Oxidative degradation of biorefinery lignin obtained after pretreatment of forest residues of Douglas Fir.

Abstract:

:Harvested forest residues are usually considered a fire hazards and used as "hog-fuel" which results in air pollution. In this study, the biorefinery lignin stream obtained after wet explosion pretreatment and enzymatic hydrolysis of forestry residues of Douglas Fir (FS-10) was characterized and further wet oxidized under alkaline conditions. The studies indicated that at 10% solids, 11.7wt% alkali and 15min residence time, maximum yields were obtained for glucose (12.9wt%), vanillin (0.4wt%) at 230°C; formic acid (11.6wt%) at 250°C; acetic acid (10.7wt%), hydroxybenzaldehyde (0.2wt%), syringaldehyde (0.13wt%) at 280°C; and lactic acid (12.4wt%) at 300°C. FTIR analysis of the solid residue after wet oxidation showed that the aromatic skeletal vibrations relating to lignin compounds increased with temperature indicating that higher severity could result in increased lignin oxidation products. The results obtained, as part of the study, is significant for understanding and optimizing processes for producing high-value bioproducts from forestry residues.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Srinivas K,de Carvalho Oliveira F,Teller PJ,Gonҫalves AR,Helms GL,Ahring BK

doi

10.1016/j.biortech.2016.09.040

subject

Has Abstract

pub_date

2016-12-01 00:00:00

pages

394-404

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(16)31297-4

journal_volume

221

pub_type

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