Mo负载量及助剂Co对耐硫甲烷化催化剂性能的影响  

Effect of Mo Loading and Additive Co on Activity of Sulfur-Resistant Methanation Catalyst

作　　者：李振花[1] 王二东[1] 丁国忠[1] 尚玉光[1] 王海洋[1] 王保伟[1] 吕静[1] 马新宾[1] 秦绍东 孙琦 

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072 [2]北京低碳清洁能源研究所,北京102209

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第6期546-552,共7页Journal of Tianjin University：Science and Technology

摘　　要：考察了Mo基耐硫甲烷化催化剂中Mo负载量的影响.结果表明,MoO3的最佳负载量为其单层饱和负载量,大于此负载量后催化剂表面将出现MoO3晶型和颗粒团聚现象,这导致了其甲烷化活性降低.助剂CoO的添加会抑制Mo基催化剂的甲烷化活性,主要原因是生成了钼酸钴晶相,使得甲烷化活性位减少,从而导致了甲烷化活性的降低.实验结果为耐硫甲烷化催化剂设计提供了重要依据.The effect of Mo loading on the activity of Mo/A1203 and Mo/25%CeO2-A1203 catalysts for sulfur-resistant methanation reaction was studied, and the optimum Mo loading was proved to be the monolayer coverage of MoO3 over the support. At larger MoO3 loading, crystallized MoO3 is formed and its size increases with the increase of MoO3 loading, which is considered one of the factors in the decrease of methanation activity. Addition of Co to Mo/AI2O3 and Mo/25%CeO2-Al2O3 reduces methanation activity, and the characterization results by means of N2 adsorption-desorption, X-ray diffraction （XRD） and laser Raman spectrum （LRS） show that the formation of crystalline CoMoO4 is the main factor. All of the above provide a guidance for designing high performance sulfur-resistant methanation catalysts.

关 键 词：仲钼酸铵 氧化钴 甲烷化 耐硫催化剂 

分 类 号：O643.36[理学—物理化学]