The effect of temperature and pressure on n-heptane thermal cracking in regenerative cooling channel

doi:10.1016/j.combustflame.2018.04.036

	The effect of temperature and pressure on n-heptane thermal cracking in regenerative cooling channel
	Wu, Yong 1,2,4; Wang, Xiaohan 2,3; Song, Qianshi 2,4; Zhao, Luoguang 2,4; Su, Hang 2,4; Li, Haohan 2,4; Zeng, Xiaojun 2; Zhao, Daiqing 2,3; Xu, Jianzhong 1
刊名	COMBUSTION AND FLAME
	2018-08-01
卷号	194 页码:233-244
关键词	N-heptane pyrolysis Mechanism model Temperature Pressure
ISSN号	0010-2180
DOI	10.1016/j.combustflame.2018.04.036
通讯作者	Wang, Xiaohan(wangxh@ms.giec.ac.cn) ; Xu, Jianzhong(jzxu@iet.cn)
英文摘要	A thermal cracking experimental equipment of hydrocarbon fuels was built to study n-heptane pyrolysis and the effect of reaction conditions on this reaction process. The main species were measured and the change rules were analyzed on the range of temperature 873-1073 K and pressure 0.1-3.5 MPa. The total content of alkenes products was more than alkanes on this pyrolysis process. Compared to alkenes with same number carbons, the alkanes were more easy to decompose with temperature but more conducive to formation with pressure increasing. The content of ethylene is usually the most on above reaction conditions, but its descent is also the fastest with pressure increasing. A mechanism model of n-heptane pyrolysis (44 species and 166 reactions) was constructed and validated by experiments on different conditions. Compared with n-heptane oxidation detailed model of Version 3.1 from Lawrence Livermore National Laboratory (LLNL), the pyrolysis model present a better accordant with experiment results on a range of temperature and pressure. The kinetic reaction of n-heptane pyrolysis was analyzed with present pyrolysis model, and the pyrolysis reaction pathway for the main products was obtained. The formation of alkenes are mainly through C-C bond dissociation reaction, especiallyp-C dissociation, and small alkanes are formed mainly by radical metathetical or synthesis reaction, the former are endothermic reactions, but the latter are mostly exothermal reactions. The properties of some main reactions have a critical role for the change of product content with temperature and pressure, which is the main reason for the variety of products selectivity under different conditions, Pressure increased the pyrolysis residence time and mass density but it does not significantly affect the reaction energy, so its contribution to conversion rate of fuels thermal cracking is limited, although it changes the reaction pathway greatly. However, the temperature can increase obviously the reaction activation energy, even though the residence time and concentration is decreased, the conversion rate of n-heptane pyrolysis still increased. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
资助项目	Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences[XDA 21060102] ; Training Program of the Major Research Plan of the National Natural Science Foundation of China[91441127]
WOS关键词	SUPERCRITICAL CONDITIONS ; HYDROCARBON FUELS ; PYROLYSIS ; KINETICS ; OXIDATION ; DECOMPOSITION ; COMBUSTION ; MECHANISMS ; GASOLINE ; COKING
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000440118400019
资助机构	Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences ; Training Program of the Major Research Plan of the National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/23682]
专题	中国科学院广州能源研究所
通讯作者	Wang, Xiaohan; Xu, Jianzhong
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 10090, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yong,Wang, Xiaohan,Song, Qianshi,et al. The effect of temperature and pressure on n-heptane thermal cracking in regenerative cooling channel[J]. COMBUSTION AND FLAME,2018,194:233-244.
APA	Wu, Yong.,Wang, Xiaohan.,Song, Qianshi.,Zhao, Luoguang.,Su, Hang.,...&Xu, Jianzhong.(2018).The effect of temperature and pressure on n-heptane thermal cracking in regenerative cooling channel.COMBUSTION AND FLAME,194,233-244.
MLA	Wu, Yong,et al."The effect of temperature and pressure on n-heptane thermal cracking in regenerative cooling channel".COMBUSTION AND FLAME 194(2018):233-244.