期刊文献+

Quantitative interpretation to the chain mechanism of free radical reactions in cyclohexane pyrolysis 被引量:2

Quantitative interpretation to the chain mechanism of free radical reactions in cyclohexane pyrolysis
下载PDF
导出
摘要 Pyrolysis of cyclohexane was conducted with a plug flow tube reactor in the temperature range of 873-973 K. Based on the experimental data, the mechanism and kinetic model of cyclohexane pyrolysis reaction were proposed. The kinetic analysis shows that overall conversion of cyclohexane is a first order reaction, of which the rate constant increased from 0.0086 to 0.0225 to 0.0623 s-1 with the increase of temperature from 873 to 923 to 973 K, and the apparent activation energy was determined to be 155.0±1.0 kJ mol-1. The mechanism suggests that the cyclohexane is consumed by four processes:the homolysis of C-C bond (Path I), the homolysis of C-H bond (Path II) in reaction chain initia- tion, the H-abstraction of various radicals from the feed molecules in reaction chain propagation (Path III), and the process associated with coke formation (Path IV). The reaction path probability (RPP) ratio of XPath I:XPath II : XPath III : XPath IV was 0.5420:0.0045:0.3897:0.0638 at 873 K, and 0.4336 : 0.0061 : 0.4885 : 0.0718 at 973 K, respectively. Pyrolysis of cyclohexane was conducted with a plug flow tube reactor in the temperature range of 873-973 K. Based on the experimental data, the mechanism and kinetic model of cyclohexane pyrolysis reaction were proposed. The kinetic analysis shows that overall conversion of cyclohexane is a first order reaction, of which the rate constant increased from 0.0086 to 0.0225 to 0.0623 s-1 with the increase of temperature from 873 to 923 to 973 K, and the apparent activation energy was determined to be 155.0±1.0 kJ mol-1. The mechanism suggests that the cyclohexane is consumed by four processes:the homolysis of C-C bond (Path I), the homolysis of C-H bond (Path II) in reaction chain initia- tion, the H-abstraction of various radicals from the feed molecules in reaction chain propagation (Path III), and the process associated with coke formation (Path IV). The reaction path probability (RPP) ratio of XPath I:XPath II : XPath III : XPath IV was 0.5420:0.0045:0.3897:0.0638 at 873 K, and 0.4336 : 0.0061 : 0.4885 : 0.0718 at 973 K, respectively.
出处 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2011年第5期507-514,共8页 天然气化学杂志(英文版)
基金 supported by the Natural Science Foundation of Zhejiang Province(Y4110276)for financial support
关键词 CYCLOHEXANE PYROLYSIS free radicals chain mechanism kinetics SELECTIVITY cyclohexane pyrolysis free radicals chain mechanism kinetics selectivity
  • 相关文献

参考文献27

  • 1Ranzl E, Dente M, Pleruccl S, Blardl G. Ind Eng Chem Fundam, 1983, 22(1): 132.
  • 2Willems P A, Froment G E Ind Eng Chem Res, 1988, 27(11): 1966.
  • 3Savage P E. JAnalAppl Pyrolysis, 2000, 54(1-2): 109.
  • 4Watanabe M, Tsukagoshi M, Hirakoso H, Adschiri T, Arai K. AIChE J, 2000, 46(4): 843.
  • 5Khan R U, Bajohr S, Buchholz D, Reimert R, Minh H D, Nori- naga K, Janardhanan V M, Tischer S, Deutschmann O. J Anal Appl Pyrolysis, 2008, 81(2): 148.
  • 6Norinaga K, Deutschmann O. Ind Eng Chem Res, 2007, 46(11), 3547.
  • 7Ziegler I, Fournet R, Marquaire P M. J Anal Appl Pyrolysis. 2005, 73(2): 212.
  • 8Franz J A, Camaioni D M, Autrey T, Linehan J C, Alnajjar M S. JAnalAppl Pyrolysis, 2000, 54(1-2): 37.
  • 9Bounaceur R, Warth V, Marquaire P M, Scacchi G, Domine F, Dessort D, Pradier B, Brevart O. J Anal Appl Pyrolysis, 2002, 64(1): 103.
  • 10Schmich P H, Ederer H J, Ebert K H. Ind Eng Chem Res, 1992, 31(1): 29.

同被引文献75

引证文献2

二级引证文献44

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部