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이산화탄소의 수소화반응에 의한 메탄올 합성
Methanol Synthesis by the Hydrogenation of Carbon Dioxide
HWAHAK KONGHAK, December 1996, 34(6), 716-720(5), NONE
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Abstract
Cu/MgO, Cu/ZnO, Cu/ZnO/Al2O3 및 Au/TiO2와 Cu/ZnO/Al2O3 연합촉매 상에서 이산화탄소의 수소화반응에 의하여 메탄올을 합성하였다. 반응조건은 160-250℃, H2/CO2 =3 및 25bar였으며 고정층 반응기를 이용하였다. 본 연구에서 사용한 촉매중 Cu/ZnO/Al2O3가 최고로 활성이 좋았다. Au/TiO2와 Cu/ZnO/Al2O3 촉매를 series로 연결하여 실험한 결과 Cu/ZnO/Al2O3 촉매만 사용한 경우보다 약 16% 정도의 메탄올 선택도 향상을 얻을 수 있었다. Cu/ZnO/Al2O3 촉매의 반응 전 . 후 XRD실험을 통해서 본 촉매계의 활성점으로 알려져 있는 Cu+ site는 발견할 수 없었고 다만 Cu는 금속상태로만 관찰되었다.
Methanol synthesis through the hydrogenation of CO2 was investigated over Cu/MgO, Cu/ZnO, Cu/ZnO/Al2O3, and Cu/ZnO/Al2O3 combined with Au/TiO2 catalysts at 160-250℃, H2/ CO2=3, 25bar, and in packed-bed reactor. Among the catalysts used, Cu/ZnO/Al2O3 showed the highest catalytic activity. The combination of Au/TiO2 and Cu/ZnO/Al2O3 catalysts in series increased the methanol selectivity to about 16%. With the XRD result, Cu+ site which has been known as an active site of the Cu/ZnO/Al2O3 catalyst system was not observed, whereas only XRD peak for Cu was observed.
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References
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