摘要
采用XRD、BET、IR、SEM、NH3-TPD方法对以无定形Zr(OH)4和已晶化的ZrO2为载体制备的Ni-WO3/ZrO2催化剂进行了表征,考察了载体晶化对催化剂结构、酸性及催化性能的影响。结果表明,载体晶化减弱了W与Zr间的相互作用,抑制了四方相ZrO2的生成,减少了催化剂上强酸中心的数目,从而降低了Pt-WO3/ZrO2催化剂上正庚烷异构化反应活性.
By means of XRD,BET,IR,EM,NH3-TPD techniques,the effect of Zr(OH)4 crystallization on the crystal structure,acidity and the isomerization performance of Ni-WO3/ZrO2 was studied.The results showed that the crystallization of Zr(OH)4 reduced the fraction of tetragonal zirconia.Strong acid sites on the catalyst and the isomerization activity waked with the crystallization of Zr(OH)4.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2012年第2期169-173,共5页
Journal of Molecular Catalysis(China)