Aspen Plus模拟高浓度H_(2)S/CO_(2)酸性气的选择性分离  

Aspen Plus simulation on selective separation of high concentration acid gas of H_(2)S and CO_(2)

作　　者：高帅涛 刘雪珂 张丽 刘芬 余江[1] 商剑锋 欧天雄 周政 陈平文 GAO Shuaitao;LIU Xueke;ZHANG Li;LIU Fen;YU Jiang;SHANG Jianfeng;OU Tianxiong;ZHOU Zheng;CHEN Pingwen(Research Group of Environmental Catalysis&Separation Process,College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Natural Gas Technology Management Department of Puguang Branch of Sinopec,Dazhou 635000,Sichuan,China;Natural Gas Treatment Plant of Zhongyuan Oilfield Branch of Sinopec,Puyang 457000,Henan,China)

机构地区：[1]北京化工大学化学工程学院,能源环境催化北京市重点试验室环境催化与分离过程研究组,北京100029 [2]中国石油化工有限公司普光分公司天然气技术管理部,四川达州635000 [3]中国石油化工有限公司中原油田分公司天然气处理厂,河南濮阳457000

出　　处：《化工学报》2021年第S01期413-420,共8页CIESC Journal

基　　金：国家科技部“十三五”重大专项项目(2016ZX05017-004)。

摘　　要：以煤制氢尾气中的高浓度酸性气体H_(2)S和CO_(2)为对象,以聚乙二醇二甲醚(NHD)为吸收剂,使用PC-SAFT状态方程拟合了酸性气体CO_(2)和H_(2)S在聚乙二醇二甲醚(NHD)溶剂中溶解参数,运用Aspen Plus流程模拟软件,构建两级吸收分离工艺,实现H_(2)S和CO_(2)的高效分离,H_(2)S浓度由30%提升至98.7%,CO2含量由55%提升至99.4%。由此,可以通过高效分离酸性气H_(2)S和CO_(2),并以提浓后再资源化利用的方式实现酸性气的污染控制。In this paper,polyethylene glycol dimethyl ether(NHD)was used as absorbent to treat the tail gas with high concentration of H_(2)S and CO_(2) from the coal to hydrogen process.The solubility parameters of H_(2)S and CO_(2) in NHD were fitted with the PC-SAFT equation of state.A two-stage absorptive separation process was built with the application of Aspen Plus process simulation software to realize the high effective separation of H_(2)S and CO_(2).The results show that the concentration of the separated H_(2)S and CO_(2) could be reached from 30%to 98.7%and 55%to 99.4%,respectively.Hence,the acid gas pollution control can be done by high efficient separation of H_(2)S and CO_(2) to get high single concentration for reuse and resource.

关 键 词：二氧化碳 硫化氢 吸收分离 Aspen模拟 聚乙二醇二甲醚 

分 类 号：TQ028.1[化学工程]