On the role of additives to platinum catalysts for reforming reactions

被引：29

作者：

Fukunaga, T ^{[1
]}

Ponec, V ^{[1
]}

机构：

[1] LEIDEN UNIV,LEIDEN INST CHEM,GORLAEUS LABS,NL-2300 RA LEIDEN,NETHERLANDS

来源：

APPLIED CATALYSIS A-GENERAL | 1997年 / 154卷 / 1-2期

关键词：

platinum; hexane aromatization; cyclohexane dehydrogenation; potassium; magnesium; ring closure;

D O I：

10.1016/S0926-860X(96)00374-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of various additives to platinum catalysts has been compared under standard reaction conditions at which aromatization of n-hexane occurs. With the same catalysts, (Pt/SiO2, Pt-K+/SiO2, Pt-Mg2+/SiO2, Pt-KL zeolite, Pt-Mg2+-KL-zeolite, Pt/Al2O3, Pt-K+/Al2O3) dehydrogenation of cyclohexane to benzene has also been monitored. It has been established that the presence of K+- or Mg2+- additives can enhance the aromatization activity, but the condition is that the additive-free catalyst is monofunctional. A discussion of the data presented together with the relevant pieces of information from the literature leads to a conclusion that the effect of K+ or Mg2+ is of electrostatic nature, influencing the ring-closure.

引用

页码：207 / 219

页数：13