氧化锌负载四(4-硝基苯基)钴卟啉催化氧化环己烷性能  

The Catalytic Performance of Cobalt Tetra( 4-nitrophonyl)Metalloporphyrin Supported on Zinc Oxide in Cyclohexane Oxidation

作　　者：冯泽[1] 颉雨佳[2] 郝芳[1] 刘平乐[1] 罗和安[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105 [2]湖南工业大学冶金工程学院,湖南株洲412008

出　　处：《分子催化》2016年第1期20-28,共9页Journal of Molecular Catalysis(China)

基　　金：湖南省战略性新兴产业项目(2015GK1060)~~

摘　　要：将四(4-硝基苯基)钴卟啉(Co-TNPP)负载在氧化锌(Zn O)载体制备负载型金属卟啉催化剂Co-TNPP/Zn O,并对其进行了紫外-可见漫反射光谱(UV-vis),红外光谱(FT-IR),X射线衍射(XRD),热重分析(TG/DTG),比表面分析(BET)和电感耦合等离子体(ICP)表征.考察了催化剂在无溶剂的条件下催化氧气氧化环己烷的性能.实验结果表明:在反应温度为150℃,氧气压力为1.2 MPa,反应时间为2.0 h的条件下,环己烷转化率9.82%,环己醇和环己酮选择性83.37%.负载型金属卟啉催化剂经过5次循环使用,环己烷的平均转化率和环己醇、环己酮平均选择性分别为9.95%、83.61%,催化剂的平均转化数为2.18×105.负载型金属卟啉催化剂Co-TNPP/Zn O在较温和的条件下表现出优良的环己烷催化氧化性能,克服了金属卟啉催化剂难以回收、无法循环使用的缺点,具有很好的工业价值和应用前景.Co-TNPP / Zn O catalyst was prepared by loading cobalt tetra（ 4-nitrophonyl） metalloporphyrin（ CoTNPP） on zinc oxide（ Zn O）. The catalyst was characterized by UV-vis,FT-IR,XRD,TG / DTG,BET and ICP.The catalytic performance was investigated in cyclohexane oxidation without solvent. The results show that the cyclohexane conversion is 9. 82% and the select ivity to cyclohexanol and cyclohexanone is 83. 37% at the reaction temperature of 150 ℃,oxygen pressure of 1. 2 MPa and reaction time of 2. 0 h; Moreover,after recycle 5 times,the average conversion of cyclohexane is 9. 95%,the selectivity to cyclohexanol and cyclohexanone is 83. 61% and the average catalytic turnover number reaches to 2. 18 × 105. Co-TNPP / Zn O shows better catalytic performance under mild reaction conditons and it overcomes the defect that metal porphyrins is difficult to recover and recycle. It presents high commercial value and application prospect.

关 键 词：四(4-硝基苯基)钴卟啉 氧化锌 氧化 催化剂 环己烷 

分 类 号：O643.32[理学—物理化学]