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混合导体透氧膜指的是一类同时具有氧离子导电与电子导电性能的新型陶瓷膜 .在高温下 ,当膜两边存在氧浓度梯度时 ,氧可以从高氧压端向低氧压端透过 ,且理论上氧的选择透过性为 10 0 %.开发出一种新型的具有高透氧量、高稳定性的透氧材料Ba0 .5 Sr0 .5 Co0 .8Fe0 .2 O3 -δ,并成功地把其应用到甲烷部分氧化反应中 ,以空气为氧源利用透氧膜透过的氧与甲烷反应制合成气 ,使氧的膜分离与甲烷部分氧化反应一体化于一个膜反应器内完成 .实验结果表明 ,反应温度在 85 0℃ ,甲烷转化率为 88%以上 ,一氧化碳选择性在 97%以上 ,透氧量达到 7.8mL/ (cm2 ·min)
Mixed-conductor oxygen-permeable membrane refers to a new type of ceramic membrane that possesses both oxygen ion conductivity and electron conductivity. At high temperature, oxygen may permeate from the high oxygen pressure end to the low oxygen pressure end when the oxygen concentration gradient exists on both sides of the membrane And in theory the selective permeability of oxygen is 100%. A novel oxygen-permeable material Ba0.5Sr0.5Co0.8Fe0.2O3-δ with high oxygen permeability and high stability was developed, And successfully applied to the partial oxidation of methane in the air as an oxygen source through the use of oxygen permeable membrane oxygen and methane reaction of syngas, the oxygen membrane separation and partial oxidation of methane into a membrane reactor The experimental results show that the reaction temperature is 85 0 ℃, the conversion of methane is above 88%, the selectivity of carbon monoxide is above 97% and the oxygen permeability is 7.8mL / (cm2 · min)