复合催化剂CuO-MnO_2-CeO_2/13X制备及其对萘的催化性能

采用浸渍法制备出复合过渡金属氧化物催化剂Cu O-Mn O2-Ce O2/13X,并用氮吸附、SEM、XRD、TGA对其结构、组成及热稳定性进行了表征,同时在固定催化床中研究了Cu O-Mn O2-Ce O2/13X催化剂对萘的催化性能。BET分析表明6%Cu O-Mn O2-2%Ce O2/13X催化剂的比表面积达到了476 m2/g,平均孔径达到2.314 nm,SEM和XRD结果表明一定负载率下Cu O、Mn O2、Ce O2在13X表面呈高度分散状态,有利于催化剂的催化活性提高。催化降解实验结果表明助催化剂Ce O2的适量添加可以明显提高催化剂的性能,当催化剂的负载率为6%Cu O-Mn O2-2%Ce O2时其对萘的催化率达到了65%。

PREPARATION OF CuO-MnO2-CeO2/13X CATALYST AND ITS CATALYTIC PERFORMANCE FOR NAPHTHALENE

The transition metal oxide catalyst CuO-MnO2-CeO2 /13X was prepared by the impregnation method． The structure，compositions and thermal stability of the catalysts were characterized by N2 adsorption /desorption，SEM，XRD and TGA． Thecatalytic degradation property of CuO-MnO2-CeO2 /13X for naphthalene was investigated in a fixed catalyst bed． BET analysisshowed 6%CuO-MnO2-2%CeO2 /13X catalyst’s specific surface area was 476 m2 /g and its average pore size was 2. 314 nm．XRD and SEM results showed that CuO，MnO2 and CeO2 at 13X surface was highly dispersed state under certain load rate，which could improve the catalytic activity of catalysts． Experimental results indicated that adding appropriate amount of cocatalystCeO2 could improve the performance of the catalysts． The catalytic rate of naphthalene reached 65% when the catalystload factor was 6%CuO-MnO2-2%CeO2 ．