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Effects of pressure and temperature on fixed-site
carrier membrane for CO 2 separation from natural
gas |
| Meng WANG,Dongxiao YANG,Zhi WANG,Jixiao WANG,Shichang WANG, |
| Chemical Engineering
Research Center, School of Chemical Engineering and Technology, Tianjin
University, Tianjin 300072, China；State Key Laboratory
of Chemical Engineering, Tianjin University, Tianjin 300072, China；Tianjin Key Laboratory
of Membrane Science and Desalination Technology, Tianjin University,
Tianjin 300072, China; |
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Abstract In this paper, the effect of testing temperature on the performance of fixed carrier membrane for CO2 separation were studied. The blend composite membranes were developed respectively with a blend of PEI-PVA (polyetheleneimine-polyvinyl alcohol) as separation layer and PS (polysulfone) ultrafiltration membranes as the substrates. The permselectivity of the membranes was measured with CO2/CH4 mixed gas. The effect of testing temperature on membrane separation performance was investigated. The results showed that both the permeances of CO2 and CH4 decreased with the increase of temperature, and the permeances decreased more quickly under low pressure than those under high pressure. At the feed pressure of 0.11MPa, the CO2/ CH4 selectivity of PEI-PVA/PS blend composite membrane reduced along with temperature increment. Under the feed pressure of 0.21MPa, as well as 1.11MPa, the selectivity decreased with the increase of temperature.
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Issue Date: 05 June 2010
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