Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds

doi:10.1016/j.fuel.2020.118205

GIEC OpenIR

	Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds
	Huang, Yanqin1,2,3 ; Liu, Huacai 1,2; Yuan, Hongyou1,2 ; Lv, Xianchao 1,2,4; Xu, Bin 1,2; Li, Weizhen1,2 ; Uttaruean, Jenjira 5; Yin, Xiuli1,2 ; Wu, Chuangzhi1,2,4
	2020-10-01
发表期刊	FUEL
ISSN	0016-2361
卷号	277 页码:10
通讯作者	Yin, Xiuli(xlyin@ms.giec.ac.cn)
摘要	To better understand migration of K and Cl caused by interaction of KCl with organics, KCl-loaded model compounds (cellulose, xylan, lignin and pectin) were pyrolyzed within 300-800 degrees C using a fixed-bed apparatus. The amounts of different chemical occurrences of K and Cl in chars were quantitatively determined by sequential chemical fraction analysis combined with ICP-OES and IC. Morphologies and occurrence modes of Cl and K were further examined via XPS and SEM-EDS. Big differences in K and Cl migration were observed among four samples, and the distinction was closely related to types of organic functional groups. At temperature of below 500 V, a low proportion of K was released from four samples, while amounts of water-soluble K was transformed into organically-bounded form via different ion-exchange reaction mechanisms, thereby promoting Cl release. About 46.93-53.31% and 32.47-41.75% of organic-K, presumably formed by reaction of KCl and methoxyls, were detected in lignin and pectin chars, apparently higher than that in xylan and cellulose chars. At the same time, amounts (71.98-81.83%) of Cl was released from doped pectin, followed sequentially by lignin (35.12-52.34%), cellulose (18.56-35.68%), and xylan (10.67-18.65%). Part of released Cl was recaptured by active carbon sites, thereby forming organochlorine, and C-Cl generation followed a sequence of lignin > xylan > cellulose > pectin. As pyrolysis proceeded, cellulose exhibited highest K release due to decomposition of organic-K, while a considerable of char-K with high thermal stability still retained in other samples. Mechanism on migration of K and Cl caused by reaction of KCl with organics was proposed.
关键词	KCl Model biomass compounds Migration K and Cl Mechanism
DOI	10.1016/j.fuel.2020.118205
关键词[WOS]	THERMAL-CONVERSION ; RELEASE ; CHLORINE ; PYROLYSIS ; GASIFICATION ; POTASSIUM ; ALKALI ; SULFUR ; COAL ; TORREFACTION
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2018YFC1901204] ; National Natural Science Foundation of China[51776207] ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund, the CAS[DNL 180306] ; Natural Science Foundation of Guangdong Province, China[2019A1515011535] ; Science and Technology Program of Guangzhou, China[201804010153]
WOS研究方向	Energy & Fuels ; Engineering
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund, the CAS ; Natural Science Foundation of Guangdong Province, China ; Science and Technology Program of Guangzhou, China
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:000541255200085
出版者	ELSEVIER SCI LTD
引用统计	被引频次：16[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/344007/27359
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, Guangzhou 510640, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 5.Maejo Univ, Sch Renewable Energy, Chiang Mai 50290, Thailand
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. Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds[J]. FUEL,2020,277:10.
APA	Huang, Yanqin.,Liu, Huacai.,Yuan, Hongyou.,Lv, Xianchao.,Xu, Bin.,...&Wu, Chuangzhi.(2020).Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds.FUEL,277,10.
MLA	Huang, Yanqin,et al."Migration and speciation transformation of K and Cl caused by interaction of KCl with organics during devolatilization of KCl-loaded model biomass compounds".FUEL 277(2020):10.