正丁烷异构化制异丁烷反应热力学分析及试验研究

石油炼制与化工 ›› 2022, Vol. 53 ›› Issue (8): 68-72.

正丁烷异构化制异丁烷反应热力学分析及试验研究

刘洪全,于中伟,张秋平,王杰广,马爱增,孔令江,王子健

中国石化石油化工科学研究院

收稿日期:2021-12-13 修回日期:2022-02-07 出版日期:2022-08-12 发布日期:2022-07-30
通讯作者: 于中伟 E-mail:yuzw.ripp@sinopec.com
基金资助:
中国石化项目

THERMODYNAMIC ANALYSIS AND EXPERIMENTAL STUDY ON THE ISOMERIZATION OF n-BUTANE TO ISOBUTANE

Received:2021-12-13 Revised:2022-02-07 Online:2022-08-12 Published:2022-07-30
Contact: Yu ZhongWei E-mail:yuzw.ripp@sinopec.com

摘要/Abstract

摘要： 在分析正丁烷异构化制异丁烷反应特点的基础上，通过系统的热力学计算，获得了不同反应温度下目标反应的标准摩尔焓变、标准摩尔吉布斯自由能变、标准平衡常数及正丁烷平衡转化率，并以Pt/Al₂O₃-Cl为催化剂进行了正丁烷异构化反应试验研究。结果表明，正丁烷异构化属微放热反应，降低反应温度可提高正丁烷的平衡转化率；对于Pt/Al₂O₃-Cl催化正丁烷异构化反应，反应温度、反应压力、正丁烷进料空速和氢/烃摩尔比均对正丁烷转化率有较明显的影响，选择合适的反应温度和压力，并适当降低进料空速和氢/烃摩尔比，有利于提高正丁烷转化率；在优化的反应条件下，正丁烷的试验转化率与热力学平衡转化率基本吻合，验证了热力学分析结果的可靠性。

关键词: 正丁烷, 异构化, 异丁烷, 热力学, 平衡

Abstract: Based on the analysis of the reaction characteristic and thermodynamic behaviors of n-butane isomerization to isobutane, standard molar enthalpy change, standard molar Gibbs free energy change, standard equilibrium constant and equilibrium conversion of n-butane at different temperatures were obtained, and the n-butane isomerization over Pt/Al₂O₃-Cl catalyst was investigated. The results show that the isomerization of n-butane is an exothermic reaction, and the equilibrium conversion of n-butane can be increased by lowering the reaction temperature. In the n-butane isomerization catalyzed by Pt/Al₂O₃-Cl, the reaction temperature, reaction pressure, space velocity of n-butane and molar ratio of hydrogen to hydrocarbon (H₂/HC) have obvious effects on the conversion of n-butane. The n-butane conversion can be increased by selecting reaction temperature and pressure carefully and decreasing n-butane space velocity and H₂/HC molar ratio properly. Under optimum reaction conditions, the conversion of n-butane was in good agreement with that of thermodynamic equilibrium, which proved the reliability of thermodynamic analysis.

Key words: n-butane, isomerization, isobutane, thermodynamics, equilibrium

刘洪全于中伟张秋平王杰广马爱增孔令江王子健. 正丁烷异构化制异丁烷反应热力学分析及试验研究[J]. 石油炼制与化工, 2022, 53(8): 68-72.

Yu ZhongWei Zhang Qiuping Wang Jieguang Ma Aizeng Ling-jiang Kong. THERMODYNAMIC ANALYSIS AND EXPERIMENTAL STUDY ON THE ISOMERIZATION OF n-BUTANE TO ISOBUTANE[J]. PETROLEUM PROCESSING AND PETROCHEMICALS, 2022, 53(8): 68-72.

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