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몰리브데나-알루미나촉매의 세슘첨가효과(II)

Effect of Cesium-additives on Molybdena-Alumina Catalyst(II)

HWAHAK KONGHAK, October 1986, 24(5), 391-398(8), NONE
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Abstract

Molybdena-alumina촉매의 세슘첨가효과를 조사하기 위해 피리딘의 승온탈착 및 이소프로필 알코올의 승온분해반응을 수행 하였다.
피리딘의 탈착활성화에너지는 소량의 세슘(Cs/Mo=0.41)이 첨가되었을 때 증가하였고, 그 이상의 범위에서는 세슘량에 거의 무관하였다. 이소프로필 알코올 승온분해반응결과는 피리딘의 승온탈착 실험결과를 뒷받침해 주는 동시에 세슘첨가가 이소프로필 알코올 분해반응의 속도지배단계를 변화시키지 못하고 오직 반응성에만 관여함을 알려주었다.
이러한 모든 실험결과는 몰리브데나-알루미나촉매의 표면모델에 입각한 촉매의 산특성의 측면에서 해석한 결과, 좋은 일치를 보였다.
The effect of cesium-additives on molybdena-alumina catalyst has been studied using temperature-programmed desorption(TPD) of pyridine and temperature-programmed desorption with decomposition (TPDE) of isopropyl alcohol.
The desorption energy of pyridine was increased significantly with the addition of small amount of cesium (ca. Cs/Mo=0.41) and was nearly constant thereafter. The result of TPDE study supported the above phenomena and showed that presence of cesium does not lead to change the rate-determining steps in isopropyl alcohol-decomposition reaction.
These results are consistent with the surface model of molybdena-alumina catalyst.

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