DIFFERING CHARACTERISTICS OF CU AND ZNO IN DEHYDROGENATION OF ETHANOL - A DEUTERIUM-EXCHANGE STUDY

被引：23

作者：

CHUNG, MJ

HAN, SH

PARK, KY

IHM, SK

机构：

[1] KOREA ADV INST SCI & TECHNOL,POB 131,SEOUL 131,SOUTH KOREA

[2] KOREA ADV INST SCI & TECHNOL,DEPT CHEM ENGN,TAEJON 305701,SOUTH KOREA

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1993年 / 79卷 / 1-3期

关键词：

ACETALDEHYDE; COPPER; DEHYDROGENATION; DEUTERIUM EXCHANGE; ETHANOL; ZINC OXIDE;

D O I：

10.1016/0304-5102(93)85113-8

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：

Direct evidence for the differing characteristics of Cu and ZnO in the dehydrogenation of ethanol were provided through the deuterium exchange reaction of ethanol and acetaldehyde. Deuterium was mainly exchanged at the alpha-carbon of ethanol and acetaldehyde on Cu catalyst. On the other hand, deuterium was mainly exchanged at the beta-carbon on ZnO catalyst. More deuterium atoms were exchanged with D2 than with D2O on Cu catalyst, but the reverse results were obtained on ZnO catalyst. Beta-Elimination type reaction mechanisms are suggested for the dehydrogenation of ethanol, and a beta-carbanionic intermediate was proposed for the dehydrogenation of acetaldehyde.

引用

页码：335 / 345

页数：11

共 13 条

[1] TEMPERATURE-PROGRAMMED REACTION STUDIES OF THE INTERACTION OF METHYL FORMATE AND ETHANOL WITH POLYCRYSTALLINE ZINC-OXIDE [J].