1LG-8 메탄올 합성 촉매의 활성에 미치는 하이드로탈사이트 구조의 영향

다국어 초록 (Multilingual Abstract)

The structural and chemical identities of Cu/ZnO and Cu/ZnO/Al₂O₃ for methanol synthesis have been recently understood in a sophisticated manner. These catalysts have been generally prepared by coprecipitation including multiple steps in each of which small change of a parameter influences physicochemical property and catalytic performance. The major phase for an active Cu/ZnO-based catalyst is zincian malachite obtained by substitution of Cu²⁺ in malachite by Zn²⁺. In Cu/ZnO/Al₂O₃ catalysts, incorporation of Al³⁺ (up to ca. 3.3%) with Zn2+ is possible. However, when prepared with high Al concentrations, hydrotalcite (HT) phase is developed, which is known to be detrimental to methanol synthesis activity. In this talk, several approaches will be introduced to tune the composition of HT phase in Cu/ZnO-based catalyst systems.