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Abstract <p>A series of tandem catalysts based on indium, zinc, and gallium oxides were synthesized, with a CHA-type silicoaluminophosphate and an MFI-type zeolite as acidic components. These catalysts were tested in the conversion of carbon dioxide to olefins at 380°C and 27 bar, with the component arrangement being varied. The physicochemical properties of the catalysts and their components were characterized by low-temperature nitrogen adsorption, X-ray diffraction analysis (XRD), X-ray fluorescence spectrometry (XRF), scanning electron microscopy (SEM), and temperature-programmed desorption of ammonia (NH<sub>3</sub>-TPD). It is shown that the optimal arrangement of the hydrogenating and acidic components in the reactor depends on the type of the hydrogenating component. The best catalytic performance (33% CO<sub>2</sub> conversion and 5.6% yield of hydrocarbons) was achieved in the presence of a ZnGa<sub>2</sub>O<sub>4</sub>/MFI catalyst with the components being mechanically mixed.</p>

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Catalytic Activity of Tandem Catalysts in CO2 Hydrogenation to Olefins Depending on Component Arrangement

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • G. K. Ivanov,
  • A. A. Maerle,
  • D. O. Bachurina,
  • T. M. Roshchina,
  • I. I. Ivanova

摘要

Abstract

A series of tandem catalysts based on indium, zinc, and gallium oxides were synthesized, with a CHA-type silicoaluminophosphate and an MFI-type zeolite as acidic components. These catalysts were tested in the conversion of carbon dioxide to olefins at 380°C and 27 bar, with the component arrangement being varied. The physicochemical properties of the catalysts and their components were characterized by low-temperature nitrogen adsorption, X-ray diffraction analysis (XRD), X-ray fluorescence spectrometry (XRF), scanning electron microscopy (SEM), and temperature-programmed desorption of ammonia (NH3-TPD). It is shown that the optimal arrangement of the hydrogenating and acidic components in the reactor depends on the type of the hydrogenating component. The best catalytic performance (33% CO2 conversion and 5.6% yield of hydrocarbons) was achieved in the presence of a ZnGa2O4/MFI catalyst with the components being mechanically mixed.