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지르코니아 촉매의 CO 수소화반응 특성 및 물의 영향
CO Hydrogenation and Effects of Water over Zirconia Catalyst
HWAHAK KONGHAK, June 1993, 31(3), 346-351(6), NONE
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Abstract
침전법으로 지르코니아를 제조하여 CO 수소화반응 특성과 메탄올 합성에 미치는 물의 영향에 대해 연구하였다. CO 수소화반응에서는 탄화수소와 메탄올, 디메틸에테르가 생성되는 것으로 나타났으며, 부텐에 대해 높은 선택도를 보여주었다. 물은 메탄올 합성에 매우 중요한 역할을 하는데, 반응전에 흡착된 물은 탄화수소의 생성을 촉진시키지만 메탄올 생성을 억제한다. 그러나 반응물에 첨가된 물은 메탄올 합성에 참여하며, 촉매표면에 OH기를 계속 제공하여 반응활성을 증가시킨다.
Zirconia catalyst was prepared by precipitation method, and the CO hydrogenation and the effects of water on the methanol synthesis were studied. Zirconia exhibited a high selectivity toward butenes and produced hydrocarbons, methanol and dimethyl ether. Water appeared to play an important role in the methanol synthesis. Preadsorbed water promoted the formation of hydrocarbons but inhibited the methanol synthesis. When water was added to the reactant, however, it resulted in increased rates of methanol and hydrocarbon generation. Water is believed to participate in the methanol synthesis and to replenish surface OH groups.
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