Article ID Journal Published Year Pages File Type
4997764 Bioresource Technology 2017 7 Pages PDF
Abstract
An ionic liquid of N-methylmorpholine-N-oxide (NMMO) was used to effectively pretreat cassava residues for the efficient enzymatical hydrolysis and cogeneration of fermentative hydrogen and methane. The reducing sugar yield of enzymolysed cassava residues with NMMO pretreatment improved from 36 to 42 g/100 g cassava residues. Scanning electron microscopy images revealed the formation of deep grooves (∼4 μm wide) and numerous pores in the cassava residues pretreated with NMMO. X-ray diffraction patterns showed that the crystallinity coefficient of NMMO-pretreated cassava residues decreased from 40 to 34. Fourier transform infrared spectra indicated that crystal cellulose I was partially transformed to amorphous cellulose II in the NMMO-pretreated cassava residues. This transformation resulted in a reduced crystallinity index from 0.85 to 0.77. Hydrogen yield from the enzymolysed cassava residues pretreated with NMMO increased from 92.3 to 126 mL/g TVS, and the sequential methane yield correspondingly increased from 79.4 to 101.6 mL/g TVS.
Related Topics
Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
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