DEVELOPMENT OF MESOPOROUS MEMBRANE MATERIALS FOR CO2 SEPARATION

Shih, Wei-Heng ; Zhao, Qiang ; Wang, Nanlin

National Energy Technology Laboratory (U.S.)

关键词: Membranes;    Aluminium Oxides;    Specific Surface Area;    Carbon Dioxide;    Phase Studies;   

DOI  :  10.2172/795760
RP-ID  :  FG26-00NT40823--01
RP-ID  :  FG26-00NT40823
RP-ID  :  795760

美国|英语

来源: UNT Digital Library

【 摘 要 】

Mesoporous and precipitated alumina were synthesized as the base material for CO{sub 2} adsorbent. The porous alumina is doped with Ba to enhance it CO{sub 2} affinity due to the basicity of Ba. it is shown by gas chromatograph (GC) that the addition of Ba enhances the separation CO{sub 2} from N{sub 2}. It was found that mesoporous alumina has larger specific surface area and better selectivity of CO{sub 2} than precipitated alumina. Ba improves the affinity of mesoporous alumina with CO{sub 2}. Phase may play an important role in selective adsorption of CO{sub 2}. It is speculated that mesoporous alumina is more reactive than precipitated alumina creating the xBaO {center_dot} Al{sub 2}O{sub 3} phase that may be more affinity to CO{sub 2} than N{sub 2}. On the other hand, the barium aluminate phase (Ba{sub 3}Al{sub 2}O{sub 6}) in the mesoporous sample does not help the adsorption of CO{sub 2}.