Performance of a mixed-conducting ceramic membrane reactor with high oxygen permeability for methane conversion

摘要

A mixed-conducting perovskite-type Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_3-δ (BSCFO) ceramic membrane reactor with high oxygen permeability was applied for the activation of methane. The membrane reactor has intrinsic catalytic activities for methane conversion to ethane and ethylene. C_2 selectivity up to 40-70/100 was achieved, albeit that conversion rate were low, typically 0.5-3.5/100 at 800-900 deg.C with a 50/100 helium diluted methane inlet stream at flow rate of 34 ml/min. Large amount of unreacted molecular oxygen was detected in the eluted gas and the oxygen permeation flux improved only slightly compared with that under non-reactive air/He experiments.