一种体相加氢脱硫催化剂的程序升温硫化表征  

Characterization of a Series of Bulk HDS Catalysts by Temperature-programmed-sulfiding(TPS)

作　　者：杨春雁[1] 杨卫亚[1] 凌凤香[1] 范峰[1] 

机构地区：[1]中国石油化工股份有限公司抚顺石油化工研究院,辽宁抚顺113001

出　　处：《当代化工》2010年第2期120-122,125,共4页Contemporary Chemical Industry

摘　　要：在全自动化学吸附仪上,用程序升温硫化(TPS)技术对一种体相加氢脱硫催化剂进行表征,考察了金属与载体的相互作用、金属间的相互作用以及焙烧温度对这种催化剂硫化性能的影响。结果表明,MoO3负载于Al2O3载体后,硫化峰温大幅降低,并在TPS谱图中体现出分步硫化的过程,证明MoO3与载体间存在相互作用,形成了易于硫化还原的活性中心。当Mo和Ni共同作用于载体时,形成了更易于硫化的Mo-Ni-O复合相。Co的加入加强了Mo与Ni间的协同作用,Co、Mo、Ni与Al形成了更易硫化的活性中心。W的加入反而改变了硫化中心的性质,使硫化温度提高。对(Mo+Ni)/Al2O3和(Co+Mo+Ni)/Al2O3催化剂,于500℃焙烧时,催化剂硫化性能最好。最后得出结论:当Co、Mo、Ni 3种金属共同作用于载体,并于500℃焙烧时,其硫化中心活性最高。A series of bulk HDS catalysts were characterized by temperature-programmed-sulfiding（TPS）in automatic chemisorption instrument.The influences of calcination temperature,interaction between metals,metal andsurport on sulfiding performance were investigated.The results showed that ：when MoO3 was supported on Al2O3,the sulfiding peak temperature was reduced largely and the process of sulfiding became step by step,which proved that the interaction between MoO3 and Al2O3 formed a easy-to-sulfide sites.A more easy-to-sulfide Mo-Ni-O composite phase was formed when Mo and Ni were supported on Al2O3 jointly.The participation of Co made the synergy between Mo and Ni firmly.Co-Mo-Ni/Al formed a more easy-to-sulfide sites than that of Mo-Ni/Al.The nature of sulfiding sites was changed and the sulfiding peak temperature increased when W was jointed in Co-Mo-Ni/Al2O3（.Mo＋Ni）/Al2O3 and（Co＋Mo＋Ni/Al2O3 catalysts gained the best sulfiding performance when they were calcinated at 500 ℃.The final conclusion was obtained that the sulfiding sites had the highest activities when Co,Mo and Ni were supported on Al2O3 under the calcinations temperature of 500 ℃.

关 键 词：体相加氢脱硫催化剂 程序升温硫化 相互作用 焙烧温度 硫化活性 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]