Comparison of different chemical-free pretreatment methods for the production of sugars, ethanol and methane from lignocellulosic biomass
Laen...
Kuupäev
2023
Kättesaadav alates
Autorid
Sjulander, Nikki
Rooni, Vahur
Rocha-Meneses, Lisandra
Kikas, Timo
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Most pretreatment methods for lignocellulosic biomass use strong chemicals, such as
sulphuric acid and ammonia, to open up the cellular structure of plant biomass. However, those
chemicals are not environmentally friendly and their use leads to safety risks. As a result, different
chemical-free pretreatment methods have been developed, which focus on the usage of pressure,
high or low temperatures and mild chemicals. Freezing pretreatment and explosive
decompression pretreatments, using different operating gases, such as nitrogen and steam, are
compared in the context of glucose, ethanol and methane yield in this review. For the methane
production, the stillage from bioethanol production is used. The usage of this waste improves the
overall valorisation of lignocellulosic biomass. The review also investigates, whether the nitrogen
explosive decompression pretreatment is suitable for the treatment of softwoods, hardwoods and
herbaceous materials. In the comparison of different chemical-free pretreatment methods, it is
concluded that heat and water are the most influential parameters for opening up the
lignocellulosic biomass structure. The operating gas and pressure in the pretreatment reactor are less
relevant. Steam explosion, nitrogen explosive decompression pretreatment and autohydrolysis
pretreatment are the most suitable chemical-free pretreatment methods for lignocellulosic biomass.
Kirjeldus
Received: February 19th, 2023 ; Accepted: June 3rd, 2023 ; Published: July 3rd, 2023 ; Correspondence: nikki.sjulander@emu.ee, timo.kikas@emu.ee
Märksõnad
anaerobic digestion, biofuels, fermentation, lignocellulosic inhibitors, steam explosion, articles