Development of base metal oxide catalyst for automotive emission control

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Document Type

Article

Source Title

Korean Journal of Chemical Engineering

Volume

15

Issue

5

First Page

480

Last Page

485

Publication Date

1998

Abstract

Activity of 'alumina was tested for CO and hydrocarbon oxidation using the flow reactor system. The mechanism of the CO oxidation was elucidated by isotopic tracer technique using a closed circulation system. CO ox- idation was found to proceed via the formation of a carbonate type of intermediate species. Water enhances the CO ox- idation and CO2 retards alumina activity. Carbon deposition was also investigated during CO oxidation on alumina. Carbon formed was found to act as an in-sire active site that promoted CO oxidation. Results obtained showed alu- mina to be promising for CO oxidation. Pb showed opposite effects on CO and hydrocarbon reactions. Hydrocarbon reactivity test conducted showed that methanol is the most reactive on alumina giving 100 % conversion at 500~ However, carbon deposited affected the formation of several products at this temperature. Further study on methanol oxidation using alkaline treated alumina showed better performance for auto emission control. CeO> known to have an oxygen storage capacity, was tested as an additive to alumina for methanol oxidation and propylene oxidation. Results proved that CeO2-Al203 gave much higher activity for CO oxidation, methanol oxidation, and pmpylene oxidation than alumina.

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Digitial Object Identifier (DOI)

10.1007/BF02707095

Disciplines

Chemical Engineering

Keywords

Aluminum oxide; Cerium oxides; Automobiles—Motors—Exhaust gas

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