Application of Ionic Liquid [DMIM]DMP Pretreatment in the Hydrolysis of Sugarcane Bagasse for Biofuel Production

Abstract

Sugarcane bagasse is one of lignocellulose materials that can be converted to biofuel. This work was aimed to develop new pretreatment combination methods to process sugarcane bagasse lignocellulose into biofuel (bio-hydrogen). Pretreatment of sugarcane bagasse using NaOH solution in combination with ionic liquid [DMIM]DMP enhanced the enzymatic hydrolysis significantly. After the pretreatment, the content of cellulose and hemicellulose increased by 29.31% compared to the untreated one. Cellulose and hemicelluloses were used as raw materials to produce reducing sugars, that can be converted to bio-hydrogen via fermentation. After being subjected to combined pretreatment processes, the crystalline index of sugarcane bagasse decreased significantly compared to solely NaOH pretratment. This indicates a more amorphous structure of the sugarcane bagasse, which makes it is easier to be hydrolyzed into reducing sugars. The recovery of cellulose + hemicellulose after pretreatment for 20 min and 120 °C was 92%, and the yield obtained was 0.556 g sugars/g (cellulose + hemicellulose) after 12 h and the bio-hydrogen yield was 0.46 mol H2/mol sugars consumed after 48 h fermentation. The use of recycled of ionic liquid showed similar performance compared to the use of fresh ionic liquid.

Measurement of high pressure densities and atmospheric pressure viscosities of alkyl phosphate anion ionic liquids and correlation with the ε ∗ -modified Sanchez-Lacombe equation of state

“…Hydrogen bond basicity (β) of the ionic liquid is considered to be the dominant physical property for biomass dissolution [1] with the minimum value required for β being equal to 0.8 [2]. Application of alkyl phosphate anion ionic liquids with the objective of degrading or pretreating biomass have been studied for corn [10,11], rice straw [11,12], sugarcane bagasse [13][14][15], barley starch [16] and cellulose [3,17,18]. Application of alkyl phosphate anion ionic liquids with the objective of degrading or pretreating biomass have been studied for corn [10,11], rice straw [11,12], sugarcane bagasse [13][14][15], barley starch [16] and cellulose [3,17,18].…”

Combined pretreatment of sugarcane bagasse using alkali and ionic liquid to increase hemicellulose content and xylanase production

“…A successful pretreatment or delignification enhances porosity, decreases polymerization and crystallinity of biomass, which elevates the accessibility of xylanases towards xylan [ 7 ]. Reports suggest that alkaline pretreatment of SB is better than acid (H 2 SO 4 ) pretreatment as NaOH can dissolve more lignin in SB than H 2 SO 4 [ 8 ]. Hydrogen peroxide [ 9 ] and ionic liquids (ILs) are other solvents that have also been employed for pretreatment of biomass.…”

Study of The Composition, Fuel Parameter, and Triangular Graph of A Gasoline and Aqueous Ethanol Fuel Blend in a Single Phase

“…Currently, scientists are devoting intensive effort to the conversion of renewable resources, including lignocellulose (biomass) into valuable materials, such as ethanol [1][2], sugar [3][4][5], gas [6] and hydrogen [7]. The biofuels derived from these materials, which provide renewable energy, have been investigated to overcome the issue of decreasing reserves of fossil-based fuels [8][9][10][11].…”