Combined Promoting Effects of Specific Organic Functional Groups and Alumina Surface Characteristics for the Design of a Highly Efficient NiMo/Al_(2)O_(3) Hydrodesulfurization Catalyst
作者机构:National Energy R&D Center of Petroleum Refining TechnologySINOPEC Research Institute of Petroleum Processing Co.Ltd.Beijing 100083China
出 版 物:《China Petroleum Processing & Petrochemical Technology》 (中国炼油与石油化工(英文版))
年 卷 期:2024年第26卷第1期
页 面:1-11页
核心收录:
学科分类:0820[工学-石油与天然气工程] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学]
基 金:funding of the National Key Research and Development Plan(Grant 2017YFB0306600) the Project of SINOPEC(NO.117006)
主 题:alumina Mo equilibrium adsorption capacity organic functional groups metal-support interaction hydrodesulfurization
摘 要:To prepare a highly efficient NiMo/Al_(2)O_(3) hydrodesulfurization catalyst,the combined effects of specific organic functional groups and alumina surface characteristics were ***,the correlation between the surface characteristics of four different alumina and the existing Mo species states was *** was found that the Mo equilibrium adsorption capacity can be used as a specific descriptor to quantitatively evaluate the changes in surface characteristics of different alumina.A lower Mo equilibrium adsorption capacity for alumina means weaker metal-support interaction and the loaded Mo species are easier to transform into ***,the Mo-O-Al bonds still exist at the metal-support *** introduction of cationic surfactant hecadecyl trimethyl ammonium bromide(CTAB)can further improve Mo species dispersion through electrostatic attraction with Mo anions and interaction of its alkyl chain with the alumina surface;meanwhile,the introduction of ethylenediamine tetraacetic acid(EDTA)can complex with Ni ions to enhance the Ni-promoting effect on ***,the NiMo catalyst designed using alumina with lower Mo equilibrium adsorption capacity and the simultaneous addition of EDTA and CTAB exhibits the highest hydrodesulfurization activity for 4,6-dimethyl dibenzothiophene because of its proper metal-support interaction and more well-dispersed Ni-Mo-S active phases.