金属含量对Ni-Mo/Y-β加氢裂化性能的影响  

Influence of metal loadings on hydrocracking behaviors of Ni-Mo/Y-β

作　　者：金昌磊[1] 马波[1] 张喜文[2] 凌凤香[2] 张志智[2] 秦波[2] 

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《工业催化》2008年第4期30-34,共5页Industrial Catalysis

基　　金：中国石油化工股份有限公司资助项目(090701)

摘　　要：以双微孔复合分子筛Y-β为载体,制备金属含量不同的Ni-Mo/Y-β双功能催化剂,探讨金属含量对Ni-Mo/Y-β催化剂物化性能的影响。实验表明,随着金属含量的增加,催化剂相对结晶度降低,催化剂比表面积和孔容逐渐减小,表面B酸明显减少,而L酸基本不变。在固定床反应器上考察了对正辛烷加氢裂化反应的催化性能,在其他操作条件相同、Mo质量分数为8%和Ni质量分数为2.4%时,正辛烷的加氢裂化转化率和裂解率最高;当Mo质量分数≥16%、Ni质量分数≥4.8%时,对裂化产物i-C4和i-C5的选择性最高。Bifunctional Ni-Mo/Y-13 catalysts with different bimetal loadings carried on bimicroporous composite zeolite Y-13 were prepared. Physicochemical properties of the catalysts with different bimetal loadings were studied. Characterization results showed that the crystallinity, BET surface area, pore volume and Br^nsted acid sites decreased as bimetal loadings increased, while the Lewis acid sites kept unchanged. Behaviors of the catalysts for hydrocracking of n-octane were investigated in a fixed bed stain- less steel tubular reactor. Optimal conversion and hydrocracking rate of n-octane were obtained at Mo and Ni loadings Mo and Ni of 8% and 2.4%, respectively. Optimal selectivity to i-butane and i-pentane was obtained at loadings of 16% and 4.8%, respectively.

关 键 词：催化剂工程 双微孔复合分子筛 Ni-Mo/Y-B催化剂 正辛烷加氢裂化 

分 类 号：TQ426.95[化学工程] TE624.41[石油与天然气工程—油气加工工程]