Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
Effects of KCl and CaCl2 on the evolution of anhydro sugars in reaction intermediates during cellulose fast pyrolysis | |
Leng, Erwei1,2; Costa, Mario2; Gong, Xun1; Zheng, Anqing3; Liu, Shijun3; Xu, Minghou1 | |
2019-09-01 | |
发表期刊 | FUEL |
ISSN | 0016-2361 |
卷号 | 251页码:307-315 |
通讯作者 | Gong, Xun(gx@hust.edu.cn) ; Xu, Minghou(mhxu@hust.edu.cn) |
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. |
关键词 | Cellulose Fast pyrolysis Reaction intermediates Model compounds KCl CaCl2 |
DOI | 10.1016/j.fuel.2019.04.006 |
关键词[WOS] | LEUCAENA-LEUCOCEPHALA BARK ; BIOMASS PYROLYSIS ; GLUCOSE PYROLYSIS ; SLOW PYROLYSIS ; THERMAL-DECOMPOSITION ; MECHANISM ; POTASSIUM ; MODEL ; NACL ; ALPHA-BET(A) |
收录类别 | SCI |
语种 | 英语 |
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研究方向 | Energy & Fuels ; Engineering |
项目资助者 | National Natural Science Foundation of China ; Fundacao para a Ciencia e a Tecnologia through IDMEC, under LAETA |
WOS类目 | Energy & Fuels ; Engineering, Chemical |
WOS记录号 | WOS:000468734300028 |
出版者 | ELSEVIER SCI LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.giec.ac.cn/handle/344007/24976 |
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.Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Hubei, Peoples R China 2.Univ Lisbon, Inst Super Tecn, Mech Engn Dept, IDMEC, Lisbon, Portugal 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. |
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