气候变化领域集成服务门户(CCPortal): A mechanistic model of fast pyrolysis of hemicellulose

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DOI	10.1039/c7ee03208k
	A mechanistic model of fast pyrolysis of hemicellulose
	Zhou X.; Li W.; Mabon R.; Broadbelt L.J.
发表日期	2018
ISSN	17545692
起始页码	1240
结束页码	1260
卷号	11 期号:5
英文摘要	Hemicellulose is one of the major components of lignocellulosic biomass, which is an abundant source of renewable carbon on the Earth and has potential for the production of renewable drop-in transportation fuels and multiple commodity chemicals. In this work, a structure for hemicellulose extracted from corn stover was proposed to capture the experimentally characterized structural properties. A mechanistic model for hemicellulose pyrolysis was constructed based on the reaction family approach that we used for cellulose pyrolysis before. The model described the decomposition of hemicellulose chains, reactions of intermediates, and formation of a range of low molecular weight products (LMWPs) at the mechanistic level and specified rate constants for all the reactions in the network. Overall, 504 reactions of 114 species were included in the mechanistic model for fast pyrolysis of extracted hemicellulose. The mechanistic model closely matched experimental yields of various products with mass yield ≥1 wt%. Modeling results show that both the degree of polymerization and the polydispersity index of hemicellulose have an insignificant effect on the pyrolysis product distribution. Then, the mechanistic model of extracted hemicellulose is further extended to simulate the fast pyrolysis of native hemicellulose. Comparison of the model results showed that fast pyrolysis of native hemicellulose from corn stalk yielded more char, gaseous species, acetol, and much more acetic acid than that of extracted hemicellulose from corn stover, while yielding less 1,2-anhydroxylopyranose, 1,2;3,4-dianhydroxylopyranose and glycolaldehyde. © 2018 The Royal Society of Chemistry.
英文关键词	Pyrolysis; Rate constants; Reaction intermediates; Structural properties; Cellulose pyrolysis; Commodity chemicals; Degree of polymerization; Lignocellulosic biomass; Low molecular weight; Mechanistic modeling; Polydispersity indices; Transportation fuels; Cellulose; acetic acid; cellulose; chemical compound; chemical reaction; commodity; crop residue; decomposition; experimental study; modeling; numerical model; plant extract; polymerization; pyrolysis; Acetic Acid; Biomass; Cellulose; Corn; Degree Of Polymerization; Formation; Products; Pyrolysis; Zea mays
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190245
作者单位	Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, United States; Corporate Strategic Research, ExxonMobil Research and Engineering Company, 1545 US Route 22 East, Annandale, NJ 08801, United States
推荐引用方式 GB/T 7714	Zhou X.,Li W.,Mabon R.,et al. A mechanistic model of fast pyrolysis of hemicellulose[J],2018,11(5).
APA	Zhou X.,Li W.,Mabon R.,&Broadbelt L.J..(2018).A mechanistic model of fast pyrolysis of hemicellulose.Energy & Environmental Science,11(5).
MLA	Zhou X.,et al."A mechanistic model of fast pyrolysis of hemicellulose".Energy & Environmental Science 11.5(2018).