Effects of the coexistent impurities in the flue gas on CO<sub>2</sub> separation by membranes

WANG Xia; CHEN Hao; QU Ru-min; ZHANG Lin; YANG Lin-jun

Volume 43 Issue 01

Jan. 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(01): 100-107

WANG Xia, CHEN Hao, QU Ru-min, ZHANG Lin, YANG Lin-jun. Effects of the coexistent impurities in the flue gas on CO2 separation by membranes[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 100-107.

Citation:

WANG Xia, CHEN Hao, QU Ru-min, ZHANG Lin, YANG Lin-jun. Effects of the coexistent impurities in the flue gas on CO₂ separation by membranes[J]. Journal of Fuel Chemistry and Technology, 2015, 43(01): 100-107.

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Effects of the coexistent impurities in the flue gas on CO₂ separation by membranes

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Received Date: 2014-08-21
Rev Recd Date: 2014-09-24
Publish Date: 2015-01-30

Abstract

Abstract

The effects of coexistent gaseous components and fine particles on the CO₂ separation performance by polydimethylsiloxane/polysulfon (PDMS-PSF) flat sheet composite membranes were investigated in a simulated test-bed. It can be found that O₂ slightly inhibits the CO₂ separation performance, while the effect of SO₂ is negligible during the test time due to its low concentration in the flue gas. Water vapor promotes the CO₂ separation performance of PDMS-PSF composite membranes. The fly ash fine particles significantly deteriorate the CO₂ separation performance of PDMS-PSF membranes. Moreover, the CO₂ separation experiments by PDMS-PSF membranes with an actual flue gas from a desulfurization system of the coal-fired hot testing facility were conducted for 50 h. At the beginning, the CO₂ separation performance is slightly improved due to the combined effect of water vapor, O₂ and SO₂. With the extension of the test time, the impact of the fine particles deposited on the membrane surface increases, which gradually deteriorates the CO₂ separation performance of PDMS-PSF membrane. The CO₂/N₂ selectivity and the CO₂ permeation rate are decreased by 17.91% and 28.21%, respectively.
- CO₂ separation,
- PDMS-PSF composite membranes,
- coexistent gaseous components,
- fine particles,
- effects

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References(19)

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