Dehydrogenation of Methylcyclohexane for On-Board Hydrogen Use: Initial Rate Kinetics Over 1.0 wt% Pt/γ-Al2O3

被引：0
作者：
Muhammad R. Usman
Rabya Aslam
机构：
[1] University of the Punjab,Institute of Chemical Engineering and Technology
来源：
Arabian Journal for Science and Engineering | 2014年 / 39卷
关键词：
Hydrogen economy; Methylcyclohexane; The MTH system; Dehydrogenation; Kinetic modeling;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Dehydrogenation of methylcyclohexane was studied over an in-house developed 1.0 wt% Pt/γ-Al2O3 catalyst. Experiments were conducted at various levels of temperature, pressure, space velocity, and feed composition. With increase in W/FA0, the methylcyclohexane conversion was observed to increase exponentially towards the equilibrium or maximum conversion. The function “exponential rise to maximum” is used to represent the experimental data and initial rates of the reaction were employed to analyze the data. A power law model and two Langmuir–Hinshelwood–Hougen–Watson (LHHW) models (single-site and dual-site) were applied to model the experimental data. Kinetic model equation based on dual-site LHHW was found the most appropriate with activation energy of the reaction system equal to 62.9 kJ/mol.
引用
收藏
页码：615 / 620
页数：5
相关论文
共 29 条
  • [1] Usman M.R.(2011)Catalytic dehydrogenation of methylcyclohexane over monometallic catalysts for on-board hydrogen storage, production, and utilization Energy Sour. A. 33 2231-2238
  • [2] Schildhauer T.H.(2001)The equilibrium constant for methylcyclohexane–toluene system J. Catal. 198 355-358
  • [3] Newson E.(1970)Mathematical modeling of chemical reactions Adv. Chem. Eng. 8 97-183
  • [4] Müller S.(1960)Kinetics of methylcyclohexane over Pt–Al2O3 J. Phys. Chem. 64 1559-1562
  • [5] Kittrell J.R.(1982)Fouling of a platinum reforming catalyst accompanying the dehydrogenation of methylcyclohexane J. Catal. 73 377-386
  • [6] Sinfelt J.H.(1979)Catalyst decay in the kinetics of methylcyclohexane dehydrogenation over Pt–NaY zeolite Can. J. Chem. Eng. 57 638-642
  • [7] Hurwitz H.(1986)Dehydrogenation of methylcyclohexane on a PtNaY catalyst: study of kinetics and deactivation Appl. Catal. 26 103-121
  • [8] Shulman R.A.(1970)Kinetics of methylcyclohexane dehydrogenation on sulfided commercial platinum/alumina and platinum-rhenium/alumina catalysts Ind. Eng. Chem. Fundam. 25 544-553
  • [9] Jossens L.W.(1989)Parameter estimation in the kinetic model of methylcyclohexane dehydrogenation on a Pt–Al2O3 catalyst by sequential experiment design Chem. Eng. J. 42 137-144
  • [10] Petersen E.E.(1996)Modelling and scaleup of the kinetics with deactivation of methylcyclohexane dehydrogenation for hydrogen energy storage Chem. Eng. Sci. 51 2891-2896
123