新型Cu-Mn/TiO_2和Cu-Mn/γ-Al_2O_3甲醛催化氧化催化剂的研制及活性  

Catalytic oxidation of formaldehyde over Cu-Mn catalysts supported on TiO_2 and γ-Al_2O_3 dioxide

作　　者：李玮[1] 黄丽丽[2,3] 翟友存[2,3] 宁晓宇[2,3] 邹克华[2,3] 

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津市环境保护科学研究院国家环境保护恶臭污染控制重点实验室,天津300191 [3]天津迪兰奥特环保科技开发有限公司,天津300191

出　　处：《化工进展》2015年第1期127-132,172,共7页Chemical Industry and Engineering Progress

基　　金：天津市应用基础及前沿技术研究计划(12JCYBJC15000);天津科技创新体系及平台建设计划(13TXGCCX06200)项目

摘　　要：采用浸渍法制备了Cu-Mn/γ-Al2O3、Cu-Mn/Ti O2新型催化剂,研究了在不同温度、不同气体流速下对甲醛的催化活性以及50h下催化剂的稳定性,并与Cu-Mn复合氧化物催化剂进行对比。结果表明:γ-Al2O3、Ti O2与Cu-Mn之间的协同作用提高了催化剂对甲醛的催化活性,且Cu-Mn/γ-Al2O3在150℃可以实现甲醛的完全去除,比Cu-Mn/Ti O2和Cu-Mn复合氧化物催化剂分别低80℃和140℃。3种催化剂的甲醛去除率随气速的增加而下降,且变化大小顺序为Cu-Mn/Ti O2>Cu-Mn/γ-Al2O3>Cu-Mn复合氧化物。50h后Cu-Mn/γ-Al2O3和Cu-Mn复合氧化物催化剂去除率仍为100%,Cu-Mn/Ti O2去除率在94%以上。采用XRD、BET和SEM-EDS等技术手段对制备的Cu-Mn/Ti O2、Cu-Mn/γ-Al2O3和Cu-Mn复合氧化物进行了表征。Two new types of γ-Al2O3 and Ti O2 supported Cu-Mn complex oxide catalysts were prepared by solution impregnation and compared with Cu-Mn complex oxide. The effect of temperature,gas flow rate and the stability in 50 h were studied. The results showed that the catalytic activity of the Cu-Mn/γ-Al2O3,Cu-Mn/Ti O2 was promoted by the synergetic effect of Cu-Mn and Ti O2,γ-Al2O3. Cu-Mn/γ-Al2O3,in particular,could catalyze the complete oxidation of formaldehyde at a temperature as low as 150℃,which is 80℃ and 140℃ lower than that by Cu-Mn/Ti O2 and Cu-Mncomplex oxide respectively. The CH2 O removal rates of the three catalysts decrease with the increase of gas velocity. It was found that the order of changes was Cu-Mn/Ti O2Cu-Mn/γ-Al2O3 Cu-Mn complex oxide. The CH2 O removal rate of Cu-Mn/γ-Al2O3 and Cu-Mn complex oxide still is 100% after 50 h,while the CH2 O removal rate of Cu-Mn/Ti O2 was morethan 94%. XRD,BET,SEM-EDS were used to describe the properties of the Cu-Mn catalyst.

关 键 词：甲醛 催化剂 催化剂载体 氧化 Cu-Mn复合氧化物 Cu-Mn/γ-Al2O3 Cu-Mn/Ti O2 

分 类 号：TQ426.82[化学工程]