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Improvement of ethanol production from birch and spruce pretreated with 1-H-3-methylmorpholinium chloride
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2019 (English)In: Electronic Journal of Biotechnology, ISSN 0717-3458, E-ISSN 0717-3458, Vol. 41, p. 95-99Article in journal (Refereed) Published
Abstract [en]

Background: Pretreatment is the critically important step for the production of ethanol from lignocelluloses. In this study, hardwood birch (Betula pendula) and softwood spruce (Norway spruce) woods were pretreated with a newly synthesized morpholinium ionic liquid, 1-H-3-methylmorpholinium chloride ([HMMorph][Cl]), followed by enzymatic hydrolysis and fermentation to ethanol.

Results: [HMMorph][Cl] was synthesized using inexpensive raw materials, i.e., hydrochloric acid and N-methyl morpholine, following a simple process. The influence of pretreatment time (2, 3, 5, and 8 h) and temperature (120 and 140°C) in terms of hydrolysis efficiency was investigated. Glucose yields from enzymatic hydrolysis were improved from 13.7% to 45.7% and 12.9% to 51.8% after pretreatment of birch and spruce woods, respectively, under optimum pretreatment conditions (i.e., at 140°C for 3 h) as compared to those from pristine woods. Moreover, the yields of ethanol production from birch and spruce were increased to 34.8% and 44.2%, respectively, while the yields were negligible for untreated woods.

Conclusions: This study demonstrated the ability of [HMMorph][Cl] as an inexpensive agent to pretreat both softwood and hardwood.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 41, p. 95-99
Keywords [en]
Betula, Biofuels, Cellulase, Cellulose, Ethanol, Hydrolysis, Ionic liquid, Lignin, Lignocellulose, Morpholinium ionic liquid, Pretreatment
National Category
Chemical Process Engineering
Identifiers
URN: urn:nbn:se:umu:diva-162903DOI: 10.1016/j.ejbt.2019.07.004OAI: oai:DiVA.org:umu-162903DiVA, id: diva2:1347153
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Bio4EnergyAvailable from: 2019-08-30 Created: 2019-08-30 Last updated: 2019-09-05Bibliographically approved

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Mikkola, Jyri-Pekka

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