On the hydrothermal depolymerisation of kraft lignin using glycerol as a capping agent
Artikel i vetenskaplig tidskrift, 2023

Depolymerisation of kraft lignin under hydrothermal conditions was investigated at short residence times (1–12 min) with glycerol being used as a capping agent. The weight average molecular weight (M w) of the products decreased within the first minute of residence time, with the inter-unit ether linkages breaking accordingly. Furthermore, the M w of the product fractions decreased at increasing residence times, while the char yield increased. Short residence times thus appear to be beneficial for mitigating the formation of char. Also, addition of NaOH reduced the yield of char. Although the addition of glycerol caused a decrease in the M w of the products, it seemed to increase the yield of char and therefore might not be a suitable capping agent for kraft lignin depolymerisation.

HTL

hydrothermal liquefaction

kraft lignin

depolymerisation

glycerol

Författare

Anders Ahlbom

Chalmers, Kemi och kemiteknik, Kemiteknik

Marco Maschietti

Aalborg universitet

Rudi Nielsen

Aalborg universitet

Merima Hasani

Chalmers, Kemi och kemiteknik, Kemiteknik

Hans Theliander

Chalmers, Kemi och kemiteknik, Kemiteknik

Holzforschung

0018-3830 (ISSN) 1437-434X (eISSN)

Vol. 77 3 159-169

Från lignin till biobränslen och specialkemikalier

Energimyndigheten (45395-1), 2018-01-01 -- 2021-12-31.

Ämneskategorier

Teknisk mekanik

Pappers-, massa- och fiberteknik

Skogsvetenskap

DOI

10.1515/hf-2022-0146

Mer information

Senast uppdaterat

2023-03-21