【摘要】 采用溶胶-凝胶法制备了系列的LaMAl11O19(M=Fe,Co,Ni,Mn,Cu)催化剂,并且用XRD、BET、TEM等技术对其进行表征。进一步研究了M对六铝酸盐催化剂的形成、比表面积、燃烧活性的影响。结果表明M促进了六铝酸盐催化剂的形成,其中Mn取代的六铝酸盐催化剂的热稳定性高,而且具有更高的甲烷催化活性。更多还原

【Abstract】 serias of different metal substituted hexaaluminate catalysts LaMAl11O19(M=Fe、Co、Ni、Mn、Cu) were prepared by sol-gel metod,and they were charaterized with the help of XRD,BET and SEM..the effect of different metal on structure,specific surface area and catalytic activity for methane combustion was investigated over LaMAl11O19(M=Fe、Co、Ni、Mn、Cu).the result indicated that M contributed to form hexaaluminte crystal phase more easily,and Mn-substituted catalyst was more stable in high temperature and had more excellent catalytic activity for methane combustion.更多还原