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1
Content available Utilization of Desulfurized Heavy Liquid Fuel Blends in Domestic Boiler
Al Aboushi Ahmad, Abdelhafez Eman, Hamdan Mohammad, Ajib Salman, Alsaqoor Sameh
Journal of Ecological Engineering
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2023
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Vol. 24, nr 7
225--233
EN
One way to cut down the consumption of diesel fuel in domestic heating in Jordan is to blend it with shale oil, which may be extracted from oil shale. This leads to a cut down in the national fuel bill in Jordan. Unfortunately, shale oil contains significant amounts of sulfur as impurities and upon burning sulfur oxides are emitted causing a negative environmental impact, and hence desulfurization of such fuel blends is essential. This may be achieved by adding activated carbon to the fluids. The process of removing sulfur from shale oil is crucial for safeguarding the environment, human well-being, and equipment, as well as meeting regulatory requirements and creating superior-quality goods. In this study, a domestic boiler was utilized to evaluate the degree of desulfurization process of blends of diesel and shale oil fuels upon their burning in a domestic boiler, to achieve this, blends of both fuels were prepared with varying amounts of shale oil (10%, 20%, 30%, and 40%) and various amounts of activated carbon were added to the prepared mixtures of diesel fuel and shale oil. The assessment of performance included examining the environmental impact, specifically by analyzing exhaust gases to measure the concentration of Sulfur Oxide (SO2). It was found that an increase in the concentration of shale oil in the mixture led to an increase in the concentration of SO2. However, adding more activated carbon to the mixture from the fuels resulted in a decrease in the SO2 concentration. The lowest SO2 concentration was observed when 1g of activated carbon was added per liter of the fuel mixture at a 20% concentration of shale oil, and 0.6g of activated carbon per liter of the fuel mixture at a 40% concentration of oil shale.
2
Content available Study on the Impact of Activators in the Presence of an Inhibitor on the Dynamics of Carbon Dioxide Absorption by Chlorophyll-Synthesizing Microalgae
Dyachok Vasil V., Mandryk Solomiia T., Huhlych Sergii I., Slyvka Maria M.
Journal of Ecological Engineering
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2020
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Vol. 21, nr 5
189--196
EN
The work demonstrates the suppression of the inhibiting effect of the carbon dioxide absorption process by chlorophyll-synthesizing Chlorella microalgae due to sulfur oxide SO2, activators of phosphorus oxide P2O5 and nitrogen oxides NxOy The research presents the experimental dependences of the dynamics of СО2 absorption by microalgae under the critical concentration of inhibitor SO2 in the presence of the P2O5 and NxOy activators. The authors devised the mathematic models of growth of the Chlorella microalgae population depending on the concentration of the phosphorus oxide and nitrogen oxides activators under a permanent concentration of the sulfur oxide inhibitor. The research determined an optimal total concentration of P2O5 activator in the presence of the SO2 inhibitor, as well as an optimal total concentration of the NO2 activator in the presence of the SO2 inhibitor.
3
Content available Związki odpowiedzialne za zanieczyszczenie powietrza
Kostrz M., Satora P.
Inżynieria Ekologiczna
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2017
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Vol. 18, nr 6
89--95
PL
Jakość powietrza w Polsce stanowi poważny problem dla społeczeństwa oraz środowiska. Według badań WHO Polska znajduje się na 14. miejscu w Europie jako kraj najbardziej zanieczyszczony pyłem zawieszonym PM10. Równie niebezpieczne dla zdrowia są ozon, WWO, dwutlenek azotu, tlenek siarki, tlenek węgla oraz metale ciężkie. Długotrwałe narażenie na podwyższone stężenia ozonu oraz dwutlenku azotu może doprowadzić do nieodwracalnych, rozległych zmian w płucach, obrzęku płuc, a nawet śmierci. Głównym przedstawicielem WWA jest benzo(a)piren (BaP), który jest kumulowany w organizmie i został określony przez IARC jako główny czynnik kancerogenny. Wysokie stężenie tlenku siarki w powietrzu może doprowadzić do uszkodzenia górnych dróg oddechowych, ponadto tlenki siarki przyczyniają się również do występowania kwaśnych deszczy oraz są składnikami smogu typu londyńskiego. Metale ciężkie będące zanieczyszczeniami powietrza, z uwagi na zdolność kumulowania się w organizmie, są jednym z najcięższych zagrożeń dla zdrowia ludzi.
EN
Air quality in Poland poses a serious threat for boththe society and the environment. According to the WHO research Poland is located on the 14th place as a country most contaminated by particulate matter (PM10). Equally health-threatening substances are ozone, PAH, nitrogen dioxide, sulfur oxide, carbon oxide and heavy metals. Long-lasting exposure to high concentrations of ozone and nitrogen dioxide may lead to many irreversible changes in lungs, pulmonary oedema and even death. The main PAH, which cumulates in the organism is benzopyrene. This substance has been described by the IARC as a the most cancerogenic factor. High concentration of sulfur oxide in the air may cause severe damage of upper respiratory tract, sulfur oxide contributes greatly also to the appearance of acid rain and is an ingredient of a London type smog. Heavy metals polluting the air are one of the most severe health threat for people, due to the ability to cumulate in the organism.
4
Content available Extraction of vanadium and potassium compounds from the spent vanadium catalyst from the metallurgical plant
Mazurek K.
Polish Journal of Chemical Technology
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2012
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Vol. 14, nr 2
49-53
EN
A spent vanadium catalyst, from the plant of metallurgical type, was leached in a sulfuric acid solution to recover vanadium and potassium compounds. The effect of time, temperature, concentration of acid, catalyst particle size and phase ratio was studied. Additionally the concentration of iron, copper, zinc, arsenic and lead compounds was determined. The flow sheet for the proposed process of spent vanadium catalyst leaching is presented.
5
Content available remote Badania nad opracowaniem optymalnych parametrów ługowania związków potasu ze zużytych katalizatorów stosowanych do utleniania tlenku siarki(IV)
Mazurek K.
Przemysł Chemiczny
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2009
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T. 88, nr 9
1033-1036
6
Content available The influence of leaching solution pH and addition of peroxide hydrogen on the recovery of some components from the used vanadium catalyst with urea solutions
Mazurek K., Trypuć M., Białowicz K., Drużyński S.
Polish Journal of Chemical Technology
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2008
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Vol. 10, nr 4
34-36
EN
The research was conducted to determine the influence of the pH of the leaching solutions and hydrogen peroxide addition on the efficiency of the recovery of vanadium, potassium and iron compounds from the used vanadium catalyst from the node of oxidation of sulfur dioxide to sulfur trioxide.
7
Content available Utilization of used contact masses from the oxidation state of sulfur(IV) oxide to suIfur(VI) oxide
Trypuć M., Mazurek K., Kiełkowska U., Drużyński S.
Polish Journal of Chemical Technology
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2007
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Vol. 9, nr 3
26-28
EN
The research was conducted to determine the influence of the urea concentration in the leaching solutions on the efficiency of recovery of vanadium and iron compounds from the used vanadium catalyst from the node of oxidation of sulfur dioxide to sulfur trioxide.
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