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메틸포메이트의 수소첨가 분해반응에 의한 메탄올 제조
Hydrogenolysis of Methyl Formate to Methanol
HWAHAK KONGHAK, August 1989, 27(4), 396-403(8), NONE
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Abstract
메탄올 제조를 위한 메틸포메이트의 수소첨가 분해반응을 copper chromite 촉매계를 이용하여 연구하였다. 사용된 촉매는 구리-크롬 산화물 중 구리 산화물의 비율이 42-78%인 촉매들이었으며, 반응실험의 변수로는 반응온도, 압력, 물의 영향 등과 촉매의 전처리 조건 변화, 즉 환원조건의 변화 및 환원 정도의 변화에 따른 반응성이 검토되었다. 반응실험 결과 수소압 50bar, 온도 180℃에서 생성물에 대한 선택도는 촉매의 전처리 조건에 관계없이 99% 이상의 값을 얻었으며, 활성도는 운전조건 및 전처리 조건에 크게 영향을 받는 것으로 나타났다. 특히 활성도를 좌우하는 요소는 copper chromite 촉매상의 활성점으로 생각되는 Cu+ 농도로서, XRD 실험을 통해 반응물 및 생서울 조성과 전처리 조건의 변화가 Cu+상태의 구리 농도변화와 밀접한 관련이 있음이 밝혀졌다.
The catalytic hydrogenolysis of methyl formate to methanol was studied. Copper chromite catalysts with 42-78wt% of copper oxide content were used. The selectivities and activities of the catalysts were measured as a function of reaction temperature, pressure, amounts of water content, and preteatment conditions of catalysts such as reduction temperatures and reduction time. The selectivity to methanol was always higher than 99% above 50 bar of hydrogen pressure and 180℃. The catalysts was easily deactivated above 180℃. The activity depended greatly upon the reduction states of catalysts. This was believed to be due to the differences in the amounts of Cu+ species in cata-lysts, known to be an active species in the reaction. The conclusion was supported by XRD results of the catalysts treated at different conditions.