Hydrate capture CO_2 from shifted synthesis gas, flue gas and sour natural gas or biogas  

作　　者：Yanhong Wang Xuemei Lang Shuanshi Fan 

机构地区：[1]School of Chemistry and Chemical Engineering, Key Lab of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, South China University of Technology

出　　处：《Journal of Energy Chemistry》2013年第1期39-47,共9页能源化学（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.51176051 and 51106054);the National Basic Research Program of China(973 Program,No.2009CB219504-03)

摘　　要：CO2 capture by hydrate formation is a novel gas separation technology, by which CO2 is selectively engaged in the cages of hydrate and is separated with other gases, based on the differences of phase equilibrium for CO2 and other gases. However. rigorous temperature and pressure, high energy cost and industrialized hydration separator dragged the development of the hydrate based CO2 capture. In this paper, the key problems in CO2 capture from the different sources such as shifted synthesis gas, flue gas and sour natural gas or biogas were analyzed. For shifted synthesis gas and flue gas, its high energy consumption is the barrier, and for the sour natural gas or biogas （CO2/CH4 system）, the bottleneck is how to enhance the selectivity of CO2 hydration. For these gases, scale-up is the main difficulty. Also, this paper explored the possibility of separating different gases by selective hydrate formation and reviewed the progress of CO2 separation from shifted synthesis gas, flue gas and sour natural gas or biogas.CO2 capture by hydrate formation is a novel gas separation technology, by which CO2 is selectively engaged in the cages of hydrate and is separated with other gases, based on the differences of phase equilibrium for CO2 and other gases. However. rigorous temperature and pressure, high energy cost and industrialized hydration separator dragged the development of the hydrate based CO2 capture. In this paper, the key problems in CO2 capture from the different sources such as shifted synthesis gas, flue gas and sour natural gas or biogas were analyzed. For shifted synthesis gas and flue gas, its high energy consumption is the barrier, and for the sour natural gas or biogas （CO2/CH4 system）, the bottleneck is how to enhance the selectivity of CO2 hydration. For these gases, scale-up is the main difficulty. Also, this paper explored the possibility of separating different gases by selective hydrate formation and reviewed the progress of CO2 separation from shifted synthesis gas, flue gas and sour natural gas or biogas.

关 键 词：clathrate hydrate： C02 capture hydrogen shifted synthesis gas flue gas sour natural gas or biogas 

分 类 号：X701[环境科学与工程—环境工程]