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用EDTA 柠檬酸联合络合法合成了Ba0 .5Sr0 .5Co0 .8Fe0 .2 O3 δ混合导体透氧膜材料 ,并考察了膜片本身对甲烷的活化性能 .结果表明 ,导体膜对甲烷氧化偶联 (OCM )反应具有催化活性 .研究了膜反应器中甲烷部分氧化(POM )制合成气反应 ,发现在开始阶段甲烷转化率有两次快速升高 ,第一次是由于甲烷与二氧化碳重整而产生的 ;第二次是由于透氧量增加而导致的 .透氧量随温度的升高而增加 ,85 0℃时甲烷转化率达 96 % ,一氧化碳选择性为97.3% ,透氧量为 11ml/ (cm2 ·min) .EDS和XRD分析结果表明 ,反应后透氧膜内表面有碳酸盐生成 ,但不影响膜的透氧性能
The synthesis of Ba0.5Sr0.5Co0.8Fe0.2O3 δ mixed-conductor oxygen-permeable membrane by EDTA-citric acid complexation was studied and the activation of methane on the membrane itself was investigated. The results showed that the conductivity of the membrane on the oxidation of methane (OCM) .The catalytic activity of partial oxidation of methane (MOM) to syngas in a membrane reactor was studied and it was found that there were two rapid increases in methane conversion in the initial stage. The first was due to the reforming of methane and carbon dioxide The second is due to the increase of oxygen permeability.The oxygen permeability increases with the increase of temperature, the conversion of methane reaches 96% at 85 ℃, the selectivity of carbon monoxide is 97.3% and the oxygen permeability is 11ml / (cm2 · min). The results of EDS and XRD showed that carbonate was formed on the inner surface of the oxygen-permeable membrane after the reaction but did not affect the oxygen permeability of the membrane