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Detailed Program
Paper Number : NA-P02
Time Frame : 12:00~13:30
Presentation Date : Friday, 28, November
Session Name : Nano-particles & Nano-structured Materials
Session Chair 1# : -
Session Chair 2# : -
Separation of H2/CO2 mixed gas through porous alumina compact
Mr. Kota Gotanda
Kagoshima universitiy
In our previous paper[1], a relatively high flux of permeated H2 gas was measured in a porous Al2O3 compact with average pore size 60 nm at near zero MPa of the pressure gradient between inlet and outlet gases. However, the permeation of N2 and CO2 gases occurred above a critical pressure gradient. In this work, the separation of H2/N2 and H2/CO2 mixed gas through a porous alumina compact was carried out at room temperature. Figure 1 shows the ratio of gas permeability (¥á mol/msPa) of H2 to CO2 gases as a function of the pressure gradient. The ratio increased with decreasing pressure gradient. This trend was more significant at a higher CO2 composition of the inlet gas. In Fig. 1 the separation ratios for ideal Poiseuille flow (viscous flow) and Knudsen flow of CO2 and H2 gas were also presented. The measured result for 20%H2-80%CO2 mixed gas indicates the high separation ability when compared with the prediction from the ¥á value for single gas.
Acknowledgements :