Feasibility analysis and process simulation of CO_(2) dehydration using triethylene glycol for CO_(2) pipeline transportation

作     者：Shupanxiang Chen Guangying Chen Xiaolan Zhao Xiao Luo Hongxia Gao Wensheng Li Zhiwu Liang Shupanxiang Chen;Guangying Chen;Xiaolan Zhao;Xiao Luo;Hongxia Gao;Wensheng Li;Zhiwu Liang

作者机构：Joint International Center for CO_(2)Capture and Storage(iCCS)Provincial Hunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide EmissionsDepartment of Chemical EngineeringCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第12期

页      面：179-186页

核心收录：

学科分类：0711[理学-系统科学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (21536003, 21776065 and 21978075) the Natural Science Foundation of Hunan Province in China (2019JJ20006)。 

主　　题：Carbon dioxide Dehydration Simulation Triethylene glycol Process system 

摘      要：The operation of dehydration is very important in the process of gas transportation. This study aims to evaluate the application feasibility of CO_(2) dehydration using triethylene glycol, which is also called TEG for short. Aspen Plus software was used to simulate the dehydration process system of CO_(2) gas transportation using TEG dehydration. Parameter analysis and process improvement were carried out for the simulation of dehydration process. At first, a sensitivity analysis was conducted to analyze and optimize operating conditions of conventional CO_(2)-TEG dehydration process system. Subsequently, a recycle unit was introduced into the conventional CO_(2)-TEG dehydration process system, it can be found that the improved process system with the recycle unit has a higher CO_(2) recovery rate which was about 9.8% than the conventional one. Moreover, the improved process system showed excellent operation stability through the comparison of simulation results of several processes with various water contents in their feed gases. Although the energy consumption is increased by about 2%, the improved process was economically and technically feasible for the long-term availability of CO_(2) pipeline transportation. The simulated results showed that the improved CO_(2)-TEG process system has promising application prospects in CO_(2) dehydration of CO_(2) gas transportation with high stability.