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Issue 50, 2014
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Exceptionally high yields of furfural from assorted raw biomass over solid acids

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Abstract

Development of stable and recyclable solid acid catalysts in the efficient valorisation of hemicellulose to yield C5 sugars and furfural is vital to boost the prospects of using lignocelluloses for chemicals synthesis. Using an silicoaluminophosphate, namely SAPO-44, as a catalyst, an environmentally benign process of furfural synthesis from diversified real substrates (without any treatment or the need for separation of its components) is shown. In an efficient one-pot methodology, at 443 K and in the presence of a biphasic solvent system, selective conversions of hemicelluloses from raw biomass (bagasse, rice husk and wheat straw) to extraordinarily high yields of furfural of about 93% were attainable. Under similar reaction conditions, an 82% yield of furfural is also achievable directly from isolated hemicellulose within 10 h. Hydrophilic SAPO-44, having higher hydrothermal stability, showed similar activity for all the substrates for a minimum of up to 8 times in recycling runs. Various physico-chemical characterizations (X-ray diffraction, thermogravimetric analysis-derivative thermogravimetry, temperature programmed desorption-NH3, N2 sorption, solid-state nuclear magnetic resonance spectroscopy) of fresh and spent catalysts were used to improve SAPO-44 stability.

Graphical abstract: Exceptionally high yields of furfural from assorted raw biomass over solid acids

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Publication details

The article was received on 20 Dec 2013, accepted on 28 May 2014 and first published on 29 May 2014


Article type: Paper
DOI: 10.1039/C4RA04119D
Citation: RSC Adv., 2014,4, 26215-26221

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    Exceptionally high yields of furfural from assorted raw biomass over solid acids

    P. Bhaumik and P. L. Dhepe, RSC Adv., 2014, 4, 26215
    DOI: 10.1039/C4RA04119D

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