免预硫化的加氢脱硫MoNiP/Al_2O_3催化剂的制备和表征  

Preparation and Characterization of Presulfidation-Free MoNiP/Al_2O_3 Catalyst for Thiophene Hydrodesulfurization

作　　者：林凌[1] 伊晓东[1] 邱波[1] 王跃敏[1] 李天赋[1] 方维平[1] 万惠霖[1] 

机构地区：[1]厦门大学化学化工学院,固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《催化学报》2007年第12期1096-1100,共5页

基　　金：国家重点基础研究发展计划(973计划;2004CB217805);厦门大学科技创新项目(XDKJCX20051002)

摘　　要：在Mo-Ni-P-O浸渍液中添加一定量的极性有机物如柠檬酸等,采用共浸渍法制备了一种不需预硫化和焙烧也具有较高加氢脱硫活性的MoNiP/Al2O3催化剂,并用N2吸附、程序升温还原、X射线光电子能谱、红外光谱和元素分析对催化剂进行了表征.结果表明,柠檬酸的添加削弱了金属组分与载体间的相互作用,有利于金属组分在载体表面的分散,且改善了催化剂的还原性,使催化剂在与含硫反应物料接触过程中自发硫化,从而有利于催化剂加氢脱硫活性的提高.A new type of MoNiP/Al2O3 catalyst for thiophene hydrodesulfurization was prepared by the co-impregnation method, wherein a suitable amount of citric acid was added in the Mo-Ni-P-O impregnation solution. The catalyst exhibits high activity for thiophene hydrodesulfurization under presulfidation- and calcination-free conditions. The catalyst was characterized by N2 adsorption, temperature-programmed reduction, X-ray photoelectron spectroscopy, infrared spectroscopy, and elemental analysis methods. The effects of citric acid on the structure and activity of the MoNiP/Al2O3 catalyst were studied. The results show that the addition of citric acid weakens the interaction between the active metal components and support, improves dispersion of active metal components on the support surface, and promotes the reduction and sulfidation of the catalyst by sulfur-containing feedstocks. Therefore, the hydrodesulfurization activity of the catalyst is improved.

关 键 词：钼 镍 磷 氧化铝 免预硫化 噻吩 加氢脱硫 

分 类 号：O643.3[理学—物理化学]