助剂硅的加入方式对钨镍催化剂的影响  

Impact of ways of addition of silicon on performances of W-Ni hydro-processing catalyst

作　　者：张艳侠[1] 包洪洲[1] 付秋红[1] 段日[1] 乔凯[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,辽宁省抚顺市113001

出　　处：《炼油技术与工程》2013年第9期36-39,共4页Petroleum Refinery Engineering

摘　　要：以两种不同加入硅的方式制备了W-Ni催化剂,对其进行了拉曼光谱、氢气程序升温还原(H2-TPR)、X射线光电子能谱(XPS)等表征,并采用微型反应器进行了活性评价。结果表明,当硅在氧化铝成胶过程中加入、且硅的加入量为基准+11.0时,八面体配位结构的钨比例最大,H2-TPR的低温还原峰温度最低,峰面积最大,镍与载体的结合能最小,催化剂的脱硫和脱氮活性也最高。当硅在载体成型过程中加入时,随着硅含量的增加,催化剂中八面体配位结构的钨比例随之降低,H2-TPR的低温还原峰向高温方向偏移,钨和镍的金属分散度随之下降,钨与载体的结合能随之增大,而镍与载体的结合能却随之降低。催化剂的活性随着硅含量的增加也降低。W-Ni catalysts have been prepared with two different ways of silicon addition.The catalysts were characterized by Raman spectrum,H2-TPR and XPS,etc,and the catalysts＇ activity was evaluated in the micro-reactor.The results showed that,when the silicon was added during gelling of aluminum oxide,the proportion of tungsten in octahedral coordination structure was the highest with the silicon content baseline at ＋ 11.0,the H2-TPR low temperature reduction peak temperature was the lowest,the peak area was the largest,the binding energy of tungsten and carrier was minimum and desulfurization and denitrogenation activities of the catalyst were the highest.When the silicon was added during the carrier formation process,with increasing silicon content,the ratio of tungsten in octahedral coordination structure decreased,H2-TPR low temperature reduction peak shifted to higher temperature,the dispersion of tungsten and nickel were reduced,the binding energy of tungsten and carrier was increased.Therefore,the catalyst activity went down with rising silicon content in the catalyst.

关 键 词：助剂硅 加入方式 H2-TPR 拉曼光谱 催化剂 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]