低温甲醇脱碳工艺热力学模型和过程模拟研究  

Thermodynamic model and process simulation for CO_2 removal with low temperature methanol

作　　者：肖珍平[1,2] 房鼎业[1] 应卫勇[1] 刘森[3] 陈健[3] 

机构地区：[1]华东理工大学大型工业反应器工程教育部工程研究中心化学工程联合国家重点实验室,上海200237 [2]中国石化集团宁波工程有限公司,浙江宁波315103 [3]清华大学化学工程联合国家重点实验室,北京100084

出　　处：《化学工程》2011年第7期74-77,共4页Chemical Engineering(China)

摘　　要：为了进行含高压气体和强极性物质的体系的低温甲醇脱碳工艺的模拟研究,建立相应的热力学模型。采用Soave-Redlich-Kwong(SRK)立方型状态方程,结合Huron-Vidal混合规则和非随机双流体Non-Random-Two-Liquid(NRTL)活度系数模型建立的热力学模型,从气体溶解度和气液平衡数据拟合获得了45对活度系数模型参数。用于低温甲醇洗脱碳工艺的过程模拟,低压和高压脱碳系统的模拟结果和实际工业数据符合很好。结果表明:采用热力学模型适合于同时含有H2,N2,CH4等非极性气体和CH3OH,H2O等强极性溶剂的低温甲醇脱碳工艺的过程模拟。For the study on simulation of CO2 capture processes with low temperature methanol,a thermodynamic model was established for a system with gases and strong polar components under high pressure.The Soave-Redlich-Kwong（SRK） cubic equation of state,Huron-Vidal mixing rule and Non-Random-Two-Liquid（NRTL） model for activity coefficients were used,and 45 pairs of parameters activity coefficient model were regressed with gas solubility and vapor-liquid equilibrium data.The simulation of the CO2 removal process was carried out.The results show that the thermodynamic method is valid for the process simulation with nonpolar gases such as H2,N2,CH4 and strong polar components such as CH3OH and H2O.

关 键 词：CO2捕集 气体吸收 低温甲醇 过程模拟 

分 类 号：TQ03[化学工程]