented, it was possible to identify some operational problems. The biogas yield study also highlighted some errors made at the plant design stage. The most important of these is the use of an inappropriate organic matter loading factor for the digester, which leads to acidification of the contents and degradation of the methanogenic microorganism cultures.
2
Content available The evaluation of energy from grapevine shoots used as biomass depending on the cultivar
Klimek Kamila E., Kapłan Magdalena, Maj Grzegorz
Journal of Water and Land Development
|
2023
|
no. 58
120--128
EN
The article examines the influence of physicochemical traits on yield depending on the variety and year of cultivation. Four common to Poland grape cultivars, i.e. ‘Regent’, ‘Rondo’, ‘Seyval Blanc’, and ‘Solaris’, were evaluated by analysing, among others, number of clusters per bush, their weight, number of berries, and the yield per hectare, number of woody shoots, weight of woody shoots, and the diameter of woody shoots. Energy and emission parameters were evaluated by conducting technical evaluation (lower heating value, ash content, volatile matters content, moisture content, fixed carbon) and elemental analysis (carbon, nitrogen, hydrogen, sulphur and oxygen contents) of one-year, two-year and three-year vine shoots. In addition, emission factors for CO, CO2, NOx, SO2 and dust were estimated. The study showed that there was no significant differences between years under study (2020, 2021 and 2022) and energy and emission parameters. It was observed that the highest LHV (lower heating value) occurred in the ‘Regent’ cultivar while the lowest level in the ‘Rondo’ cultivar. As regards energy-emission parameters, a significant influence of cultivar (‘Solaris’, ‘Rondo’, ‘Seyval Blanc’ and ‘Regent’) was shown on the parameters studied except for nitrogen content and NOx emission index. The interaction of year and cultivar showed no significant differences except for the moisture content.
3
Content available The analysis of energy potential in vine leaves of the ‘Regent’ cultivar as bio-waste depending on the year of cultivation and the type of rootstock used
Kapłan Magdalena, Maj Grzegorz, Klimek Kamila E.
Journal of Water and Land Development
|
2023
|
no. 58
171--177
EN
The study evaluated physicochemical properties of bio-waste as a potential biofuel in the form of leaves from ‘Regent’ grapevines grown on six different rootstocks and a control grown on its own roots for three years of cultivation. An elemental analysis was carried out, determining the content of carbon, hydrogen, nitrogen, and sulphur in the leaves tested. A technical analysis of the biofuel was also carried out to determine the content of moisture, volatile matter, and ash. The calorimetric method was used to determine the higher heating value for the material. Fixed carbon and oxygen carbon was calculated based on the elemental and technical analyses. The study showed that the type of rootstock and the year of cultivation influence the amount of leaves obtained from the cultivation area. Leaf entrustment per hectare ranged from 1,140,868.02 in rootstock 161-49 to 1,265,286.7 Mg∙ha-1 in rootstock SO4. Regardless of the year of the study, shrubs grafted on 125AA rootstock and the control had the highest combustion heat of 17.5 MJ∙kg-1 and 17.6 MJ∙kg-1 respectively, while 5BB rootstock had the lowest combustion heat (16.4 MJ∙kg-1). Statistical analysis showed no significant effect of test year on the elemental and technical parameters evaluated. It was observed that regardless of the evaluated parameter and the type of rootstock in most parameters, the values in 2022 were the highest, while in 2021 they were the lowest.
4
Content available remote O sposobach produkcji metanolu oraz wodoru z biogazu
Zając Grzegorz, Maj Grzegorz, Krzaczek Paweł, Nazimek Dobiesław
Przemysł Chemiczny
|
2022
|
T. 101, nr 8
553--558
PL
Przedstawiono różne technologiczne możliwości otrzymywania komponentów do syntezy ciekłych biopaliw, jak również otrzymywania metanu o czystości 99,9%. Ponadto opisano proces produkcji wodoru w reakcji reformingu parowego metanu oraz otrzymywania metanolu w procesie sztucznej fotosyntezy.
