IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Effect of ash composition on the partitioning of arsenic during fluidized bed combustion
Zhou, Chuncai1,2; Liu, Guijian1,2; Xu, Zhongyu1; Sun, Hao1; Lam, Paul Kwan Sing3,4
2017-09-15
Source PublicationFUEL
Volume204Issue:2017Pages:91-97
SubtypeArticle
AbstractThe effect of the ash composition on the redistribution of arsenic in a coal combustion system was determined via both experimental laboratory simulations and thermodynamic equilibrium calculations. The experimental study was performed in a fluidized bed reactor in combustion temperature range of 500-1000 degrees C. The results show that arsenic redistribution is strongly related to the chemical composition of coal in a combustion system. The presence of Fe, Ca, Mg, Al, Na and K favour arsenic retention, while Si causes an opposing effect. The arsenic retention on ash compositions is both temperature and amount dependent. With rising combustion temperature, the arsenic retention efficiency of Fe, Ca and Mg oxides augmented up to a maximum and then decreased, while those of Al, Na and K compounds continued expanding in the range of 500-1000 degrees C. Chemical adsorption may be the primary mechanism for Fe, Ca, Mg, K and Na, while the adsorption of arsenic by Al may be ascribed to both physical and chemical adsorption. Arsenic is captured in ashes as a result of the formation of stable arsenate compounds arising from interactions with the inorganic matrix. The negative arsenic retention effect by silica is attributed to reactions with ash compositions which promote arsenic capture and the reduction of the solid arsenic compounds. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordArsenic Ash Composition Redistribution Chemical Adsorption Coal Combustion
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.fuel.2017.05.048
WOS KeywordFIRED POWER-PLANTS ; TRACE-ELEMENTS ; HEAVY-METALS ; COAL COMBUSTION ; FLY-ASH ; HIGH-TEMPERATURE ; BITUMINOUS COAL ; PULVERIZED COAL ; FLUE-GAS ; BEHAVIOR
Indexed BySCI
Language英语
WOS Research AreaEnergy & Fuels ; Engineering
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000403993400011
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5451
Collection黄土与第四纪地质国家重点实验室(2010~)
Affiliation1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
3.City Univ Hong Kong, State Key Lab Marine Pollut, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
4.City Univ Hong Kong, Dept Biol & Chem, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Chuncai,Liu, Guijian,Xu, Zhongyu,et al. Effect of ash composition on the partitioning of arsenic during fluidized bed combustion[J]. FUEL,2017,204(2017):91-97.
APA Zhou, Chuncai,Liu, Guijian,Xu, Zhongyu,Sun, Hao,&Lam, Paul Kwan Sing.(2017).Effect of ash composition on the partitioning of arsenic during fluidized bed combustion.FUEL,204(2017),91-97.
MLA Zhou, Chuncai,et al."Effect of ash composition on the partitioning of arsenic during fluidized bed combustion".FUEL 204.2017(2017):91-97.
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