超滤膜法CuO-ZnO复合催化剂的制备及催化性能

采用中空纤维超滤（UF）膜反应器制备了CuO-ZnO复合催化剂，考察了复合方式、ZnO含量及催化反应条件等因素对催化剂性能的影响。结果表明：共沉淀法制备的CuO-ZnO催化剂由于形成的铜锌固溶体具有协同催化效应，其性能优于复配法制备的CuO/ZnO催化剂；当ZnO质量分数为25%时，CuO-ZnO催化剂的比表面积达40.47 m2/g，颗粒粒径为19 nm；该催化剂在反应温度为90 ℃、用量为9 g/L条件下催化异丙苯氧化反应时，过氧化氢异丙苯产率可达38.74%，反应选择性达到84.62%，表现出最佳催化效果。

Preparation of nano-sized CuO-ZnO composite particles by UF membrane method and their catalysis performance

A series of nano-sized CuO-ZnO composite particles were synthesized with a UF membrane reactor and were used for the oxidation of cumene reaction.It was found that CuO-ZnO prepared by the co-precipitation method had better catalyst performance than CuO/ZnO prepared by blending CuO with ZnO with the same ZnO content.The SEM results showed that ZnO was dispersed well in CuO in the case that the ZnO weight content in CuO-ZnO was 25%.The effect of ZnO content in CuO-ZnO on the catalytic performance for cumene oxide reaction was also investigated.With increasing ZnO content,catalytic performance reach a maximum value of CHP yield of 28% and selectivity of over 84.62% at ZnO weight content of 25% under the same reaction conditions:temperature,90 ℃;CuO-ZnO particle dosage 10 g/L;airflow rate 600 mL/min.