硫化型催化剂的活性相及其加氢脱硫活性  

Active Phase of Sulfide-Type Catalyst and Its Activity for Hydrodesulfurization

作　　者：徐黎明[1] 高玉兰[1] 彭绍忠[1] 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《石油化工》2013年第3期281-285,共5页Petrochemical Technology

摘　　要：以常规金属无机盐及硫化剂为原料合成硫化物前体,在硫化物前体溶液中加入有机助剂配成浸渍液,浸渍氧化铝载体制成镍钼基直接硫化型加氢催化剂(简称硫化型催化剂);采用XPS、TEM和高压DSC等分析方法对催化剂进行分析和表征,初步探索了催化剂中活性相的形成过程,并考察了催化剂的加氢脱硫活性。实验结果表明,硫化过程中硫化型催化剂上金属先经+5价的过渡态,再逐步生成二硫化钼相;有机助剂的加入不仅改变了催化剂的硫化过程,促进了金属镍在二硫化钼表面的分布,形成高活性的Ni Mo S相,还使硫化时的放热峰弥散减小,可避免开工过程的床层飞温问题。硫化型催化剂表面上活性金属完全硫化,催化剂的加氢脱硫活性高。Sulfide-type catalysts were prepared by isochoric impregnation and characterized by means of XPS, TEM and high pressure DSC. The impregnation solutions were prepared by adding the organic additives into sulfide precursor solutions, which was synthesized from metallic salts and sulfurizing agents. The hydrodesulfurization activity and active phase formation of the catalysts were studied. Metals in the sulfide-type catalysts first changed into transitive ＋5 valence state, and then gradually changed into MoS2 phase. The organic additives can not only change the sulfuration process, promote the dispersion of nickel metal on the MoS2 surface and formation of highly active Ni-Mo-S phase, but also decrease the exothermic peak to avoid too high temperature in the process. The active metals on the sulfide-type catalyst surface were sulfurized completely and the hydrodesulfurization activity of the sulfide-type catalysts was high.

关 键 词：硫化型催化剂 活性相 有机助剂 加氢脱硫 

分 类 号：TQ426[化学工程]