Abstract
In this contribution, the recovered TiO2 from waste Selective Catalytic Reduction (SCR) was transformed into a solid superacid catalyst (TiO2/SO42−) modified by sulfuric acid (H2SO4). The results of XRD suggest that the crystal structures of TiO2 are not destroyed during the recovery and sulfation processes. The recovered TiO2-modified superacid catalyst has a greater surface area (42.84 m2/g) than TiO2/SO42− catalysts produced from pure TiO2 reported by previous researchers. The Barrett-Joyner-Halenda (BJH) pore size distribution confirms that the samples are essentially mesoporous structures. The NH3-TPD analysis demonstrated that the formation of the superacid sites occurs at a temperature ranging between 400 and 500 °C. The prepared TiO2/SO42− solid superacid catalyst exhibits good catalytic activity with a conversion above 92% in the transesterification of ethyl acetate and n-butanol.
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This work was supported by the National Natural Science Foundation of China (No. 21376022).
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Hassan, M.A., Wang, W., Chang, Z. et al. TiO2/SO42− Solid Superacid Catalyst Prepared by Recovered TiO2 from Waste SCR and Its Application in Transesterification of Ethyl Acetate with n-butanol. Waste Biomass Valor 14, 4035–4043 (2023). https://doi.org/10.1007/s12649-023-02132-5
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DOI: https://doi.org/10.1007/s12649-023-02132-5