Oxidative dehydrogenation of methanol to formaldehyde on electrolytic silver catalyst modified with iodides

被引：34

作者：

Dai, WL ^{[1
]}

Liu, Q ^{[1
]}

Cao, Y ^{[1
]}

Deng, JF ^{[1
]}

机构：

[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 1998年 / 175卷 / 1-2期

关键词：

modifier; oxidative dehydrogenation; formaldehyde; electrolytic silver catalyst; iodide;

D O I：

10.1016/S0926-860X(98)00203-8

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：

Iodides, especially CH3I, were used as modifiers in the oxidative dehydrogenation of methanol to formaldehyde over electrolytic silver catalyst. The yield of formaldehyde was as high as 93% at 98% conversion of CH3OH for the I-modified catalyst, while it was only 85% at 94% conversion without I-modification. The optimum reaction conditions were determined and the interaction between the silver surface and the iodide additive was investigated by means of XPS and SEM. The chemisorbed iodine atoms on the silver surface caused a decrease of the surface concentration of atomic oxygen species and prevented the complete oxidation of CH3OH to CO2. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：83 / 88

页数：6

共 15 条

[1]

AICHER A, 1990, Patent No. 467169

[2]

BAO XH, 1986, ACTA CHIM SINICA, V44, P619

[3]

BARTERN MA, 1982, CHEM PHYSICS SOLID S, V4, P139

[4]

DENG JF, 1980, PETROCHEM TECHNOL, V9, P523

[5]

FLIOL RM, 1980, KHIM PROM ST, V10, P589

[6]

GRAF F, 1988, Patent No. 3643469

[7]

John FMoulder., 1992, Handbook of X-ray photoelectron spectroscopy: a reference book of standard spectra for identification and interpretation of XPS data

[8]

LAZARESCU V, 1987, HETERG CATAL 1, P265

[9]

MAROCHNIK LS, 1989, SOV SCI REV E ASTROP, V8, P1

[10]

NETH BV, 1987, Patent No. 8502991

← 1 2 →