Equilibrium Model and Performances of an Isopropanol鈥揂cetone鈥揌ydrogen Chemical Heat Pump with a Reactive Distillation Column

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• 作者：Min Xu ; Fang Xin ; Xunfeng Li ; Xiulan Huai ; Jiangfeng Guo ; Hui Liu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：March 20, 2013
• 年：2013
• 卷：52
• 期：11
• 页码：4040-4048
• 全文大小：473K
• 年卷期：v.52,no.11(March 20, 2013)
• ISSN：1520-5045

文摘

The intrinsic kinetic of the liquid-phase dehydrogenation of isopropanol over an amorphous Raney nickel catalyst was determined to be in the temperature range of 348 to 355 K. The kinetic model based on the Langmuir鈥揌inshelwood mechanism was adopted for experimental data fitting. An isopropanol鈥揳cetone鈥揾ydrogen chemical heat pump (IAH鈥揅HP) with a reactive distillation column was proposed in this paper. A mathematical model was established to evaluate the energy performance of the IAH鈥揅HP in terms of coefficient of performance (COP) and exergy efficiency, in which the obtained intrinsic kinetic was incorporated. The optimal feed location and operating pressure of the distillation column were determined first. Moreover, the thermodynamic performance of the IAH鈥揅HP improved with the increase of hydrogen鈥揳cetone molar ratio in the entrance of the exothermic reactor and the decrease of feed temperature of the distillation column. The operating performances between IAH鈥揅HP with and without reactive distillation part were compared. The results indicate that the COP and exergy efficiency of an IAH鈥揅HP system with reactive distillation part increase by 19.2% and 16.7% at most, respectively, compared with an IAH鈥揅HP without reactive distillation part.