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Catalytic Activity of Tandem Catalysts Based on ZnGa2O4 and MFI Zeolite in CO2 Hydrogenation
https://orcid.org/https://orcid.org/0009-0003-5278-6519
https://orcid.org/https://orcid.org/0000-0002-8763-2232
https://orcid.org/https://orcid.org/0000-0001-5032-6381
https://orcid.org/https://orcid.org/0000-0001-8646-3679
https://orcid.org/https://orcid.org/0000-0002-8742-2892
A series of tandem catalysts based on a ZnGa2O4 spinel and on MFI-type acidic components with varying SiO2/Al2O3 ratios were prepared by mechanical mixing at a spinel to MFI weight ratio of 2 : 1. These catalysts were tested in the conversion of carbon dioxide to olefins at 380°C and 27 bar. The hydrogenating component (ZnGa2O4) was prepared by co-precipitation of the corresponding hydroxides followed by heat treatment. The zeolites were synthesized by steam-assisted crystallization. A reference catalyst was prepared from ZnGa2O4 and a hydrothermally synthesized commercial zeolite CBV28014. The physicochemical properties of the catalysts and their components were characterized by low-temperature nitrogen adsorption–desorption, chemical analysis, NH3-TPD, H2-TPR, XRD, and SEM. The sample with the highest SiO2/Al2O3 ratio (250) achieved the highest CO2 conversion; this parameter dropped as the aluminum content in the samples increased. The highest selectivity towards light olefins was observed for the catalyst with SiO2/Al2O3 = 172 in the acidic component, likely because this zeolite had an optimum acidity for the production of light olefins.
Catalytic Activity of Tandem Catalysts Based on ZnGa2O4 and MFI Zeolite in CO2 Hydrogenation
https://orcid.org/https://orcid.org/0009-0003-5278-6519
https://orcid.org/https://orcid.org/0000-0002-8763-2232
https://orcid.org/https://orcid.org/0000-0001-5032-6381
https://orcid.org/https://orcid.org/0000-0001-8646-3679
https://orcid.org/https://orcid.org/0000-0002-8742-2892
A series of tandem catalysts based on a ZnGa2O4 spinel and on MFI-type acidic components with varying SiO2/Al2O3 ratios were prepared by mechanical mixing at a spinel to MFI weight ratio of 2 : 1. These catalysts were tested in the conversion of carbon dioxide to olefins at 380°C and 27 bar. The hydrogenating component (ZnGa2O4) was prepared by co-precipitation of the corresponding hydroxides followed by heat treatment. The zeolites were synthesized by steam-assisted crystallization. A reference catalyst was prepared from ZnGa2O4 and a hydrothermally synthesized commercial zeolite CBV28014. The physicochemical properties of the catalysts and their components were characterized by low-temperature nitrogen adsorption–desorption, chemical analysis, NH3-TPD, H2-TPR, XRD, and SEM. The sample with the highest SiO2/Al2O3 ratio (250) achieved the highest CO2 conversion; this parameter dropped as the aluminum content in the samples increased. The highest selectivity towards light olefins was observed for the catalyst with SiO2/Al2O3 = 172 in the acidic component, likely because this zeolite had an optimum acidity for the production of light olefins.
Catalytic Activity of Tandem Catalysts Based on ZnGa2O4 and MFI Zeolite in CO2 Hydrogenation
https://orcid.org/https://orcid.org/0009-0003-5278-6519
https://orcid.org/https://orcid.org/0000-0002-8763-2232
https://orcid.org/https://orcid.org/0000-0001-5032-6381
https://orcid.org/https://orcid.org/0000-0001-8646-3679
https://orcid.org/https://orcid.org/0000-0002-8742-2892
A series of tandem catalysts based on a ZnGa2O4 spinel and on MFI-type acidic components with varying SiO2/Al2O3 ratios were prepared by mechanical mixing at a spinel to MFI weight ratio of 2 : 1. These catalysts were tested in the conversion of carbon dioxide to olefins at 380°C and 27 bar. The hydrogenating component (ZnGa2O4) was prepared by co-precipitation of the corresponding hydroxides followed by heat treatment. The zeolites were synthesized by steam-assisted crystallization. A reference catalyst was prepared from ZnGa2O4 and a hydrothermally synthesized commercial zeolite CBV28014. The physicochemical properties of the catalysts and their components were characterized by low-temperature nitrogen adsorption–desorption, chemical analysis, NH3-TPD, H2-TPR, XRD, and SEM. The sample with the highest SiO2/Al2O3 ratio (250) achieved the highest CO2 conversion; this parameter dropped as the aluminum content in the samples increased. The highest selectivity towards light olefins was observed for the catalyst with SiO2/Al2O3 = 172 in the acidic component, likely because this zeolite had an optimum acidity for the production of light olefins.
Catalytic Activity of Tandem Catalysts Based on ZnGa2O4 and MFI Zeolite in CO2 Hydrogenation
Pet. Chem.
Ivanov, G. K. (Autor:in) / Maerle, A. A. (Autor:in) / Bachurina, D. O. (Autor:in) / Dobryakova, I. V. (Autor:in) / Ivanova, I. I. (Autor:in)
Petroleum Chemistry ; 64 ; 1138-1146
01.09.2024
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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