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Study of oxidative desulphurization process of coal with different metamorphism degrees

燃料化学学报 2012年第2期40卷 129-137页

作者： S PYSHYEV V GUNKA Y PRYSIAZHNYI K SHEVCHUK A PATTEK-JANCZYK Institute of Chemistry and Chemical Technology Lviv Polytecnic National University St. Bandery 12 79013 Lviv Ukraine State Higher Vocational School in Tarnow Mickiewicza 8 33-100 Tarnow Poland

The oxidative desulphurization process of coal with different metamorphism degrees treated by an air-steam mixture has been *** has been shown that the pyrite present in black coal and anthracite is oxidized with the sulphur dioxide formation,and the process chemical mechanism does not depend on the quality of organic *** medium-metamorphized coal,capable of turning into a plastic state and cake in the range of investigated temperatures(350～450 ℃),is desulphurized with the greatest *** chemical mechanism dealing with the transformations of pyritic sulphur present in brown coal differs from similar processes taking place in black coal and anthracite,because FeS2 is converted with hydrogen sulphide formation at desulphurization.

关键词： oxidative desulphurization organic matrix pyrite metamorphism degree sulphur

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Lignite oxidative desulphurization Notice *** condition selection

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International Journal of Coal Science & Technology 2014年第1期1卷 62-69页

作者： Volodymyr Gunka Serhiy Pyshyev Institute of Chemistry and Chemical Technologies Lviv Polytecnic National University12 Bandery Str.Lviv 79013Ukraine

The process of lignite desulphurization via its treatment by an oxidant(air or air–steam mixture)has been *** research objective was useful determination of steam application in oxidative lignite *** has been proved that the water steam should be included in the oxidant composition to increase the hydrogen sulphide and combustible constituent content in the gases obtained during the processes under *** impact of factors which affect the reactions between solid(in our case–lignite)and gaseous reagent(oxidant,*** and or air–steam mixture)upon the research process has been investigated,if these reactions occur in the kinetic *** factors are linear rate of oxidant movement and coal grain *** values of oxidant movement linear rate and coal grain size,which the reaction transfer from pyrite sulphur and organic content of lignite from diffusion into kinetic area occurs by,have been *** these‘‘transfer’’conditions,the values of coefficients of oxidant mass transfer(β,m/s)as well as Sherwood criteria and boiling layer differences have been calculated.

关键词： Lignite oxidative desulphurization Pyrite Sulphur Hydrogen sulphide

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Mesopore-encaged V-Mn oxides:Progressive insertion approach triggering reconstructed active sites to enhance catalytic oxidative desulfuration

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Chinese Journal of Chemical Engineering 2022年第5期35卷 182-193页

作者： Fu Yang Ruyi Wang Shijian Zhou Xuyu Wang Yan Kong Shuying Gao School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China

The oxidative desulphurization(ODS)has become mainly popular by rapid catalytic oxidation of dibenzothiophene(DBT)relied on efficient heterogeneous catalyst,V-based catalytic active species were regarded as the potential option in the activity-preferred ODS ***,we reported the redispersion of vanadium oxide(VO_(χ))on the mesoporous silica modified with manganese oxide(Mn_(3)O_(4)) through one progressive insertion approach of metal oxides in the ***,mesoporeencaged vanadium-manganese oxides in the silica(VMn-MS)as the admirable output of excellent ODS catalyst was demonstrated compared to other monometal-modified counterparts and one-pot implanted *** characterization results revealed the post-implanted VO_(χ) species not only deposited around the pre-covered Mn_(3)O_(4) on the mesoporous surface but also inserted the surface layer of Mn_(3)O_(4) inducing the amorphous evolution of aggregated Mn_(3)O_(4) and the reconstruction of final active *** integrated approach made the reconstructed active species afford more exposed catalytic sites and the tailored surface redox cycles owing to the electronic communication of *** catalytic results demonstrated the excellent catalytic desulphurization efficiency(~100%)during 60 min at 80℃,which made the sulphur content reduce to 6 mg·L^(-1),remarkably superior to other comparative *** outstanding catalytic performance of VMn-MS catalyst can be ascribed to the synergistic effect of V-Mn dual metals rendering two different reaction pathways,which includes free-radical reaction and ring-forming reaction,where Mn site acted as active center triggering reactive free radicals which could be further optimized by surrounded V sites around Mn sites to promote the ODS process.

关键词： Nanomaterials Moleclar sieves oxidative desulphurization Radicals Synergetic effect Surface

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