化学工程2012，Vol.40Issue(12)：36-37,2.DOI:10.3969/j.issn.1005-9954.2012.12.009
利用P-R方程估算纯组分真实气体的物性
Calculation of properties of pure real gas by P-R equation
张成 1张海荣1
作者信息
- 1. 华陆工程科技有限责任公司,陕西西安710065
- 折叠
摘要
Abstract
Focused on working out a solution to obtain the heat capacities at constant pressure Cp, based on Peng-Robinson equation of state (P-R equation) ,Newton iterative method was adopted to derive the mole volume of real gas,and the partial derivative of excess enthalpy with respect to temperature in P-R equation was calculated by using numerical method, thus obtaining the residual heat capacities at constant pressure of real gas. The Newton iterative method and partial derivative numerical solution were presented, and the solutions to the equations were also illustrated, which was applied to calculate Cp of some hydrocarbon compounds. The results show that the error of the calculation can satisfy the industrial requirement.关键词
热力学/状态方程/密度/定压热容Key words
thermodynamics/ equation of state/ density/ heat capacities at constant pressure分类
化学化工引用本文复制引用
张成,张海荣..利用P-R方程估算纯组分真实气体的物性[J].化学工程,2012,40(12):36-37,2.
