A1 Journal article (refereed)
Hot-water extraction of Miscanthus × giganteus prior to soda-AQ pulping : a biorefining perspective (2020)

Ullah, S., Pakkanen, H., Lehto, J., & Alén, R. (2020). Hot-water extraction of Miscanthus × giganteus prior to soda-AQ pulping : a biorefining perspective. Biofuels, 11(8), 937-943. https://doi.org/10.1080/17597269.2018.1442664

JYU authors or editors

Publication details

All authors or editors: Ullah, Saleem; Pakkanen, Hannu; Lehto, Joni; Alén, Raimo

Journal or series: Biofuels

ISSN: 1759-7269

eISSN: 1759-7277

Publication year: 2020

Volume: 11

Issue number: 8

Pages range: 937-943

Publisher: Taylor & Francis

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1080/17597269.2018.1442664

Publication open access: Not open

Publication channel open access: 

Abstract

Agricultural residues, such as giant miscanthus (Miscanthus × giganteus, a hybrid of Miscanthus sinensis and Miscanthus sacchariflorus), show a great potential for use in lignocellulosic biorefineries. In this study, various hydrolysates were prepared from miscanthus stalks under varying temperatures (140 and 150°C) and reaction times corresponding to P-factors of 50 and 200, prior to undergoing sulfur-free soda-anthraquinone (AQ) pulping (alkali charge 15% and AQ charge 0.05% on oven-dried feedstock) to recover carbohydrate-derived material. During hot-water extraction, a significant mass removal (10%) of the initial miscanthus was obtained at 150°C with a reaction time of 240 min (P-factor 200). Hydrolysates were characterized in terms of pH and the amounts of carbohydrates, volatile acids (acetic and formic acids), and furans. Hot-water extraction also influenced the delignification stage; the highest pulp yield (62%) for the hot-water-extracted miscanthus (at 150°C with a P-factor of 200) was obtained at 165°C with a cooking time of 60 min (effective alkali charge 15% and AQ charge 0.05% on oven-dried feedstock). Results revealed that giant miscanthus is an attractive feedstock for this kind of integrated biorefining.

Keywords: agriculture; wastes; bioremediation; cellulose; biorefineries; yield

Free keywords: miscanthus × giganteus; biorefining; hemicelluloses; hot-water extraction; soda-AQ pulping; P-factor

Contributing organizations

Related projects

Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 1