钼含量对MoO_3-ZrO_2结构及异构化性能的影响  

Effects of Mo content on the structure and isomerization performance of MoO_3-ZrO_2

作　　者：刘晓丹[1] 张维[1] 白英芝[1,2] 王海彦[1,2] 魏民[1] 齐振东[1] 喻艇 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [2]中国石油大学(华东)化学化工学院,山东青岛266555

出　　处：《应用化工》2015年第8期1499-1502,共4页Applied Chemical Industry

摘　　要：采用水热一步法合成了复合型Mo O3-Zr O2固体超强酸,运用X射线衍射(XRD)、N2吸附脱附(BET)、红外光谱(FTIR)和扫描电镜(SEM)对催化剂进行表征,研究Mo O3质量分数对Mo O3-Zr O2结构的影响。以正己烷为原料在小型固定床反应器上考察Mo O3-Zr O2催化剂的异构化性能。结果表明,Mo O3的引入促进了Zr O2由单斜晶相向四方晶相的转变,增加了Mo O3-Zr O2的比表面积。当Mo O3含量为20%时,Mo O3在Zr O2表面达到单层分散,形成了大量的超强酸位,其正己烷的转化率和异构体的收率分别为48.6%和34.1%。MoO3-ZrO2 composite solid super acid was synthesized by hydrothermal one-step method. The MoOa-ZrO2 were characterized by XRD,N2 adsorption-desorption（BET）, FTIR and SEM to research on the influence of MoO3 content on MoO3-ZrO2 structure. The isomerization performance investigation of MoO3-ZrO2 catalyst was＇carried out in a small fixed bed reactor with n-hexane as raw material. The results showed that the introduction of MoO3 promoted the ZrO2 by monoelinic crystal phase into tetragonal phase and increased the specific surface area of MoOa- ZrO2. When the content of MoO3 is 20%, MoO3 reaches to the monolayer dispersion of the surface of ZrO2, there is a large number of super acid forming. The conversion rate of n-hexane and yield of isomer is 48.6% and 34.1% respectively.

关 键 词：MoO3-ZrO2 固体超强酸 MOO3 异构化 

分 类 号：TQ426.82[化学工程]