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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 34, Number 5
JKCSEZ 34(5)
October 20, 1990 

A Study on the Vanadium Oxides Catalyst in the Ammoxidation of Methylpyrazine into Cyanopyrazine

메틸피라진으로부터 시아노피라진으로의 암옥시화반응에서의 산화 바나듐 촉매에 관한 연구
Yong Seung Kwon, Sang-Eon Park, Young K. Lee

권용승, 박상언, 이영길
산화 바나듐(V2O3)이 알루미나에 담지된 촉매상에서 메틸피라진으로부터 시아노피라진으로의 암옥시화반응(Ammoxidation)을 연속흐름식 고정층 반응기에서 조사하였다. 알루미나에 담지된 산화 바나듐은 전처리의 환원온도에 따라 다양한 산화상태의 결정상을 형성하며, 이들 바나듐 산화물의 산화상태의 변화는 메틸피리진으로부터 시아노피라진으로의 반응활성에 영향을 준다. 알루미나에 10% 산화 바나듐이 담지된 촉매를 600℃ 수소기류하에서 2시간 환원처리하여 바나듐의 산화상태가 V3+에 가까운, 즉 촉매상의 바나듐의 주된 결정상이 V2O3이며 V6O13 및 V2O4(V2O)가 공존할 때 메틸피라진으로부터 시아노피라진으로의 암옥시화반응에 최적의 반응활성과 선택도를 갖는 것으로 나타났다.

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.

445 - 451
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