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
发表期刊FUEL
卷号204期号:2017页码:91-97
文章类型Article
摘要The 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.
关键词Arsenic Ash Composition Redistribution Chemical Adsorption Coal Combustion
WOS标题词Science & Technology ; Technology
DOI10.1016/j.fuel.2017.05.048
关键词[WOS]FIRED POWER-PLANTS ; TRACE-ELEMENTS ; HEAVY-METALS ; COAL COMBUSTION ; FLY-ASH ; HIGH-TEMPERATURE ; BITUMINOUS COAL ; PULVERIZED COAL ; FLUE-GAS ; BEHAVIOR
收录类别SCI
语种英语
WOS研究方向Energy & Fuels ; Engineering
WOS类目Energy & Fuels ; Engineering, Chemical
WOS记录号WOS:000403993400011
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5451
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.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
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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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