化工进展Issue(6)：1656-1660,1689,6.DOI:10.16085/j.issn.1000-6613.2015.06.026
焙烧及还原条件对Ni2P/TiO2-Al2O3催化剂加氢脱硫性能的影响
Effect of calcination and reduction conditions on hydrodesulfurization performance of the Ni2P/TiO2-Al2O3 catalyst
摘要
Abstract
The TiO2-Al2O3 complex support was prepared by 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) and N2-adsorption specific surface area measurements (BET). The effects of calcination temperature of support,calcination temperature of catalyst,reduction temperature,reduction pressure and calcination time of catalyst on catalyst activity for dibenzothiophene (DBT) hydrodesulfurization (HDS) were studied. The result showed that increasing the calcination temperature of support favored dispersion of active species on catalyst surface. The optimal calcination temperature of support was 550℃ because of catalyst sintered by excessive temperature. When reduction temperature was in the reange of 500—550℃,the active phase was mixed phases of Ni12P5 and Ni2P. The peak intensities of Ni12P5 increased with the reduction temperature increasing. At reduction temperature of 700℃,the single Ni2P phase was observed. The Ni2P/TiO2-Al2O3 catalyst prepared under a support calcination temperature of 550℃,a catalyst calcination temperature of 500℃,a reduction temperature of 700℃ under atmospheric pressure was found to be optimal. At reaction temperature of 360℃,pressure of 3.0MPa,hydrogen/oil ratio of 500 (V/V),and liquid hourly space velocity of 2.0h−1,the conversion of dibenzothiophene HDS was 99.5%in 4h.关键词
磷化二镍/催化剂/加氢脱硫/柠檬酸/制备Key words
nickel phosphide/catalyst/hydrodesulfurization/citric acid/preparation分类
能源科技引用本文复制引用
苑丹丹,张永江,李锋,宋华..焙烧及还原条件对Ni2P/TiO2-Al2O3催化剂加氢脱硫性能的影响[J].化工进展,2015,(6):1656-1660,1689,6.基金项目
国家自然科学基金（21276048）、黑龙江省自然基金（ZD201201）及黑龙江省教育厅项目(12541080)。 （12541080）
