Zhu Lei, Li Xi, Liu Zhiying, Yao Lin, Yu Peng, Wei Ping, Xu Yanhua, Jiang Xingmao
College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China.
School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 210009, China.
Nanomaterials (Basel). 2019 May 1;9(5):675. doi: 10.3390/nano9050675.
Mn-Ce-Zr-O catalysts doped with varying Mn content were prepared and assessed for the catalytic combustion of chlorobenzene (CB). Nanosized MCZ-0.67 catalyst with amorphous phase exhibited a high and stable catalytic activity among the studied catalysts, achieving 90% CB conversion at 226 °C and withstanding stability tests, including time-based stability and the successive influence of various operating conditions. Meanwhile, the MCZ-0.67 catalyst used showed good recyclability by calcination in air. Characterization results suggested that Mn doping played a dominant role in improving the catalytic performance, resulting in larger surface area, better redox properties and greater amounts of surface active oxygen. In addition, the introduction of Zr was also indispensable for maintaining the good catalytic performance of catalysts. Finally, trace amounts of polychlorinated by-products during CB oxidation were monitored and the oxidation process was discussed.
制备了不同锰含量掺杂的Mn-Ce-Zr-O催化剂，并对其催化燃烧氯苯（CB）的性能进行了评估。具有非晶相的纳米级MCZ-0.67催化剂在所研究的催化剂中表现出高且稳定的催化活性，在226℃时实现了90%的氯苯转化率，并经受了包括基于时间的稳定性和各种操作条件的连续影响在内的稳定性测试。同时，所使用的MCZ-0.67催化剂通过在空气中煅烧表现出良好的可回收性。表征结果表明，锰掺杂在提高催化性能方面起主导作用，导致更大的表面积、更好的氧化还原性能和更多的表面活性氧。此外，锆的引入对于维持催化剂的良好催化性能也是不可或缺的。最后，监测了氯苯氧化过程中痕量多氯副产物，并对氧化过程进行了讨论。
