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KMID : 1059519900340050445
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Journal of the Korean Chemical Society
1990 Volume.34 No. 5 p.445 ~ p.451
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A Study on the Vanadium Oxides Catalyst in the Ammoxidation of Methylpyrazine into Cyanopyrazine
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Kwon Yong-Seung
Park Sang-Eon
Lee Young-Kil
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Abstract
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The catalytic ammoxidation of methylpyrazine into cyanopyrazine over a supported vanadium oxides catalyst on γ-alumina was studied in a continuous-flow fixed bed reactor. Various crystalline phases of vanadium oxides were obtained depending on reduction temperatures. And also the activities for the reaction of methylpyrazine into cyanopyrazine were affected by their major oxidation states of the corresponding crystalline phases. The 10% vanadium oxides loaded γ-alumina catalyst, which was reduced at 600℃ under the hydrogen flow for 2 hours, showed the highest activity and the highest selectivity on cyanopyrazine in the ammoxidation of methylpyrazine.Its major crystalline phase was V2O3 with the presence of V6O13 and V2O4(V2O) together. And this coexistance seemed to enhance the activity.
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KEYWORD
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