摘要
以甲苯催化燃烧为模型反应,考察了Cu-Mn-O催化剂共沉淀制备方法中沉淀剂、滴加方式和焙烧温度对其催化活性的影响。结果表明,以Na2CO3为沉淀剂、反滴(金属离子溶液滴加到碱液)、500℃焙烧所制得的催化剂具有较高的活性,其甲苯完全燃烧(甲苯转化率98%以上)温度为220℃。多晶粉末衍射(XRD)和比表面积(BET)表征发现,在Cu1.5Mn1.5O4晶相中掺杂少量的CuO晶相可以有效地提高催化剂活性,催化剂的比表面积(BET)越大,活性越高。
The catalytic combustion of toluene by Cu-Mn-O was investigated to show the effects of catalyst preparation conditions such as precipitant, the titration procedure, and calcination temperature. The results indicated that the catalyst prepared by using Na2 CO3 as precipitant, reverse-titration （the addition of aqueous of Cu（NO3 ）2 and Mn（NO3 ）2 to the basic solution of Na2 CO3）, and calcination at 500℃ exhibited highest activities. The toluene could be completely removed on the catalyst near 220℃. By XRD and BET characterization of catalysts, it was found that a small amount of CuO in the active phase of Cu1.5 Mn1.5O4 could promote catalytic performance. The catalyst with greater surface area exhibited higher activity.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2008年第5期26-28,37,共4页
Environmental Pollution & Control
基金
浙江省科技厅重大专项(No.2007C13042)
