Role of steam in partial oxidation of propylene over a Pd/SDB catalyst

Citation
Eh. Xie et al., Role of steam in partial oxidation of propylene over a Pd/SDB catalyst, APP CATAL A, 220(1-2), 2001, pp. 215-221
Citations number
13
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926860X → ACNP
Volume
220
Issue
1-2
Year of publication
2001
Pages
215 - 221
Database
ISI
SICI code
0926-860X(20011025)220:1-2<215:ROSIPO>2.0.ZU;2-B
Abstract
Step-response studies of propylene partial oxidation with oxygen over a hyd rophobic Pd/SDB catalyst were conducted at 1000 kPa and 185 degreesC in a f ixed-bed reactor. CO2 was found to be the only oxidation product when the f eed contained only propylene and oxygen. CO2 formation was significantly su ppressed by addition of steam to the feed, and this addition leads to the f ormation of partial oxidation products: acrolein and acrylic acid. A compet itive reaction mechanism involving water molecules is proposed to explain t he significant influence of steam concentration on the rate of propylene ox idation and product selectivity. (C) 2001 Elsevier Science B.V. All rights reserved.