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Title: Vehicular pollution control- removal of carbon monoxide through catalytic converters
Authors: Garg, Anurag
Chand, Shri
Issue Date: May-2001
Publisher: NISCAIR-CSIR, India
Abstract: In an attempt to find a substitute to noble-metal based catalysts in the catalytic converters for the removal of CO from automotive exhaust, non-noble metal based catalysts of perovskite based oxides were tested. Perovskites of the structure ABO3, where A cation had La, Ba or Ca and B cation had Co or Fe were used for the reaction. Substituted perovskite of the form A1-xA'xBO3, where A' was Ce metal, was also used. The perovskite catalyst were tested in unsupported as well as supported forms. The supports used were zirconia, ceria or a mixture of the two in different proportions. The results indicate that among the unsupported catalysts, LaCoO3 is the best. Among the substituted catalysts, La0.3Ce0.7CoO3 gave the best performance showing 100% CO conversion at 200°C. The support, zirconia (20%) and ceria (80%) mixture was found to be the best combination. The durability runs up to 6 h show the activity pattern in the order: La0.3Ce0.7CoO3 > La0.6Ce0.4CoO3 >LaCoO3.
Page(s): 219-222
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.08(3) [May 2001]

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