3%，摩爾分?jǐn)?shù))時(shí)，聚集在膜表面附近的CO2對氫氣傳質(zhì)的阻塞作用是氫滲透率降低的主要因素；當(dāng)CO2濃度較低 (<1%)時(shí), CO2在膜表面吸附，占據(jù)氫的活性點(diǎn)位，是氫滲透率降低的主要因素。"/>

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CO2對Pd8Y0.23Ru合金膜氫滲透性能的影響
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中物院雙百人才基金（雙2010-4）


Effect of CO2 on Hydrogen Permeation through Pd8Y0.23Ru Alloy Membrane
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    在300~450 ℃范圍內(nèi)，研究氫中加入CO2對Pd8Y0.23Ru合金膜氫滲透性能的影響。結(jié)果表明，CO2的加入會大大降低膜的氫滲透率，CO2濃度越高，氫滲透率降低越多；CO2對Pd8Y0.23Ru合金膜存在一定的毒化作用，使氫滲透率下降，450 ℃下的毒化作用明顯強(qiáng)于300 ℃，但隨著時(shí)間的延長，滲透率降低速率趨緩。CO2降低氫滲透率還有另外2個(gè)因素：當(dāng)CO2濃度較高 (>3%，摩爾分?jǐn)?shù))時(shí)，聚集在膜表面附近的CO2對氫氣傳質(zhì)的阻塞作用是氫滲透率降低的主要因素；當(dāng)CO2濃度較低 (<1%)時(shí), CO2在膜表面吸附，占據(jù)氫的活性點(diǎn)位，是氫滲透率降低的主要因素。

    Abstract:

    Hydrogen permeation through a Pd8Y0.23Ru alloy membrane at 300 oC~450 oC has been investigated in the presence of CO2. The results show that the hydrogen permeability is greatly decreased by CO2 addition. The higher the CO2 concentration is, the more significant the reduction of hydrogen permeation will be. The coexisting CO2 gas has a poison effect on Pd8Y0.23Ru alloy membrane. The poison effect at 450 oC is stronger than at 300 oC. The reduction rate of hydrogen permeation decreases with the permeation duration. Besides poison effect, the negative effects of CO2 on H2 permeation are also caused by two other factors. Firstly, for higher concentration of CO2 (>3%), mass transfer of H2 ?is blocked by CO2 barrier layer near the membrane surface, which is the main reason for hydrogen permeation reduction. Secondly for lower concentrations (<1%), the main reason is the effects of CO2 adsorbing on the membrane and occupying active dissociation sites of hydrogen.

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程 亮,陸光達(dá),張桂凱,王曉英. CO2對Pd8Y0.23Ru合金膜氫滲透性能的影響[J].稀有金屬材料與工程,2013,42(6):1246~1249.[Cheng Liang, Lu Guangda, Zhang Guikai, Wang Xiaoying. Effect of CO2 on Hydrogen Permeation through Pd8Y0.23Ru Alloy Membrane[J]. Rare Metal Materials and Engineering,2013,42(6):1246~1249.]
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  • 收稿日期:2012-06-15
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