| Issue |
Korean Journal of Chemical Engineering,
Vol.9, No.1, 45-48, 1992
Vol.9, No.1, 45-48, 1992
TREATMENT OF EXHAUST GASES FROM A METHANOL FUELED VEHICLE OVER PEROVSKITE OXIDE CATALYSTS
As a study on the treatment of exhaust gases from a methanol-fueled vehicle, catalytic oxidation of formaldehyde and methanol on perovskite-type oxides was performed. La0.8Sr0.2MnO3, La0.8Sr0.2CoO3, YBa2Cu3O7(superconductor), and ErBa2Cu3O7(superconductor) were used as catalysts. La-based catalysts were prepared by a citrate method and calcined at 650℃, 800℃, and 900℃, respectively. The catalytic activity of La-based catalysts increased with the increase in the surface area that was dependent on the calcination temperature. Superconductive oxides were also prepared by a citrate method and calcined at 920℃. The catalytic activity of ErBa2Cu3O7 was found to be better than that of YBa2Cu3O7. For La-based perovskite calcined at 650℃, the catalytic activity of La0.8Sr0.2MnO3 was higher than La0.8Sr0.2CoO3. Calcining at 800℃ and 900℃, however, the catalytic activity of La0.8Sr0.2CoO3 was higher than La0.8Sr0.2MnO3.
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