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Issue 11, 2011
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Morphological and structural differences between glucose, cellulose and lignocellulosic biomass derived hydrothermal carbons

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Abstract

Hydrothermal carbonization (HTC) has demonstrated that it is an effective technique for the production of functionalized carbon materials from simple carbohydrates, such as monosaccharides and disaccharides. The chemical structure of the HTC carbon has been identified in detail by means of solid-state MAS 13C NMR investigations. However, it has not yet been clearly shown what the effects are of the processing temperature and time on the chemical structure and morphology of the generated HTC carbon. This study shows, with the help of SEM, elemental and yield analysis and solid-state MAS 13C NMR, the effects of these two key variables on the final nature of the produced material, allowing the development of a mechanistic model. According to the chosen set of processing parameters, the chemical structure of the HTC carbon can be tuned from polyfuran rich in oxygen containing functional groups to a carbon network of extensive aromatic domains. The same kind of investigation using lignocellulosic biomass as a carbon precursor shows a striking difference between the HTC mechanism of glucose and cellulose. The biopolymer, when it is treated under mild hydrothermal conditions (180–280 °C), tends to react according to a reaction scheme which leads to its direct transformation into an aromatic carbon network and which has strong similarities with classical pyrolysis.

Graphical abstract: Morphological and structural differences between glucose, cellulose and lignocellulosic biomass derived hydrothermal carbons

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Publication details

The article was received on 23 Jun 2011, accepted on 16 Aug 2011 and first published on 08 Sep 2011


Article type: Paper
DOI: 10.1039/C1GC15742F
Citation: Green Chem., 2011,13, 3273-3281
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    Morphological and structural differences between glucose, cellulose and lignocellulosic biomass derived hydrothermal carbons

    C. Falco, N. Baccile and M. Titirici, Green Chem., 2011, 13, 3273
    DOI: 10.1039/C1GC15742F

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