Reductive liquefaction of lignin to monocyclic hydrocarbons: ReS2/Al2O3 as efficient char inhibitor and hydrodeoxygenation catalyst
Artikel i vetenskaplig tidskrift, 2021

Thermochemical processing of lignin ends up with a major problem which is the high yield of char remained from lignin conversion, causing low yields of desired products. The ReS2/Al2O3 catalyst, used in this work, exhibited a high char-suppressing potential and high hydrodeoxygenation efficiency in the reductive liquefaction of kraft lignin. Compared to NiMo/Al2O3, as a conventional sulfide catalyst, ReS2/Al2O3 showed significantly better catalytic performance with 72.4 % lower char yield, due to its high efficiency in stabilizing the lignin-depolymerized fragments. The remarkable catalytic performance of ReS2/Al2O3 is attributed to its high oxophilicity, the metal-like behavior of rhenium sulfide and sufficient acidity. The effects of reaction temperature and different catalyst supports (Al2O3, ZrO2 and desilicated HY zeolite) were also studied. In an alkali (NaOH)-assisted depolymerization of lignin, it was revealed that ReS2/Al2O3-to-NaOH (stabilization-to-depolymerization) ratio plays a crucial role in determining the reaction pathway toward either solid char residues or liquid monomeric products.

Reductive liquefaction

Lignin

Char suppression

ReS /Al O 2 2 3

Monocyclic hydrocarbon

Författare

Pouya Sirous Rezaei

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparat- och reaktionsteknik

Derek Creaser

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparat- och reaktionsteknik

Louise Olsson

Chalmers, Kemi och kemiteknik, Kemiteknik

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 297 120449

Kombinerade experiment och kinetikmodellering för ligninvalorisering till kemikalier och bränslen

Formas (2017-01392), 2018-01-01 -- 2020-12-31.

Lignin depolymerisering till bränslekomponenter genom katalytisk hydrogenering

Energimyndigheten (47511-1), 2019-01-01 -- 2022-12-31.

Ämneskategorier

Kemiska processer

Annan kemiteknik

Bioenergi

DOI

10.1016/j.apcatb.2021.120449

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Senast uppdaterat

2021-06-29