Hydrate-based carbon dioxide capture from simulated integrated gasification combined cycle gas

被引：30

作者：

Xu, Chungang ^{[1
,2
,3
]}

Li, Xiaosen ^{[1
,2
]}

Cai, Jing ^{[1
,2
]}

Chen, Zhaoyang ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China

[2] Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Guangdong, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100083, Peoples R China

来源：

JOURNAL OF NATURAL GAS CHEMISTRY | 2012年 / 21卷 / 05期

基金：

中国国家自然科学基金;

关键词：

integrated gasification combined cycle (IGCC); gas hydrate; CO2; separation; H-2; purification; chemical absorption; CO2; SEPARATION; TECHNOLOGY;

D O I：

10.1016/S1003-9953(11)60397-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The equilibrium hydrate formation conditions for CO2/H-2 gas mixtures with different CO2 concentrations in 0.29 mol% TBAB aqueous solution are firstly measured. The results illustrate that the equilibrium hydrate formation pressure increases remarkably with the decrease of CO2 concentration in the gas mixture. Based on the phase equilibrium data, a three stages hydrate CO2 separation from integrated gasification combined cycle (IGCC) synthesis gas is investigated. Because the separation efficiency is quite low for the third hydrate separation, a hybrid CO2 separation process of two hydrate stages in conjunction with one chemical absorption process (absorption with MEA) is proposed and studied. The experimental results show H-2 concentration in the final residual gas released from the three stages hydrate CO2 separation process was approximately 95.0 mol% while that released from the hybrid CO2 separation process was approximately 99.4 mol%. Thus, the hybrid process is possible to be a promising technology for the industrial application in the future.

引用

页码：501 / 507

页数：7