CeO2BaMnAl11O19-α催化剂制备及甲烷催化燃烧研究.pdf

2004年第 62卷第 4期, 373~ 376 化学学报 ACTA CHIMICA SINICA Vol . 62 , 2004 No. 4 , 373~ 376 CeO 2/ BaMnAl 11O 19 - α催化剂制备及甲烷催化燃烧研究徐金光 a 田志坚Ξ, a 王军威 a 徐云鹏 a 徐竹生 a 林励吾 a,b Ξ(中国科学院大连化学物理研究所 a天然气化工与应用催化研究室 b催化基础国家重点实验室大连 116023 ) 摘要采用反相微乳液法制备了 BaMAl 11O 19 -α(M=Mn , Co , Ce )催化剂,研究了 M对催化剂相组成、比表面积和甲烷催化燃烧活性的影响. Mn促进六铝酸盐的形成,Mn基催化剂比表面积虽低,甲烷燃烧活性却较高. Ce基催化剂的热稳定性高, 比表面积大幅度增加,但甲烷催化燃烧活性比 Mn基催化剂低. Ce和 Mn的共同作用使 CeO 2/ BaMnAl 11O 19 - α催化剂不仅比表面积较大, 100 h连续试验中,CeO 2/ BaMnAl 11O 19 - α催化剂活性稳定,有望成为催化热汽轮机燃烧器的潜在催化剂之一. 关键词甲烷,催化燃烧,反相微乳液,CeO 2 Preparation of CeO 2/ BaMnAl 11O 19 - αCatalysts and Application in bustion XU , Jin2 Guang a TIAN , Zhi2 Jian Ξ, a WANG, Jun2 Wei a XU , Yun2 Peng a XU , Zhu2 Sheng a LIN , Li2 Wu a,b ( aLaboratoryofNaturalGasUtilizationandAppliedCatalysis, bStateKeyLaboratoryofCatalysis,DalianInstituteofChemicalPhysics, ChineseAcademyofSciences,Dalian116023 ) Abstract CeO 2had a lower activity for hydrocarbon oxidation according to the correlation between the rate of hydrocarbon oxidation and metal2 oxygen bond strength (volcano plot ). However , the CH 4combustion activity of the nanosized CeO 2supported on barium hexaaluminates was so high that the temperature for 10 % conversion parable with that of noble metal oxide catalysts. Such a result has attracted considerable attention due to effect of preparation on the structure bustion activity of CeO 22 contain