燃料化学学报2012，Vol.40Issue(10)：1246-1251,6.
柠檬酸对负载型磷化镍催化剂加氢脱硫性能的影响
Effect of citric acid on hydrodesulfurization performance of the supported nickel phosphide catalyst
摘要
Abstract
The TiO2-Al2O3 complex support was prepared by the sol-gel method. A nickel phosphide catalyst, Ni2P/TiO2-Al2O3 with citric acid (CA) as chelating agent, was prepared by the impregnation method. The catalysts were characterized by X-ray diffraction (XRD), N2 -adsorption specific surface area measurements (BET), thermogravimetry-differential thermal analysis (TG-DTA) , temperature programmed reduction (TPR) and transmission electron microscope (TEM). The effects of different chelating agents and CA addition for dibenzothiophene (DBT) hydrodesulfurization (HDS) were studied. The result showed that the addition of appropriate amount of CA into the catalyst can enrich the pores of Ni2P/TiO2-Al2O3 catalyst, increase the surface area, which made better pore structure, higher dispersion of metal active component and more uniform size of the active component. CA can weaken the interaction between the active phase and the support, resulting in an apparent decrease in reduction temperature for nickel and phosphorus precursor as well as promotion of the formation of the Ni-P-O active phase. At reaction temperature of 360℃, pressure of 3. 0 Mpa, hydrogen/oil ratio of 500 (volume ratio) , liquid hourly space velocity of 2. 0 h-1 and reaction time of 4 h, the initial dibenzothiophene conversion was 99. 5% and stabilized at about 95.0% during 48 h reaction.关键词
磷化二镍/二氧化钛/三氧化二铝/加氢脱硫/柠檬酸/络合剂Key words
nickel phosphide/ titanium dioxide/ aluminium trioxide/ hydrodesulfurization/ citric acid/ chelating agent分类
化学化工引用本文复制引用
宋华,张永江,宋华林,代敏..柠檬酸对负载型磷化镍催化剂加氢脱硫性能的影响[J].燃料化学学报,2012,40(10):1246-1251,6.基金项目
国家自然科学基金(21276048). （21276048）
