【摘要】 以α-Al₂O₃为支撑层,UiO-66为分离层,Co₃O₄为催化层,构建了Co₃O₄/UiO-66@α-Al₂O₃陶瓷膜.对其形貌结构进行了表征,并研究了其对挥发性有机物（VOCs）的分离催化性能.结果表明,该陶瓷膜对喷涂行业废气中苯与吡啶两种主要成分体现出良好的分离性,透过侧的气体中吡啶与苯的摩尔浓度比值可由给料侧的1提高至17;体系中引入臭氧后,给料侧苯的浓度明显降低,其去除率可达到89%.透过侧的吡啶去除率仅为27%,得到了较大程度的保留,剩余的吡啶经收集后可进行单独的深度处理.Co₃O₄/UiO-66@α-Al₂O₃陶瓷膜在对喷涂行业废气中苯成分高效降解的同时,能够有效解决喷涂行业废气处理过程中氮氧化物的排放问题,有望成为喷涂行业废气预处理工艺的理想选择.更多还原

【Abstract】 Co₃O₄/UiO-66@α-Al₂O₃ceramic membranes were constructed with α-Al₂O₃as the support layer,UiO-66as the separation layer,and Co₃O₄as the catalytic layer.The ceramic membrane exhibits outstanding separation performance of benzene/pyridine.The molar concentration ratio of pyridine to benzene in the gas on the permeate side can be increased from 1 to 17 on the feed side.After O₃was introduced into the system,the concentration of benzene on the feed side was significantly reduced,and its removal rate can reach 89%.The removal rate of pyridine on the permeate side was only 27%,which was retained to a large extent,and the remaining pyridine could be collected for separate advanced treatment.The Co₃O₄/UiO-66@α-Al₂O₃ceramic membrane can effectively solve the emission problem of nitrogen oxides in the waste gas treatment process of the spraying industry,and is expected to be an ideal choice for the waste gas pretreatment process of the spraying industry.更多还原