摘要
采用Hβ沸石为载体,以Ni为主剂,分别以P、Mg、La为助剂合成了FCC汽油加氢改质双功能催化剂。考察了采用不同热处理方式脱模板剂对Naβ沸石载体的影响,以及助剂种类和助剂含量对双功能催化剂性能的影响。结果表明,采用阶段焙烧法脱模板剂可以有效的抑制分子筛脱铝,更好的保持分子筛原始结晶态和比表面积;在FCC汽油加氢改质反应中,加入0.25%磷改性后的Ni P β催化剂,有效的降低了汽油中的烯烃含量,使烯烃转化率达到65%,并保证汽油的辛烷值基本不降低。
Bifunctional catalysts for FCC gasoline hydroupgrading were synthesized using Hβ as support, Ni as the active component and P, Mg and La as promotor respectively in this experiment. Effects of different calcining methods to eliminate template agent on Naβ carrier were studied. Effects of species and content of auxiliary on the properties of the catalysts were studied. The results showed that stage-by-stage calcination could prevent effectively the molecular sieves from eliminating aluminum and keep well the original crystallites and the specific surface area. In the reaction of FCC gasoline hydroupgrading, alkene content of gasoline can be decreased effectively and conversion of alkene can reach 65% using Ni-β catalysts modified with P (mass percent: 0.25%). At the same time, it can also ensure basically octane number not reduced.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2004年第3期367-371,共5页
Journal of Fuel Chemistry and Technology
关键词
模板剂
HΒ沸石
FCC汽油
辛烷值
加氢改质
template agent
Hβ zeolite
FCC gasoline
octane number
hydroupgrading
