含钴离聚体膜对CO_2的促进输送  

Facilitated CO_2 transport in an ionomer membrane with cobaltous ions

作　　者：张子勇[1] 饶华新[1] 余祥正[1] 

机构地区：[1]暨南大学化学系,广东广州510632

出　　处：《暨南大学学报（自然科学与医学版）》2005年第3期369-373,共5页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广东省自然科学基金(04010430)资助项目

摘　　要：　进一步研究了CO2、N2和CH4对乙丙三元橡胶(EPDM)磺酸钴(Co(Ⅱ)-S-EPDM)离聚体膜的渗透和分离性能.该离聚体膜显示出良好的CO2渗透性能,在20℃和0 05mPa压差下,CO2和CO2/N2分离系数αCO2/N2为14 68.PCO2随分别高达223Barrer和65 70,αCO2/CH4渗透系数PCO2CO2压差的降低而明显增大,显示出促进输送特征,这一行为即使在膜放置2个月之后并不消失,和αCO2/N2、αCO2/CH4可同渗透分离性能变化不大.N2和CH4无此性能,因此在气体压差较低时,PCO2时提高.由Arrhenius图计算的不同压差下的CO2渗透活化能显示,压差越小,渗透活化能越低,越有利于CO2的渗透.Permeability and selectivity of CO2, N2, and CH4 gases through a sulfonated ethylene - propene - diene terpolymer （EPDM） ionomer membrane containing Co （ Ⅱ ） were further investigated. The ionomer membrane under the conditions of 20℃ and 0.05mPa showed better permeaselectivities. The permeability coefficient of CO2 and CO2/N2 separation factor are 223 Barter and 65.70, respectively, while CO2/CH4 separation factor was only 14.68. An obvious increase in PCO2 with decreasing pressure difference exhibited a characteristic of facilitated CO2 transport, which do not disappear and almost unchanged after two month. There is no this behavior for N2 and CH4. Hence, PCO2 and αCO2/N2 and αCO2/CH4 Can be enhanced simultaneously. The data of the permeation active energies under various pressure difference counted by Arrhenius curves indicate that the lower pressure difference is, the smaller is active energy, the more benefit is it to CO2 permeation.

关 键 词：气体分离膜 乙丙三元橡胶 含钴离聚体 促进输送 二氧化碳 

分 类 号：TQ028.8[化学工程]