Repair of Pd-based composite membrane by polishing treatment |
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Authors: | Shin-Kun Ryi Jong-Soo Park Kyung-Ran Hwang Chun-Boo Lee Seong-Wook Lee |
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Affiliation: | aEnergy Materials Center, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon 305-343, South Korea;bDepartment of Chemical and Biological Engineering, Korea University, 5-Ga, Anam-Dong Sungbuk-Gu, Seoul 136-701, South Korea |
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Abstract: | In this study, the effect of module configuration on the performance of Pd-based membrane devices was examined using a Pd-Au composite membrane deposited on a porous nickel support. Hydrogen permeation flux, recovery, and CO2 enrichment were experimentally examined using two different modules. The module configuration that had a narrower space between the surface of the membrane and cover plate provided a large linear flow velocity of the gas mixture, which allowed for a reduction in the concentration polarization. The CO2 enrichment capacity of the membrane module with a space distance of 0.4 mm was 4 times higher than the module with a space distance of 2.5 mm. In regards to the process design, the membrane with an effective area of 16.6 cm2 could enrich 40% of the CO2 at a flow rate of 2000 ml min−1 up to 87% with a hydrogen recovery ratio of >90% at 673 K and a total feed pressure of 1600 kPa. |
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Keywords: | Hydrogen separation Membrane Pd Module Concentration polarization |
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