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

Abstract

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

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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