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Issue 3, 2014
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Comparison of the influence of a Lewis acid AlCl3 and a Brønsted acid HCl on the organosolv pulping of beech wood

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Abstract

In this work the influence of a Lewis acid AlCl3 and a Brønsted acid HCl on the organosolv process is investigated. Beech wood is pulped with an aqueous ethanol solution (50 vol%) for 1 h in the temperature range from 150 °C to 190 °C. Also the organosolv lignins are investigated regarding their molar mass distribution and OH-groups occurrence. The xylan degradation kinetics of the AlCl3 catalyzed pulping is investigated at 170 °C and compared with literature data. For this purpose kinetic models from the literature are used. The activation energy of xylan hydrolysis was determined as 61 kJ mol−1. This value is much lower than other reported activation energies using Brønsted acids as catalysts.

Graphical abstract: Comparison of the influence of a Lewis acid AlCl3 and a Brønsted acid HCl on the organosolv pulping of beech wood

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Publication details

The article was received on 02 Oct 2013, accepted on 19 Dec 2013 and first published on 20 Dec 2013


Article type: Paper
DOI: 10.1039/C3GC42050G
Citation: Green Chem., 2014,16, 1569-1578

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    Comparison of the influence of a Lewis acid AlCl3 and a Brønsted acid HCl on the organosolv pulping of beech wood

    M. Schwiderski, A. Kruse, R. Grandl and D. Dockendorf, Green Chem., 2014, 16, 1569
    DOI: 10.1039/C3GC42050G

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