Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage

doi:10.1021/acs.energyfuels.8b02191

GIEC OpenIR

	Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage
	Huang, Yanqin1,2 ; Liu, Huacai 1,2; Yuan, Hongyou1,2 ; Zhuang, Xiuzheng 1,2,3; Yuan, Song 1,2,3; Yin, Xiuli1,2 ; Wu, Chuangzhi1,2
	2018-09-01
发表期刊	ENERGY & FUELS
ISSN	0887-0624
卷号	32 期号:9 页码:9605-9613
通讯作者	Yin, Xiuli(xlyin@ms.giec.ac.cn)
摘要	The serious K-induced ash problems during biomass thermal conversion are closely related to release and transformation behaviors of K. The aim of this work is to explore the contribution of different occurrence forms of K on K release and transformation pathways among various K species during devolatilization of agricultural straw. Devolatilization experiments under different heat treatment conditions (i.e., temperature, heating rate, and atmosphere) were carried out using a fixed-bed apparatus, and occurrence forms of K in the virgin sample and residual chars were quantitatively determined by sequential chemical fraction analysis combined with inductively coupled plasma optical emission spectrometry. Unstable watersoluble K and ion-exchangeable K in wheat straw accounted for about 89.3% of total K and were mainly responsible for the K release. Part of unstable K was directly decomposed into atomic K or sublimated, and a large fraction was first bound to the char matrix to form char K and then transformed into other forms or released depending upon specific conditions. The release and transformation of K were promoted under intensive conditions (i.e., high temperature and heating rate) and were strongly dependent upon atmospheres. In comparison to N-2 conditions, a CO2 atmosphere inhibited K release and facilitated the formation of HCl-soluble K, while an O-2 atmosphere promoted K release and enhanced the formation of insoluble K. Finally, the functional mechanism for K release and transformation among various K species during volatilization was proposed.
DOI	10.1021/acs.energyfuels.8b02191
关键词[WOS]	BED GASIFICATION CONDITIONS ; ALKALINE-EARTH METALS ; GAS-PHASE ; INORGANIC ELEMENTS ; WOOD COMBUSTION ; POTASSIUM ; PYROLYSIS ; BIOMASS ; CHLORINE ; COAL
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51661145022] ; National Natural Science Foundation of China[51776207] ; Natural Science Foundation of Guangdong Province[2017B030308002]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000445711700066
出版者	AMER CHEMICAL SOC
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/24076
专题	中国科学院广州能源研究所
通讯作者	Yin, Xiuli
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, 2 Nengyuan Rd, Guangzhou 510640, Guangdong, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Huang, Yanqin,Liu, Huacai,Yuan, Hongyou,et al. Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage[J]. ENERGY & FUELS,2018,32(9):9605-9613.
APA	Huang, Yanqin.,Liu, Huacai.,Yuan, Hongyou.,Zhuang, Xiuzheng.,Yuan, Song.,...&Wu, Chuangzhi.(2018).Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage.ENERGY & FUELS,32(9),9605-9613.
MLA	Huang, Yanqin,et al."Release and Transformation Pathways of Various K Species during Thermal Conversion of Agricultural Straw. Part 1: Devolatilization Stage".ENERGY & FUELS 32.9(2018):9605-9613.