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N2O Decomposition Characteristics of Dual Bed Mixed Metal Oxide Catalytic System using Partial Oxidation of Methane  

Lee, Nan Young (Department of Industrial Chemistry, Sangmyung University)
Woo, Je-Wan (Department of Industrial Chemistry, Sangmyung University)
Publication Information
Korean Chemical Engineering Research / v.46, no.1, 2008 , pp. 82-87 More about this Journal
Abstract
$N_2O$ decomposition characteristics of dual bed mixed metal oxide catalytic system was investigated. The partial oxidation of methane at first reactor of dual bed catalytic system was performed over Co-Rh-Al (1/0.2/1) catalyst under the optimized condition of $8,000h^{-1}$ GHSV, gas ratio ($CH_4:O_2=5:1$) at $500^{\circ}C$. In the dual bed system investigated herein, the second catalyst bed was employed for the $N_2O$ decomposition using product of partial oxidation of methane at first bed. An excellent $N_2O$ conversion activity even at lower temperature ($<250^{\circ}C$) was obtained with Co-Rh-Al (1/0.2/1) or Co-Rh-Zr-Al (1/0.2/0.3/1) catalyst by combining Co-Rh-Al (1/0.2/1) hydrotalcite catalyst for the partial oxidation of methane in a dual-bed system. The $N_2O$ conversion activity is drastically reduced in the presence of oxygen in second bed of a dual-bed system over Co-Rh-Al (1/0.2/1) catalyst at $300^{\circ}C$.
Keywords
$N_2O$ Decomposition; Dual Bed Reactor; Mixed Metal Oxide Catalyst; Hydrotalcite Catalyst;
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