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Catalytic Hydrocracking of -C-O-Bridged Bonds over Mg2Si/γ-Al2O3 Catalyst

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Abstract

Nano γ-Al2O3 support was prepared by sol-gel method, and the Mg2Si/γ-Al2O3 catalyst was prepared by impregnation method from Mg2Si and the γ-Al2O3 support. The catalyst was characterized by X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy and CO2 temperature-programmed desorption analysis. The catalytic hydrocracking of lignite-related modelcompounds, 1-methoxynaphthalene (1-MON) and bibenzyl ether (BE), was investigated. Mg2Si was well distributed on the surface and in the voids of γ-Al2O3 support. The Mg2Si/γ-Al2O3 catalyst had high specific surface area, large amount of mesopores, strong basicity, and exhibited high catalytic efficiency in hydrocracking of 1-MON and BE due to the synergic effect between Mg2Si and γ-Al2O3. Under an initial hydrogen pressure of 3 MPa and reaction time of 60 min, the conversion of 1-MON and BE reached 100% when the reaction temperatures were 225 and 175°C, respectively. The selectivities for naphthalene and toluene were close to 100%, only traces of the hydrogenated products were detected. After 4 cycle tests, the catalytic activity of Mg2Si/γ-Al2O3 catalystdropped to 50%.

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ACKNOWLEDGMENTS

This work was supported by National Natural Science Foundation of China (Grant 21676293), and the Key Project of Joint Fund from National Natural Science Foundation of China and the Government of Xinjiang Uygur Autonomous Region (Grant U1503293).

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Correspondence to Xing Fan.

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Wang, R., Sun, B., Zhu, J. et al. Catalytic Hydrocracking of -C-O-Bridged Bonds over Mg2Si/γ-Al2O3 Catalyst. Solid Fuel Chem. 56, 37–44 (2022). https://doi.org/10.3103/S0361521922010098

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  • DOI: https://doi.org/10.3103/S0361521922010098

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