A morpholinium ionic liquid for rice straw pretreatment to enhance ethanol production
Journal article, 2019

Rice straw was successfully pretreated with a novel and inexpensive morpholinium ionic liquid, 1-H-3-methylmorpholinium chloride ([HMMorph][Cl]). The influence of water (30, 40, 50% w/w) and dimethyl sulfoxide (DMSO) (10, 30% w/w), as co-solvents, pretreatment time (2, 3, 5 h), temperature (90, 105, 120 °C), solid loading (5, 6.7, 10% w/w), and straw particle size (<0.177, 0.177–0.841 mm, and 0.841–2 mm) were investigated for maximum ethanol production. The best results were obtained in 50% water, at 120 °C and 5% (w/w) solid loading for 5 h from 0.177 – 0.841 mm straw particles. The hydrolysis yield was increased from 33.2% to 70.1%, while ethanol production yield was improved from 21.9% to 64% of the theoretical maximum. The performance of the IL was comparable to 1-ethyl-3-methylimidazolium acetate. Simple synthesis process and dilute solution required for the pretreatment with [HMMorph][Cl] offers cost reductions in the use of ILs in biofuel production.

Morpholinium ionic liquid

Rice straw




Marzieh Mohamadi

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Isfahan University of Technology

Marzieh Shafiei

University of Isfahan

Amir Abdolmaleki

Isfahan University of Technology

Shiraz University

Keikhosro Karimi

Isfahan University of Technology

J. P. Mikkola

Umeå University

Åbo Akademi

Christer Larsson

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Industrial Crops and Products

0926-6690 (ISSN)

Vol. 139 111494

Subject Categories

Renewable Bioenergy Research

Chemical Process Engineering




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