液化石油气芳构化反应体系的热力学分析

Thermodynamic Analysis on the Aromatization of Liquefied Petroleum Gas

关键词:  液化石油气  芳构化  热力学分析

Key words:  LPG  aromatization  thermodynamic analysis

摘要:

利用液化石油气生产芳烃,对于提高液化石油气的利用率和经济效益均具有重要意义。开发液化石油气芳构化技术,首先利用热力学分析液化气芳构化反应体系的可能性。本文利用原子系数矩阵法确定了液化石油气芳构化反应体系的独立反应数和一组独立反应,利用热力学方法计算了该反应体系中各独立反应在不同条件下的吉布斯自由能变,平衡常数及体系在给定初始组成条件下的平衡组成,据此可判断各独立反应在指定条件下进行的方向及发生的可能性,分析结果可为反应器的设计及反应条件的选择提供指导。

Abstract:

There exists greatly significance to improve the utilization and economy efficiency by using liquefied petroleum gas (LPG) to produce aromatics. In the developing of technology of LPG aromatization,at first,it is necessary to complete the thermodynamic analysis on the complex reacting system of LPG aromatization. In this paper,the number of independent reactions and a set of independent reactions for LPG aromatization reacting system were determined by means of atomic coefficient matrix approach. Based on thermodynamic knowledge,the Gibbs free energy change,equilibrium constants of each independent reaction and the equilibrium compositions of the reacting system for specified initial composition,were calculated under the different conditions. Therefore,the possibility of each independent reaction could be judged under the specified conditions. The thermodynamic analysis results could provide a theoretical guidance for the design,operation of reactor as well as the determination of proper conditions for the LPG aromatization reacting system.