摘要
采用P对NiMo/γ-Al2O3硫化物催化剂进行改性,研究P与金属组分浸渍次序对催化剂结构和硫醚化性能的影响。结果表明,P改性通过抑制金属组分与γ-Al2O3间相互作用促进金属组分硫化、增加催化剂表面金属位数量,同时P改性也提高了催化剂表面酸量。P改性前后硫化物催化剂中均形成了Ni3S2物相,但未检测到MoS2物相。先浸渍及后浸渍P组分均提高了催化剂硫醚化性能;P物种和金属组分共浸渍制备催化剂利于异戊二烯选择加氢生成异戊烯。此外,P改性催化剂酸量增加促进了烯烃聚合。总体而言,先浸渍Ni-Mo组分后浸渍P组分所制备的硫化物催化剂性能较佳。
The P modified Ni-Mo/γ-Al2O3 sulfide catalysts were prepared for thioetherification,and the effect of the impregnation sequence of P and metal components on the catalyst structure and performance was investigated.P modification promoted the sulfuration of metal components because the interaction between metal components andγ-Al2O3 was reduced,and consequently the exposed metal sites were increased.Also,the P modification increased the acid amount of the catalyst.Ni3S2 phase formed in all the sulfide catalysts modified with P or not,while no MoS2 phase was detected.The catalysts prepared by the consecutive impregnation method gave higher activity for thioetherification than that prepared by the co-impregnation method,especially the P-NiMo sulfide catalyst where the P species were impregnated ontoγ-Al2O3 prior to the Ni-Mo ones.However,the co-impregnation method led to higher activity for the conversion of isoprene.Additionally,P modification enhanced the catalyst activity for the olefin polymerization due to the increase of the acid amount.In all,the sulfide catalyst prepared by impregnating the Ni-Mo components prior to the P ones showed better performance than the others.
作者
李风旭
李明丰
褚阳
陈吉祥
Li Fengxu;Li Mingfeng;Chu Yang;Chen Jixiang(Tianjin Key Laboratory of Applied Catalysis Science and Technology,Department of Catalysis Science and Engineering,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;SINOPEC Research Institute of Petroleum Processing,Beijing 100083,China)
出处
《工业催化》
CAS
2020年第7期36-41,共6页
Industrial Catalysis
基金
石油化工催化材料与反应工程国家重点实验室(中国石油化工股份有限公司石油化工科学研究院)开放基金。
关键词
催化剂工程
NiMo硫化物
磷改性
硫醚化
选择加氢
catalyst engineering
NiMo sulfide
phosphorous modification
thioetherification
selective hydrogenation
