Mechanism of propylene oxidation over bismuth molybdate revealed by transient response method--1. An intermediate in the complete oxidation of C/sub 3/H/sub 6/

Journal Article · Mon Jan 01 00:00:00 EST 1979 · J. Catal.; (United States)

OSTI ID:7138722

Kobayashi, M; Futaya, R

An intermediate in the complete oxidation of C/sub 3/H/sub 6/ and its nature were deduced from transient response studies of a flow reactor system with a 1:1 bismuth-molybdenum catalyst at temperatures below ordinary operating temperatures. The formation of a stable surface intermediate with a non-allylic structure resembling that of propylene on every site of the catalyst surface occurred at 310/sup 0/C in the presence of propylene/oxygen or acrolein/oxygen; under oxidative conditions at 310/sup 0/C about eight times more intermediate formed directly from propylene than from adsorbed acrolein. The intermediate reacted with weakly adsorbed oxygen from the gas phase, but not with lattice oxygen, to decompose into CO/sub 2/; in temperature programed desorption studies (2.3/sup 0/C/min) it desorbed as CO/sub 2/ into a stream of helium above 220/sup 0/C (peak at 420/sup 0/C), apparently by reaction with oxygen diffused from the bulk to the surface.

• Research Organization: Kitami Inst. Technol.
• OSTI ID: 7138722
• Journal Information: J. Catal.; (United States), Vol. 56:1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BISMUTH COMPOUNDS
CATALYTIC EFFECTS
SURFACE PROPERTIES
CATALYSTS
MOLYBDATES
PROPYLENE
OXIDATION
CHEMICAL REACTION KINETICS
HIGH TEMPERATURE
REACTION INTERMEDIATES
TEMPERATURE EFFECTS
ALKENES
CHEMICAL REACTIONS
HYDROCARBONS
KINETICS
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
TRANSITION ELEMENT COMPOUNDS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties