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Efficient Solid Acid Catalyst Containing Lewis and Brønsted Acid Sites for the Production of Furfurals

Authors

  • Michael G. Mazzotta,

    1. Department of Chemistry and the Center for Catalytic Conversion of Biomass to Biofuels (C3Bio), Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907 (USA)
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  • Dinesh Gupta,

    1. Department of Chemistry, University of Delhi, Delhi 110007 (India)
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  • Dr. Basudeb Saha,

    Corresponding author
    1. Department of Chemistry and the Center for Catalytic Conversion of Biomass to Biofuels (C3Bio), Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907 (USA)
    • Department of Chemistry and the Center for Catalytic Conversion of Biomass to Biofuels (C3Bio), Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907 (USA)===

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  • Dr. Astam K. Patra,

    1. Department of Material Science, Indian Associate for the Cultivation of Science, Kolkata 700032 (India)
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  • Prof. Dr. Asim Bhaumik,

    1. Department of Material Science, Indian Associate for the Cultivation of Science, Kolkata 700032 (India)
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  • Prof. Dr. Mahdi M. Abu-Omar

    Corresponding author
    1. Department of Chemistry and the Center for Catalytic Conversion of Biomass to Biofuels (C3Bio), Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907 (USA)
    • Department of Chemistry and the Center for Catalytic Conversion of Biomass to Biofuels (C3Bio), Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907 (USA)===

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Abstract

Self-assembled nanoparticulates of porous sulfonated carbonaceous TiO2 material that contain Brønsted and Lewis acidic sites were prepared by a one-pot synthesis method. The material was characterized by XRD, FTIR spectroscopy, NH3 temperature-programmed desorption, pyridine FTIR spectroscopy, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, N2-sorption, atomic absorbance spectroscopy, and inductively coupled plasma optical emission spectroscopy. The carbonaceous heterogeneous catalyst (Glu-TsOH-Ti) with a Brønsted-to-Lewis acid density ratio of 1.2 and more accessible acid sites was effective to produce 5-hydroxymethylfurfural and furfural from biomass-derived mono- and disaccharides and xylose in a biphasic solvent that comprised water and biorenewable methyltetrahydrofuran. The catalyst was recycled in four consecutive cycles with a total loss of only 3 % activity. Thus, Glu-TsOH-Ti, which contains isomerization and dehydration catalytic sites and is based on a cheap and biorenewable carbon support, is a sustainable catalyst for the production of furfurals, platform chemicals for biofuels and chemicals.

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