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제올라이트에 포획된 Rhodium Carbonyl Clusters
Zelite-entrapped Rhodium Carbonyl Clusters
HWAHAK KONGHAK, December 1991, 29(6), 701-708(8), NONE
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Abstract
제올라이트에 포획된 rhodium carbonyl clusters를 NaN3로 처리된 염기성 제올라이트 Y의 세공내부에 흡착한[Rh(CO)2(acac)]으로부터 제조하였다. 강한 염기성 제올라이트에 포획된 rhodium carbonyl clusters가 형성 되었으며 그 촉매는 CO 수소화반응에 활성을 가지며 저분자 올레핀과 메탄올을 선택적으로 합성하였다. 촉매는 300℃, 20 기압, H2/CO 몰비 1의 조건에서 2주일 이상 활성도와 선택도의 현저한 감소없이 안정하였다. 촉매의 활성성분은 제올라이트의 cages 내부에 포획된 rhodium carbonyl clusters로 추정된다.
Zeolite-entrapped rhodium carbonyl clusters were prepared by converting adsorbed[Rh(CO)2-(acac)]in the pores of zeolite Y made basic by treatment with NaN3. In a strongly basic zeolite, entrapped rhodium carbonyl clusters were formed, and the catalyst was active for CO hydrogenation and selective for low-molecular-weight olefins and methanol. The catalyst was stable, operating at 300℃ and 20atm with H2/CO molar ratio 1 for more than two weeks with no significant loss in activity and selectivity. The catalytical-ly active species are suggested to be rhodium carbonyl clusters trapped in the zeolite cages.
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Gelin P, BenTaarit Y, Naccache C, J. Catal., 59, 357 (1979)
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