Hydrothermal Liquefaction of Kraft Lignin in Subcritical Water: Influence of Phenol as Capping Agent
Artikel i vetenskaplig tidskrift, 2018

The depolymerization of LignoBoost Kraft lignin in subcritical water, i.e. hydrothermal liquefaction (HTL), was investigated using ZrO 2 , K 2 CO 3 , and KOH as catalysts in a fixed-bed reactor with recirculation. Focus was placed on the effect exerted by the concentration of the phenol in suppressing repolymerization, which is responsible for forming char. Feeds with various concentrations of phenol (2-10%) were investigated, and the results showed that phenol partially prevents repolymerization even at low concentrations. The bio-oil yield of (61.0 ± 2.7) % was fairly stable when the concentration of phenol was varied. In the case of the formation of char on the catalyst, the char yield revealed a weakly decreasing trend (14.6-12.3%) when the amount of phenol in the feed was increased. The results also showed that the phenolic monomers that are alkylated, such as o-/p-cresols, increased significantly with increasing concentrations of phenol, while aromatic compounds, based on a guaiacol ring structure, showed decreasing trends.

Författare

Tallal Belkheiri

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Sven-Ingvar Andersson

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Cecilia Mattsson

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

L. Olausson

Valmet Power AB

Hans Theliander

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Lennart Vamling

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Energy & Fuels

0887-0624 (ISSN) 1520-5029 (eISSN)

Vol. 32 5 5923-5932

Ämneskategorier

Kemiska processer

Annan kemiteknik

Bioenergi

DOI

10.1021/acs.energyfuels.8b00068

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Senast uppdaterat

2018-06-11