Effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates during cellulose fast pyrolysis

doi:10.1016/j.fuel.2019.04.006

	Effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates during cellulose fast pyrolysis
	Leng, Erwei 1,2; Costa, Mario 1; Gong, Xun 2; Zheng, Anqing 3; Liu, Shijun 3; Xu, Minghou 2
刊名	FUEL
	2019-09-01
卷号	251 页码:307-315
关键词	Cellulose Fast pyrolysis Reaction intermediates Model compounds KCl CaCl2
ISSN号	0016-2361
DOI	10.1016/j.fuel.2019.04.006
通讯作者	Gong, Xun(gx@hust.edu.cn) ; Xu, Minghou(mhxu@hust.edu.cn)
英文摘要	Reaction intermediates mainly consisting of anhydro sugars are the crucial transitional stage connecting the cellulose feedstock and the three phases of products during pyrolysis. For the first time, the effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates were examined by using levoglucosan pyranose (LGA_Pyran), maltosan and cyclodextrin as model compounds. These compounds were subjected to fast pyrolysis on a Py-GC/MS, where dry samples were heated at a heating rate of 10 degrees C/s to 500 degrees C with a holding time of 20 s at 500 degrees C. The results indicated that KCl had a stronger inhibitory effect than CaCl2 on LGA_Pyran formation during cellulose fast pyrolysis. However, during the pyrolysis of the oligosaccharides, the catalytic effects of KCl were weakened by the low degree of polymerization and the lack of reducing ends, while the catalytic effects of CaCl2 were enhanced by a better distribution. This led to the reverse order of their effects on LGA_Pyran formation. Furthermore, much higher char yields from oligosaccharides under catalysis of CaCl2 than under the catalysis of KCl indicate the prominent influence of CaCl2 on the secondary reactions of reaction intermediates leading to secondary char.
资助项目	National Natural Science Foundation of China[51776085] ; National Natural Science Foundation of China[U1738104] ; National Natural Science Foundation of China[51661125011] ; Fundacao para a Ciencia e a Tecnologia through IDMEC, under LAETA[UID/EMS/50022/2013]
WOS关键词	LEUCAENA-LEUCOCEPHALA BARK ; BIOMASS PYROLYSIS ; GLUCOSE PYROLYSIS ; SLOW PYROLYSIS ; THERMAL-DECOMPOSITION ; MECHANISM ; POTASSIUM ; MODEL ; NACL ; ALPHA-BET(A)
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000468734300028
资助机构	National Natural Science Foundation of China ; Fundacao para a Ciencia e a Tecnologia through IDMEC, under LAETA
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/24975]
专题	中国科学院广州能源研究所
通讯作者	Gong, Xun; Xu, Minghou
作者单位	1.Univ Lisbon, Inst Super Tecn, Mech Engn Dept, IDMEC, Lisbon, Portugal 2.Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Leng, Erwei,Costa, Mario,Gong, Xun,et al. Effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates during cellulose fast pyrolysis[J]. FUEL,2019,251:307-315.
APA	Leng, Erwei,Costa, Mario,Gong, Xun,Zheng, Anqing,Liu, Shijun,&Xu, Minghou.(2019).Effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates during cellulose fast pyrolysis.FUEL,251,307-315.
MLA	Leng, Erwei,et al."Effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates during cellulose fast pyrolysis".FUEL 251(2019):307-315.