LIQUID-PHASE HYDROGENATION OF 1-ALKENES OVER RH/ALPO4 AND RH/SEPIOLITE CATALYSTS

被引：7

作者：

CABELLO, JA ^{[1
]}

CAMPELO, JM ^{[1
]}

GARCIA, A ^{[1
]}

LUNA, D ^{[1
]}

MARINAS, JM ^{[1
]}

机构：

[1] CORDOBA UNIV,DEPT ORGAN CHEM,E-14004 CORDOBA,SPAIN

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1993年 / 78卷 / 02期

关键词：

D O I：

10.1016/0304-5102(93)85043-S

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 catalytic activity of Rh (1 wt.%) catalysts supported on AlPO4 and sepiolite has been studied in the liquid-phase hydrogenation of linear 1-alkenes. The reaction orders with respect to 1-alkene concentration are negative but are first order with respect to hydrogen, indicating that 1-alkene adsorbs very strongly on Rh sites and alkene and H-2 compete for adsorption sites on the surface. The initial hydrogenation rates increase in the order 1-hexene < 1-heptene < 1-octene, and furthermore, on going from 1-hexene to 1-octene the steric effects (through DELTAS(not-equal)) are activating, while electronic effects (from DELTAH(not-equal)) deactivate the reaction process. A cis-concerted mechanism taking place in a single step on a Rh site with three coordinative unsaturations which can simultaneously adsorb hydrogen and a pi-bonded alkene is suggested.

引用

页码：249 / 256

页数：8

共 23 条

[1] A FACILE TECHNIQUE FOR THE SURFACE CHARACTERIZATION OF DISPERSED METAL-CATALYSTS [J].