研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对...研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对 CO2 有很高的吸着量 ,而对其他测试气体仅有极微弱的吸着 ;对 CO2 /展开更多
A new polymeric membrane material-polyvinylamine (PVAm), which contains amino-groups facilitating the transport of CO 2 in the membrane, has been developed. A composite membrane used for CO 2 separation was made up by...A new polymeric membrane material-polyvinylamine (PVAm), which contains amino-groups facilitating the transport of CO 2 in the membrane, has been developed. A composite membrane used for CO 2 separation was made up by covering a PS basis membrane with the polyvinylamine. Sorption of CO 2 on the PVAm-PS composite membrane and the PS basis membrane was measured by using the volumetric method. The results show that the composite membrane has very high CO 2 sorption capacity, and this sorption capacity arises mainly from the PVAm layer. Temperature has much impact on the sorption, the sorption capacity drops sharply when temperature increases. The sorption mechanism is analyzed. It is deduced that there are physical and chemical interaction simultaneously between the composite membrane and CO 2. The membrane has no obvious sorption for CH 4, N 2 and H 2.展开更多
Membrane technology features inspiring excellence from numerous separation technologies for CO_(2) capture from post-combustion gas.Polyvinylamine(PVAm)-based facilitated transport membranes show significantly high se...Membrane technology features inspiring excellence from numerous separation technologies for CO_(2) capture from post-combustion gas.Polyvinylamine(PVAm)-based facilitated transport membranes show significantly high separation performance,which has been proven promising for industrial scale-up.However,commercialized PVAm with low molecular weight and excessive crystallinity is not available to prepare high-performance membranes.Herein,the synthesis process of PVAm was optimized by regulating polymerization and acidic hydrolytic conditions.The membranes based on PVAm with a molecular weight of 154 kDa and crystallinity of 11.37%display high CO_(2) permeance of 726 GPU and CO_(2)/N_(2) selectivity of 55 at a feed gas pressure of 0.50 MPa.Furthermore,we established a PVAm synthesis reactor with an annual PVAm solution(1%(mass))capacity of over 7000 kg and realized the scaled-up manufacture of both PVAm and composite membranes.展开更多
文摘研制成功一种对 CO2 具有促进传递作用的新型膜材料——聚乙烯胺。将此膜材料覆盖在聚砜膜表面制成复合膜。考察了复合膜的多层结构 ,复合膜对 CO2 、CH4、N2 等的吸着性能 ,及复合膜对 CO2 和 CH4的分离透过性能。结果表明 ,该复合膜对 CO2 有很高的吸着量 ,而对其他测试气体仅有极微弱的吸着 ;对 CO2 /
文摘A new polymeric membrane material-polyvinylamine (PVAm), which contains amino-groups facilitating the transport of CO 2 in the membrane, has been developed. A composite membrane used for CO 2 separation was made up by covering a PS basis membrane with the polyvinylamine. Sorption of CO 2 on the PVAm-PS composite membrane and the PS basis membrane was measured by using the volumetric method. The results show that the composite membrane has very high CO 2 sorption capacity, and this sorption capacity arises mainly from the PVAm layer. Temperature has much impact on the sorption, the sorption capacity drops sharply when temperature increases. The sorption mechanism is analyzed. It is deduced that there are physical and chemical interaction simultaneously between the composite membrane and CO 2. The membrane has no obvious sorption for CH 4, N 2 and H 2.
基金supported by the National Key Research and Development Program of China(2021YFB3801200)the National Natural Science Foundation of China(21938007)the Natural Science Foundation of Hebei Province(E2020402036)。
文摘Membrane technology features inspiring excellence from numerous separation technologies for CO_(2) capture from post-combustion gas.Polyvinylamine(PVAm)-based facilitated transport membranes show significantly high separation performance,which has been proven promising for industrial scale-up.However,commercialized PVAm with low molecular weight and excessive crystallinity is not available to prepare high-performance membranes.Herein,the synthesis process of PVAm was optimized by regulating polymerization and acidic hydrolytic conditions.The membranes based on PVAm with a molecular weight of 154 kDa and crystallinity of 11.37%display high CO_(2) permeance of 726 GPU and CO_(2)/N_(2) selectivity of 55 at a feed gas pressure of 0.50 MPa.Furthermore,we established a PVAm synthesis reactor with an annual PVAm solution(1%(mass))capacity of over 7000 kg and realized the scaled-up manufacture of both PVAm and composite membranes.
