Development of Silicalite-1 Encapsulated Cu-Zno Catalysts for Methanol Synthesis by Co Hydrogenation
SSRN, ISSN: 1556-5068
2023
- 163Usage
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Article Description
In recent years, there has been an urgent need to develop technologies for CO emission reduction and effective CO utilization. As one of such technologies, methanol synthesis from CO using highly active catalysts has attracted attention. Cu-ZnO-based catalysts are promising candidates for this reaction, and methanol is selectively produced especially on the Cu-ZnO interface. However, because Cu is thermally unstable, the Cu-ZnO interface is decreased during thermal aggregation of Cu. In this study, we developed a catalyst with Cu particles immobilized within Silicalite-1 (denoted as S-1) particles. The catalyst preparation method using Cu phyllosilicate (denoted as CuPS) as the Cu source was applied to yield CuPS@S-1, in which CuPS was immobilized within S-1 particles, and the size of Cu particles after reduction was approximately 2.4 nm (Cu@S-1). The Cu@S-1 exhibited higher CO hydrogenation activity and methanol selectivity than Cu/S-1 prepared by the impregnation method. In order to further improve the methanol production activity, ZnO loading onto Cu@S-1 was examined to form Cu-ZnO interface. ZnO/Cu@S-1 was obtained by impregnation of CuPS@S-1 powder with an ethanol solution containing zinc acetate, followed by calcination and reduction. The ZnO/Cu@S-1 exhibited improved methanol production ability, and the space time yield for methanol based on Cu weight reached to above 1200 mgmethanol gCu h
Bibliographic Details
Elsevier BV
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