Highly Active Sulfided NiPMo Hydrodesulfurization Catalyst Prepared from Keggin-type Phosphomolybdic Acid

作     者：Zhu Tianhan Li Wenxu Wang Haiyong Wang Chenguang Yang Bin Zhu Tianhan;Li Wenxu;Wang Haiyong;Wang Chenguang;Yang Bin

作者机构：Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China 

出 版 物：《China Petroleum Processing & Petrochemical Technology》 (中国炼油与石油化工（英文版）)

年 卷 期：2023年第25卷第1期

页      面：133-143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] 08[工学] 0817[工学-化学工程与技术] 

基　　金：National Natural Science Foundation of China(Grant No.52006225). 

主　　题：Keggin-type phosphomolybdic acid hydrodesulfurization dibenzothiophene 

摘      要：A highly active sulfided NiPMo/MCM-41(NiPMo-S/M41)hydrodesulfurization(HDS)catalyst was successfully synthesized using Keggin-type phosphomolybdic acid as the phosphorus and molybdenum source and thioacetamide as the sulfur source.The supported catalysts NiPMo/M41,Ni_(2)P-Mo/M41,and Ni_(2)P/M41 were also prepared to investigate the effects of Mo,S,and the Keggin structure on the HDS performance.The HDS activities of NiPMo/M41 and NiPMo-S/M41 toward dibenzothiophene were much higher than that of Ni_(2)P-Mo/M41,demonstrating that the active phases in the Keggin-structured catalysts were significantly superior to the Mo-modified Ni_(2)P phase.The HDS activities of the catalysts followed the order NiPMo-S/M41(96.7%)NiPMo/M41(89.9%)Ni_(2)P-Mo/M41(53.5%)Ni_(2)P/M41(48.9%).For Ni_(2)P/M41,Ni_(2)P-Mo/M41,and NiPMo/M41,cyclohexylbenzene(CHB)was formed in low concentrations(21.0%),indicating that direct desulfurization was the favored reaction route and that this did not change for Keggin-structured NiPMo/M41.By contrast,the CHB selectivity of NiPMo-S/M41 increased to 44.6%,much higher than that of NiPMo/M41(17.6%),demonstrating that sulfidation enhanced the hydrogenation ability,which was ascribed to a metal-acid synergistic effect.