水合物法分离CO2研究

混合气体在形成水合物时,水合物内的气体组分与气相内不同。CO2溶解度远高于N2、O2、H2等气体,因此水合物法可分离IGCC电厂转换合成气体和普通燃煤电厂烟气中的CO2。分析了气体组成、压力、温度、促进剂和多孔介质等因素对水合物法分离CO2的影响,给出了水合物法的工艺流程示意图,指出采用耦合技术降低操作压力和提高水合速度是今后改进和努力的方向。

STUDY ON HYDRATE PROCESS OF CO2 SEPARATION

When hydrate is formed by mixed gas,the gas composition in hydrate is different from the original gas.CO2 solubility is far bigger than N2,O2 and H2,so CO2 can be separated from the fuel gas in IGCC power plant and from the flue gas in PC power plant.In this paper the gas composition,pressure,temperature,promoter and pore materials are all analyzed from the influence to hydrate process of CO2 separation.Block flow diagram for hybrid hydrate-membrane process for CO2 recovery from IGCC fuel gas in presence of propane and for CO2 recovery from PC power plant flue gas in presence of THF are given.The future research em-phasis is lowering the operation pressure and enhancing the hydration rate.