Base promoted hydrogenolysis of lignin model compounds and organosolv lignin over metal catalysts in water

Hannelore Konnerth, Jiaguang Zhang, Ding Ma, Martin H. G. Prechtl, Ning Yan

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Herein we present a systematic investigation On the promotional effect of base in metal catalysed hydrogenolysis of lignin model compounds and organosolv lignin. The research started with the evaluation of pH effects (pH 1-14) on the hydrogenolysis of a lignin beta-O-4 model compound over a Ru catalyst (a stable catalyst over a wide pH range), from which a significantly increased selectivity towards monomeric compounds was observed in the presence of base. This promotional effect was studied in detail over bimetallic Ni7Au3 nanoparticles. Addition of a strong base such as NaOH significantly enhanced the activity and selectivity for C-O bond hythogenolysis over undesired hydrogenation reactions, not only in lignin model compounds but also in real lignin conversion. Notably, the yield for monomeric aromatic compounds from lignin over Ni7Au3 catalyst increased ca. 100% after adding NaOH as a promoter, under the same reaction conditions. Mechanistic study suggest that addition of base significantly reduced the benzene ring hydrogenation activity of the metal catalysts. The effect of adding different bases over various metal catalysts were also investigated. (C) 2014 Elsevier Ltd. All rights reserved
OriginalsprogEngelsk
TidsskriftChemical Engineering Science
Vol/bind123
Sider (fra-til)155-163
Antal sider9
ISSN0009-2509
DOI
StatusUdgivet - 2015
Udgivet eksterntJa

Citer dette

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title = "Base promoted hydrogenolysis of lignin model compounds and organosolv lignin over metal catalysts in water",
abstract = "Herein we present a systematic investigation On the promotional effect of base in metal catalysed hydrogenolysis of lignin model compounds and organosolv lignin. The research started with the evaluation of pH effects (pH 1-14) on the hydrogenolysis of a lignin beta-O-4 model compound over a Ru catalyst (a stable catalyst over a wide pH range), from which a significantly increased selectivity towards monomeric compounds was observed in the presence of base. This promotional effect was studied in detail over bimetallic Ni7Au3 nanoparticles. Addition of a strong base such as NaOH significantly enhanced the activity and selectivity for C-O bond hythogenolysis over undesired hydrogenation reactions, not only in lignin model compounds but also in real lignin conversion. Notably, the yield for monomeric aromatic compounds from lignin over Ni7Au3 catalyst increased ca. 100{\%} after adding NaOH as a promoter, under the same reaction conditions. Mechanistic study suggest that addition of base significantly reduced the benzene ring hydrogenation activity of the metal catalysts. The effect of adding different bases over various metal catalysts were also investigated. (C) 2014 Elsevier Ltd. All rights reserved",
author = "Hannelore Konnerth and Jiaguang Zhang and Ding Ma and Prechtl, {Martin H. G.} and Ning Yan",
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year = "2015",
doi = "10.1016/j.ces.2014.10.045",
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Base promoted hydrogenolysis of lignin model compounds and organosolv lignin over metal catalysts in water. / Konnerth, Hannelore; Zhang, Jiaguang; Ma, Ding; Prechtl, Martin H. G.; Yan, Ning.

I: Chemical Engineering Science, Bind 123, 2015, s. 155-163.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Base promoted hydrogenolysis of lignin model compounds and organosolv lignin over metal catalysts in water

AU - Konnerth, Hannelore

AU - Zhang, Jiaguang

AU - Ma, Ding

AU - Prechtl, Martin H. G.

AU - Yan, Ning

N1 - Times Cited: 0 0

PY - 2015

Y1 - 2015

N2 - Herein we present a systematic investigation On the promotional effect of base in metal catalysed hydrogenolysis of lignin model compounds and organosolv lignin. The research started with the evaluation of pH effects (pH 1-14) on the hydrogenolysis of a lignin beta-O-4 model compound over a Ru catalyst (a stable catalyst over a wide pH range), from which a significantly increased selectivity towards monomeric compounds was observed in the presence of base. This promotional effect was studied in detail over bimetallic Ni7Au3 nanoparticles. Addition of a strong base such as NaOH significantly enhanced the activity and selectivity for C-O bond hythogenolysis over undesired hydrogenation reactions, not only in lignin model compounds but also in real lignin conversion. Notably, the yield for monomeric aromatic compounds from lignin over Ni7Au3 catalyst increased ca. 100% after adding NaOH as a promoter, under the same reaction conditions. Mechanistic study suggest that addition of base significantly reduced the benzene ring hydrogenation activity of the metal catalysts. The effect of adding different bases over various metal catalysts were also investigated. (C) 2014 Elsevier Ltd. All rights reserved

AB - Herein we present a systematic investigation On the promotional effect of base in metal catalysed hydrogenolysis of lignin model compounds and organosolv lignin. The research started with the evaluation of pH effects (pH 1-14) on the hydrogenolysis of a lignin beta-O-4 model compound over a Ru catalyst (a stable catalyst over a wide pH range), from which a significantly increased selectivity towards monomeric compounds was observed in the presence of base. This promotional effect was studied in detail over bimetallic Ni7Au3 nanoparticles. Addition of a strong base such as NaOH significantly enhanced the activity and selectivity for C-O bond hythogenolysis over undesired hydrogenation reactions, not only in lignin model compounds but also in real lignin conversion. Notably, the yield for monomeric aromatic compounds from lignin over Ni7Au3 catalyst increased ca. 100% after adding NaOH as a promoter, under the same reaction conditions. Mechanistic study suggest that addition of base significantly reduced the benzene ring hydrogenation activity of the metal catalysts. The effect of adding different bases over various metal catalysts were also investigated. (C) 2014 Elsevier Ltd. All rights reserved

U2 - 10.1016/j.ces.2014.10.045

DO - 10.1016/j.ces.2014.10.045

M3 - Journal article

VL - 123

SP - 155

EP - 163

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

ER -