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Issue 91, 2016, Issue in Progress
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Hydrogenolysis process for lignosulfonate depolymerization using synergistic catalysts of noble metal and metal chloride

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Abstract

A novel hydrogenolysis process for lignosulfonate depolymerization was proposed using a noble metal catalyst cooperated with metal chloride in methanol. Hydrogenolysis performance was significantly affected by the catalysts, via a synergistic catalytic effect between the Lewis acid (metal chloride) and the noble metal. Reaction conditions were also optimized, with 8.6% aliphatic alcohols and 9.2% monomers obtained at 280 °C for 5 h over Pt/C cooperated with CrCl3. Analysis of the depolymerized products indicated that CrCl3 had a catalytic promoting effect on cleavage of β-O-4 bonds with the synergistic catalytic effect of Pt/C. Meanwhile, the noble metal catalysed saturation of the depolymerized products and suppressed them from condensing into residues. The sulfonic groups of lignosulfonate were cleaved and they did not cause Pt/C poisoning. The catalyst showed good recyclability, with no significant loss of catalytic activity after three runs.

Graphical abstract: Hydrogenolysis process for lignosulfonate depolymerization using synergistic catalysts of noble metal and metal chloride

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Publication details

The article was received on 29 Jun 2016, accepted on 02 Sep 2016 and first published on 05 Sep 2016


Article type: Paper
DOI: 10.1039/C6RA16725J
RSC Adv., 2016,6, 88788-88796

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    Hydrogenolysis process for lignosulfonate depolymerization using synergistic catalysts of noble metal and metal chloride

    R. Shu, Y. Xu, L. Ma, Q. Zhang, T. Wang, P. Chen and Q. Wu, RSC Adv., 2016, 6, 88788
    DOI: 10.1039/C6RA16725J

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