CAS OpenIR  > 多相复杂系统国家重点实验室
Pilot-scale study of volatilization behavior of Hg, Se, As, Cl, S during decoupled conversion of coa
Luo, Guangqian; Yu, Qiao; Ma, Jingjing; Zhang, Bi; Xiao, Li; Luo, Jun; Zhou, Tao; Wang, Yin; Xu, Minghou; Yao, Hong; Yao, H
2013-09
Source PublicationFUEL
Volume112Issue:112Pages:704-709
AbstractThe main aim of this paper is to determine the potential capability of removing volatile hazardous elements from coal before its further utilization by decoupled conversion of coal. The so called decoupled conversion isolates the combustion/gasification into two consecutive stages: pyrolysis followed by char combustion/gasification. Previous studies indicated that pyrolysis could transfer a part of the volatile hazardous elements of coal into gas form. The concentrated pollutants in the pyrolysis gas could be removed easier than those diluted ones in the gas product of direct combustion/gasification. However, the experiments were carried out in very small reactors, mostly in fixed beds, with batch feeding. The operating conditions, especially the reaction atmosphere and residence time, were quite different from the industry production process. Therefore, a 50 kg/h pilot scale facility combining a fluidized bed coal pyrolyzer and a fluidized bed char gasifier has been installed. A bituminous coal, a lignite or the binary mixture were continuously pyrolyzed together with circulating silica sands at different temperatures in the fluidized bed pyrolyzer and then gasified in the fluidized bed char gasifier. The volatilities of selected five hazardous volatile elements (mercury, arsenic, selenium, chlorine and sulfur) have been determined by analyzing each element concentration in the pyrolysis products. Pyrolysis in the large scaled fluidized bed has been proved to be a potential efficient method to remove volatile hazardous elements from coal before gasification. 600 degrees C is an optimal temperature for removing volatile hazardous elements from the two selected coals by flash pyrolysis, which also has been verified as a suitable temperature to get a satisfied tar yield. (C) 2013 Elsevier Ltd. All rights reserved.
KeywordVolatile Hazardous Element Fluidized Bed Pyrolysis Coal Decoupled Conversion
Indexed BySCI
Language英语
WOS IDWOS:000321735400097
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/1640
Collection多相复杂系统国家重点实验室
Corresponding AuthorYao, H
Recommended Citation
GB/T 7714
Luo, Guangqian,Yu, Qiao,Ma, Jingjing,et al. Pilot-scale study of volatilization behavior of Hg, Se, As, Cl, S during decoupled conversion of coa[J]. FUEL,2013,112(112):704-709.
APA Luo, Guangqian.,Yu, Qiao.,Ma, Jingjing.,Zhang, Bi.,Xiao, Li.,...&Yao, H.(2013).Pilot-scale study of volatilization behavior of Hg, Se, As, Cl, S during decoupled conversion of coa.FUEL,112(112),704-709.
MLA Luo, Guangqian,et al."Pilot-scale study of volatilization behavior of Hg, Se, As, Cl, S during decoupled conversion of coa".FUEL 112.112(2013):704-709.
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