Statistical methodology for optimizing the dilute acid hydrolysis of sugarcane bagasse

Abstract

In converting advanced biomass to fuel, one pretreatment that has been extensively explored is a high temperature, dilute-sulfuric acid (H 2 SO 4 ) process. This effectively hydrolyzes the hemicellulosic portion of the lignocellulosic biomass to fermentable sugars. Our aim was to optimize the concentration of sulfuric acid and residence time to release xylose from the hemicellulose of sugarcane bagasse. According to response surface methodology (RSM), the optimum concentrations and residence time were determined. The experimental maximum yield for xylose production was found to be 78.9% at 170 o C, 0.24% acid, for 15 min, and 76.4% at 200 o C, 0.22% acid, for 6 min. The predicted maximum yield obtained for the fitted model was found to be 80.3% and 78.1% for the conditions stated above, respectively. The experimental yield was around 1.5% lower than that of the predicted yield. It was confirmed in this study that pentose sugars (xylose and arabinose) derived from hemicellulose fraction were further degraded. The statistical optimization method, which incorporates reaction time, temperature and acid concentration, did prove to provide a useful means of trading off the combined effects of these three variables on total xylose recovery yields.

A new functionalized ionic liquid for efficient glucose conversion to 5-hydroxymethyl furfural and levulinic acid

“…To confirm the reusability of the synthesized FILs, [ 4 ] was stable in this system. The conversion of glucose maintained at around 90% until the fifth run.…”

“…Biomass resources are promising alternatives for sustainable supply of fuels and valuable chemicals [2][3][4]. Carbohydrates derived from biomass are abundant, relatively inexpensive, and are renewable energy sources.…”

Effect of Mechanical Treatment of Eucalyptus Pulp on the Production of Nanocrystalline and Microcrystalline Cellulose

“…Hemicelluloses are low molecular weight polymers with amorphous structures that are easily solubilized [44]. Cellulose can be solubilized from amorphous regions [40], in which reaction rates are about 30 times higher than those in crystalline regions [45,46].…”

Effect of hydrogen peroxide and lead(II) nitrate on gold cyanide leaching of Malaysian mesothermal deposit gold ore

“…The statistical analysis using response surface design-central composite design (RSM-CCD) was used in this study. The RSM-CCD is a strong tool for optimizing the industrial and research processes (Um and Bae, 2011;Im et al, 2012;Asadollahzadeh et al, 2014). According to the results of pre-leaching experiments, the effect of three main factors on the percentage of gold recovery was investigated with Design Expert 11 software (State-Ease, USA).…”