Sulfur K-edge XANES study of sulfur transformation during pyrolysis of four coals with different ranks

	Sulfur K-edge XANES study of sulfur transformation during pyrolysis of four coals with different ranks
	Wang, MJ; Liu LJ(刘利娟); Liu, LJ; Wang, JC; Chang, LP; Wang, H; Hu, YF
刊名	FUEL PROCESSING TECHNOLOGY
	2015
卷号	131 页码:262-269
关键词	High sulfur coal Pyrolysis Sulfur form Release Inter-conversion X-ray absorption spectroscopy
英文摘要	Sulfur transformations during pyrolysis of four high sulfur coals with different ranks are studied by measuring the release of S-containing gaseous products using online gas chromatography with a flame photometric detector and analyzing the sulfur forms in raw coals and chars using sulfur K-edge X-ray absorption spectroscopy. Results show that the sulfur forms in different coals are different and they behave differently during pyrolysis. More active disulfide and sulfide in lower rank coal can be decomposed and released as gas products below 500 degrees C; while a more complex thiophenic structure in the higher rank coal is difficult to decompose even at 1000 degrees C. Decomposition of pyrite in coal plays an important role in sulfur transformation during pyrolysis of coals rich in pyritic-sulfur. Pyrite begins to convert to FeS above 300 degrees C; while FeS will also react with nascent char or volatiles above 600 degrees C. The inter-conversions among sulfur species in solid play a dominant role in the transformation of sulfur forms above 600 degrees C. The minerals in coal are valuable in understanding conversions of sulfate and sulfide. The sulfur retention in solid form is correlated well with the releasing trend of H2S and COS during the coal pyrolysis. (C) 2014 Elsevier B.V. All rights reserved.
学科主题	Chemistry; Energy & Fuels; Engineering
类目[WOS]	Chemistry, Applied ; Energy & Fuels ; Engineering, Chemical
收录类别	SCI ; EI
WOS记录号	WOS:000348881700032
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228082]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang, MJ,Liu LJ,Liu, LJ,et al. Sulfur K-edge XANES study of sulfur transformation during pyrolysis of four coals with different ranks[J]. FUEL PROCESSING TECHNOLOGY,2015,131:262-269.
APA	Wang, MJ.,刘利娟.,Liu, LJ.,Wang, JC.,Chang, LP.,...&Hu, YF.(2015).Sulfur K-edge XANES study of sulfur transformation during pyrolysis of four coals with different ranks.FUEL PROCESSING TECHNOLOGY,131,262-269.
MLA	Wang, MJ,et al."Sulfur K-edge XANES study of sulfur transformation during pyrolysis of four coals with different ranks".FUEL PROCESSING TECHNOLOGY 131(2015):262-269.