正十烷高温热裂解及结焦前驱体形成研究
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- 英文论文题名：Coking Precursors Formation of n-Decane Pyrolysis at High Temperature
- 论文作者：王雨 ; 梁策 ; 张其翼 ; 李象远
- 英文论文作者：Yu Wang ; Ce Liang ; Qiyi Zhang ; Xiang-yuan Li ; College of Chemical Engineering ; Sichuan University
- 年：2016
- 作者机构：四川大学化学工程学院;
- 论文关键词：正十烷 ; 热裂解 ; 结焦前驱体
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十六分会：燃烧化学
- 语种：中文
- 分类号：TQ511
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十六分会 ; 燃烧化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：366k
- 原文格式：D
- 会议级别：全国
摘要
碳氢燃料在较高温度条件下的裂解反应,在生成燃烧性能优良的富能小分子产物的同时高温结焦问题是需要充分认识的。正十烷作为航空燃料重要组分之一,目前对其在高温高压条件下热裂解产生结焦前驱体(尤其是芳香族化合物)的过程尚不明确。本文以正十烷作为碳氢燃料模型化合物,在4MPa,570-750℃下进行热裂解实验。实验结果表明,正十烷的转化率从3.7%提高到98.3%,考察了正十烷裂解所得C1-C4的小分子烷烃和烯烃以及少量的芳香族化合物(苯、甲苯、茚满以及萘等)随着温度变化的规律。随着温度的升高,尤其是在680℃后,芳香族化合物产率急剧升高并伴随着C2-C4的小分子烯烃含量减少的现象,认为小分子烯烃对芳香族化合物的产生有重要作用。进一步的研究从正十烷的热裂解机理入手,通过灵敏度分析和反应路径分析识别结焦前驱体生成的关键反应步骤,从热力学、动力学角度认识苯、甲苯、茚满以及萘等结焦前驱体的形成路径和条件因素。
The study of n-decane pyrolysis under supercritical condition and the formation process of precursors was not explicitly till now. The experiments were conducted in a flow reactor at 570-750℃and 4 MPa, over which n-decane conversion raised from 3.7% to 98.3%. The products variation with temperature were investigated. The aromatic yields rise sharply at temperatures above 680℃, with the diminished outputs of C2-C4 1-alkenes, which play major roles in the formation of precursors in the supercritical environment. Based on the pyrolysis mechanism, sensitivity analysis and reaction paths were conducted to identify the crucial reactions of coking precursors generation, and exposed the coking precursors formation paths and conditions by thermodynamics and kinetics.
The study of n-decane pyrolysis under supercritical condition and the formation process of precursors was not explicitly till now. The experiments were conducted in a flow reactor at 570-750℃and 4 MPa, over which n-decane conversion raised from 3.7% to 98.3%. The products variation with temperature were investigated. The aromatic yields rise sharply at temperatures above 680℃, with the diminished outputs of C2-C4 1-alkenes, which play major roles in the formation of precursors in the supercritical environment. Based on the pyrolysis mechanism, sensitivity analysis and reaction paths were conducted to identify the crucial reactions of coking precursors generation, and exposed the coking precursors formation paths and conditions by thermodynamics and kinetics.
引文
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[2]Kalpathy S.P.;Bagley S.P.;Wornat M.J.Ind.Eng.Chem.Res.2015,54,7014-7027.
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