化学工程2018，Vol.46Issue(6)：37-41,5.DOI:10.3969/j.issn.1005-9954.2018.06.008
基于CPA状态方程计算天然气-甲醇-水气液相平衡
Phase equilibrium of natural gas/methanol/water mixtures by use of CPA EoS
摘要
Abstract
A Cubic-Plus-Association (CPA) Equation of Sate (EoS) was applied to calculate the vapor-liquid phase equilibrium of natural gas-methanol-water mixtures.The binary interaction parameters (BIP) for methane/water,ethane/water,hexane/water,and methanol/water binaries were fitted from corresponding experimental vapor-liquid equilibrium data.Moreover,a new general BIP formula for alkane-water binaries was correlated to the alkane's molecular mass.Finally,the vapor-liquid phase equilibrium of one natural gas-methanol-water mixture was calculated.The results show that,within 382-293 K and 5.86-34.34 MPa,the average relative deviation (ARD) between the experimental and calculated water contents in the vapor phase is 5.55％,and the ARD for the methanol contents is 8.09％.The achievement provides a practical way to calculate the vapor-liquid phase equilibrium of natural gas-methanol-water mixtures.Also,it can be applied to other mixtures involving the hydrogen-bond.关键词
天然气/甲醇/水/气液相平衡/CPA状态方程Key words
natural gas/methanol/water/vapor-liquid phase equilibrium/CPA equation of state (EoS)分类
化学化工引用本文复制引用
吴瑕,贾文龙,李长俊,罗强..基于CPA状态方程计算天然气-甲醇-水气液相平衡[J].化学工程,2018,46(6):37-41,5.基金项目
国家自然科学基金青年基金项目资助(51604233,51504206) （51604233,51504206）
国家自然科学基金面上项目资助(51474184) （51474184）
