磷改性TiO_2-Al_2O_3复合载体在超深度加氢脱硫中的应用  

Application of TiO_2-Al_2O_3 Composite Support Modified with Phosphorus to Ultra Deep Hydrodesulfurization

作　　者：李伟[1] 李生祥[1] 张明慧[1] 陶克毅[1] 王京[2] 

机构地区：[1]南开大学化学学院材料化学系新催化材料科学研究所,天津300071 [2]南开大学化学学院化学系,天津300071

出　　处：《催化学报》2005年第9期755-758,共4页

基　　金：国家自然科学基金(20273035和20233030);天津市自然科学基金(033802511);南开大学创新课题基金资助项目.

摘　　要：研究了磷改性对纳米TiO2-Al2O3复合载体负载CoMo催化剂的结构和性质的影响,并以4,6-二甲基二苯并噻吩为探针考察了CoMo/P-TiO2-Al2O3催化剂的超深度加氢脱硫性能.结果表明,在复合载体中加入适量的磷酸盐能够减弱载体组分Al2O3同Co和Mo金属活性组分之间的强相互作用,使硫化后的催化剂中生成具有更高催化活性的多层MoS2簇结构.而过量磷酸盐的加入则会降低载体的比表面积,使催化剂中出现晶态的CoMoO4,导致催化剂活性降低.The influence of phosphorus modification on the structure and property of CoMo/TiO2-Al2O3 catalyst was investigated. The laser Raman and FT-IR results showed that the addition of phosphate to TiO2-Al2O3 composite support weakens the interaction between the support and the metal Co or Mo. More muhi-lavered MoS2 clusters which are more active than singlc-layered MoS2 clusters were observed in the phosphorus-modified catalyst due to the weaker metal-support interaction. In the hydrodesulfurization of 4,6-dimethyldibenzothiophene, the catalyst modified with a moderate amount of phosphate showed higher activity.

关 键 词：钴 钼 氧化钛 氧化铝 复合载体 加氢脱硫 磷 改性 

分 类 号：TE624.55[石油与天然气工程—油气加工工程]