助剂SiO_2对CoMo/Al2O3-SiO_2催化剂结构的影响研究  

Effect of silica promoter on the structure of CoMo/Al_2O_3-SiO_2 catalysts

作　　者：卜岩[1] 赵国利[1] 王少军[1] 凌凤香[1] 张成[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：《燃料化学学报》2016年第4期463-469,共7页Journal of Fuel Chemistry and Technology

摘　　要：采用原位红外光谱、拉曼光谱、紫外光谱和H2-TPR表征技术对CoMo/Al_2O_3-SiO_2催化剂进行了表征。结果表明,增加CoMo/Al_2O_3-SiO_2催化剂中的SiO_2含量会促进八面体配位钼物种向四面体配位钼物种转变,SiO_2含量越高这种结构转变趋势越显著。在CoMo/Al_2O_3催化剂载体中加入适量的SiO_2能够改变载体与活性金属的相互作用,提高了催化剂加氢脱硫活性。The characterization of a series of CoMo/ Al2O3-SiO2 catalysts with different SiO2 contents were studied using in-situ FT-IR,Raman,UV-Vis and H2-TPR techniques. The results showthat the increase of the silica component in CoMo/ Al2O3-SiO2 catalysts can promote the transformation of octahedral molybdenum species into tetrahedral molybdenum species,and the higher SiO2 content can contribute to the transformation.Proper amount of silica component in the mixed supports can alter the interaction between the support and the active metals,resulting in higher hydrodesulfurization（ HDS） activity of CoMo/ Al2O3-SiO2 catalysts.

关 键 词：CoMo/Al2O3-SiO2 原位红外光谱 CO吸附 硫化 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]