E!ects of the radial distribution of platinum in spherical alumina catalysts on the oxidation of CO in air
Journal article, 2000

The oxidation of CO in air has been studied using spherical alumina pellets with varying radial platinum distributions. Shell and homogeneous catalysts have bi on prepared with the same total amount of platinum. Go-impregnation of chloroplatinic acid and citric acid was used to obtain the homogeneous distribution. Temperature ramp experiments in a flow reactor showed significant differences in light-off behavior for the two catalysts. Compared to the shell catalyst, the conversion of CO started at lower temperatures when using the homogeneous catalyst, but higher temperatures were needed for total conversion. Steady-stale experiments performed in a micro Berty tank reactor with the homogeneous catalyst were used to derive two different kinetic models for the oxidation. One of the kinetic expressions was used to simulate the catalytic activity in a steady-state flow reactor system. The maximum temperature gain which can be achieved by placing the active material at the optimum position in the pellet, in comparison to an infinitesimal shell distribution, was found to be 48 degreesC at 95% conversion for 1.0% CO.

CO oxidation



Berty tank reactor

mass transfer



Astrid Drewsen

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Competence Centre for Catalysis (KCK)

Anna Ljungqvist

Magnus Skoglundh

Chalmers, Chemical and Biological Engineering, Applied Surface Chemistry

Competence Centre for Catalysis (KCK)

Bengt Andersson

Competence Centre for Catalysis (KCK)

Chalmers, Chemical and Biological Engineering, Chemical Reaction Engineering

Chemical Engineering Sciences

0009-2509 (ISSN)

Vol. 55 4939-4951

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)



Materials Science

Subject Categories

Physical Chemistry

Chemical Engineering

Other Chemistry Topics



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