EN
A review, with 45 refs., of the use of biogas from CH₄ fermentation of organic matter for the production of MeOH. The process of direct MeOH synthesis from CH₄ and the method of processing CO₂ present in post-reaction gases to MeOH by means of artificial photosynthesis were discussed. The selective sepn. of CH₂ from biogas as well as steam reforming of biomethane in order to obtain biohydrogen were presented.
5
Content available remote Pozyskiwanie katalizatora Pt/Al2O3 do utleniania lotnych związków organicznych z procesu spalania biomasy
Maj Grzegorz, Krzaczek Paweł, Klimek Kamila, Piekarski Wiesław, Nazimek Dobiesław
Przemysł Chemiczny
|
2020
|
T. 99, nr 9
1395--1398
PL
Przedstawiono wyniki badań doświadczalnych procesu otrzymywania monolitycznego katalizatora Pt/Al2O3 do utleniania lotnych związków organicznych (LZO) z procesu spalania biomasy. Otrzymany katalizator utleniał etylen ze stałą szybkością reakcji 11,90 (po redukcji w atmosferze wodoru) i 15,33 1/s (bez redukcji). Redukcja katalizatora platynowego nie miała istotnego wpływu na jego aktywność. Istotną korzyścią było otrzymanie katalizatora, który nie wymaga wstępnej redukcji platyny w atmosferze wodoru.
EN
Pt was applied on the ceramic monolith support by double impregnation method. At first, Al2O3 was deposited from a Na aluminate soln., then Pt from aq. [H3O]2[PtCl6](H2O) x soln. and the resulting catalyst system was calcinated at 500°C for 3 h. The catalyst activity was tested in ethylene oxidn. at 500°C by using the catalyst with or without a pretreatment with H2. The pre-treated catalyst showed slightly higher activity but only in the range of high conversions.
6
Content available remote Katalityczne utlenianie lotnych związków organicznych
Maj Grzegorz, Krzaczek Paweł, Klimek Kamila, Piekarski Wiesław, Nazimek Dobiesław
Przemysł Chemiczny
|
2020
|
T. 99, nr 8
1169--1172
PL
Badano proces katalitycznego dopalania etylenu zawartego w powietrzu, stosując Al₂O₃, Pd/Al₂O₃, Ag/Al₂O₃ i V₂O₅/sipernat jako katalizatory. Najskuteczniejsze okazały się katalizatory Pd/Al₂O₃ (X = 100% w 650 K) oraz V₂O₅/sipernat (X = 80% w 973 K). Procesy utleniania na tych katalizatorach przebiegały wg różnych mechanizmów reakcji.
EN
Three Pd/Al₂O₃, Ag/Al₂O₃ and V₂O₅/sipernat catalysts were prepd. and used for oxidn. of ethylene as a model of volatile compds. Their efficiency was compared with ethylene oxidn. on Al₂O₃ at 1073–473 K. The Pd/Al₂O₃ and V₂O₅/sipernat catalysts were the most efficient.
7
Content available remote Ocena emisji amoniaku z fermy trzody chlewnej z wykorzystaniem sieci pomiarowej
Wlazło Łukasz, Ossowski Mateusz, Nowakowicz-Dębek Bożena, Krzaczek Paweł, Kułażyński Marek, Maj Grzegorz
Przemysł Chemiczny
|
2019
|
T. 98, nr 7
1075--1077
PL
Dokonano oceny wielkości emisji amoniaku z fermy trzody chlewnej (system ściołowy), używając analizatora wielogazowego Fresenius GAS 220 (GmbH, Niemcy). Otrzymane w badaniu stężenia amoniaku były najwyższe w godzinach porannych, jednak nie przekroczyły wartości zalecanych w normach. Najistotniejszym czynnikiem wpływającym na badane zjawisko był odpowiednio dobrany i prawidłowo funkcjonujący system wentylacji w tego typu obiektach.
EN
NH3 concns. were detd. 6 times a day for 7 days in a week. The measuring range of NH3 concn. was 0–1000 ppm. The highest NH3 concns. were found on the morning but did not exceed resp. stds. (20 ppm). The most relevant factor which affected the phenomenon was an adequately selected functioning ventilation system in the farm.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.