Isolation and Characterization of Organosolv and Alkaline Lignins from Hardwood and Softwood Biomass

Christos Nitsos, Ryan Stoklosa, Anthi Karnaouri, Dimitrij Vörös, Heiko Lange, David Hodge, Claudia Crestini, Ulrika Rova, Paul Christakopoulos

Research output: Contribution to journalArticle

  • 14 Citations

Abstract

Isolation of lignins from hardwood and softwood biomass samples, containing 26.1% and 28.1% lignin, respectively, has been performed with the use of alkaline and organosolv pretreatment methods. The effect of catalyst loading, ethanol content, particle size, and pretreatment time on the yields and properties of the isolated lignins were investigated. Alkaline lignins had higher carbohydrate content - up to 30% - and exhibited higher molecular weights in the range of 3000 Da, with a maximum phenolic hydroxyl content of 1 mmol g-1 for birch and 2 mmol g-1 for spruce. Organosolv lignins, on the other hand, showed high purity - 93% or higher - despite the more extensive biomass dissolution into the pretreatment medium; they also exhibited a lower range of molecular weights between 600 and 1600 Da depending on the source and pretreatment conditions. Due to the lower molecular weight, phenolic hydroxyl content was also increased, reaching as high as 4 mmol g-1 with a simultaneous decrease in aliphatic hydroxyl content as low as 0.6 mmol g-1. Efficient lignin dissolution of 62% for spruce and 69% for birch, achieved at optimal pretreatment conditions, was combined with extensive hemicellulose removal.

LanguageEnglish (US)
Pages5181-5193
Number of pages13
JournalACS Sustainable Chemistry and Engineering
Volume4
Issue number10
DOIs
StatePublished - Oct 3 2016

Profile

Softwoods
Lignin
Hardwoods
lignin
Biomass
biomass
Hydroxyl Radical
Molecular weight
Dissolution
dissolution
Carbohydrates
carbohydrate
ethanol
Ethanol
catalyst
Particle size
particle size
Catalysts

Keywords

  • Alkaline
  • Biomass
  • Fractionation
  • Lignin
  • Organosolv
  • Pretreatment

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this

Nitsos, C., Stoklosa, R., Karnaouri, A., Vörös, D., Lange, H., Hodge, D., ... Christakopoulos, P. (2016). Isolation and Characterization of Organosolv and Alkaline Lignins from Hardwood and Softwood Biomass. ACS Sustainable Chemistry and Engineering, 4(10), 5181-5193. DOI: 10.1021/acssuschemeng.6b01205

Isolation and Characterization of Organosolv and Alkaline Lignins from Hardwood and Softwood Biomass. / Nitsos, Christos; Stoklosa, Ryan; Karnaouri, Anthi; Vörös, Dimitrij; Lange, Heiko; Hodge, David; Crestini, Claudia; Rova, Ulrika; Christakopoulos, Paul.

In: ACS Sustainable Chemistry and Engineering, Vol. 4, No. 10, 03.10.2016, p. 5181-5193.

Research output: Contribution to journalArticle

Nitsos, C, Stoklosa, R, Karnaouri, A, Vörös, D, Lange, H, Hodge, D, Crestini, C, Rova, U & Christakopoulos, P 2016, 'Isolation and Characterization of Organosolv and Alkaline Lignins from Hardwood and Softwood Biomass' ACS Sustainable Chemistry and Engineering, vol 4, no. 10, pp. 5181-5193. DOI: 10.1021/acssuschemeng.6b01205
Nitsos C, Stoklosa R, Karnaouri A, Vörös D, Lange H, Hodge D et al. Isolation and Characterization of Organosolv and Alkaline Lignins from Hardwood and Softwood Biomass. ACS Sustainable Chemistry and Engineering. 2016 Oct 3;4(10):5181-5193. Available from, DOI: 10.1021/acssuschemeng.6b01205
Nitsos, Christos ; Stoklosa, Ryan ; Karnaouri, Anthi ; Vörös, Dimitrij ; Lange, Heiko ; Hodge, David ; Crestini, Claudia ; Rova, Ulrika ; Christakopoulos, Paul. / Isolation and Characterization of Organosolv and Alkaline Lignins from Hardwood and Softwood Biomass. In: ACS Sustainable Chemistry and Engineering. 2016 ; Vol. 4, No. 10. pp. 5181-5193
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