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采用改进的Pechini法合成了 (Ba ,Ca) (Co ,Fe)O3 -δ系列材料 ,对其结构、透氧量及透氧稳定性进行了考察 .结果表明 ,材料具有较高的透氧量和透氧稳定性 ,其中Ba0 .95Ca0 .0 5Co0 .8Fe0 .2 O3 -δ在 95 0℃透氧量高达 1 4ml/ (cm2·min) ,85 0℃稳定操作 16 0h以上 .将其应用于膜反应器 ,对无催化剂的甲烷氧化偶联反应作了尝试 .结果表明 ,对甲烷氧化偶联反应具有较高的选择性 ,但甲烷转化率较低
The (Ba, Ca) (Co, Fe) O3 -δ series materials were synthesized by a modified Pechini method and their structures, oxygen permeability and oxygen permeation stability were investigated. The results show that the material has high oxygen permeability And oxygen permeability, of which Ba0.95Ca0.0Co0.8Fe0.2O3-δ had a high oxygen permeation rate of 14ml / (cm2 · min) at 95 0 ℃ and stable operation at 160 ℃ for more than 160h, Membrane reactor, an attempt was made on the catalyst-free methane oxidative coupling reaction.The results showed that the methane oxidative coupling reaction has a high selectivity, but the methane conversion rate is relatively low