掺杂金属的六铝酸盐催化甲烷燃烧性能研究  

Research on Combustion Performance of Metal Substituted Hexaaluminate Catalyzed Methane

作　　者：张亚萍 

机构地区：[1]山西轻工职业技术学院,山西太原030000

出　　处：《精细石油化工进展》2016年第6期43-45,50,共4页Advances in Fine Petrochemicals

摘　　要：采用共沉淀法制备了六铝酸盐催化剂CeCoAl_(11)O_(19),通过测试催化剂的活性,研究了焙烧温度和掺杂金属离子对其催化燃烧性能的影响。研究表明,1 200℃焙烧温度制得的六铝酸盐催化剂表现出较好的催化活性;掺杂金属离子可明显提高其催化活性;Mn^(2+)的半径与Al^(3+)半径比较接近,易于进入六铝酸盐骨架并促进六铝酸盐的形成,掺杂Mn^(2+)的催化剂表现出更高的催化活性。活性最高的催化剂是在1 200℃焙烧下混合掺杂Co、Mn制得的CeCoMnAl_(10)O_(19)。Hexaaluminate catalyst CeCoAl11O19 was prepared with co-precipitation method,and the effects of different calcination temperatures and metallic ion substitution degree on its catalytic combustion activity were studied by testing the activity of catalyst. The results of study have shown that the hexaaluminate catalyst that is prepared at the calcination temperature of 1 200 ℃ exhibits good catalytic activity,its catalytic activity can be increased substantially after it is substituted by metallic ions,and Mn^2＋can access to the skeletal structure of hexaaluminate esaily,thus promoting the formation of hexaaluminate because its radius is approximate to that of Al^3＋,therefore the catalyst substituted by Mn^2＋exhibits higher catalytic activity. The catalyst of highest activity is CeCoMnAl（10）O（19） that is prepared at the calcination temperature of 1 200 ℃ and is substituted by Co and Mn ions.

关 键 词：甲烷 催化燃烧 六铝酸盐 掺杂 活性 金属离子 

分 类 号：O643.36[理学—物理化学]