Effective Gravimetric Characterization for Lignocellulosic Biomass: Comparison of NaOH-H2O2 and Ca(OH)2-H2O2 Oxidation Pretreated Sugarcane Bagasse
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In this study, alkaline peroxide oxidation
pretreatment was evaluated for sugarcane bagasse, a
lignocellulosic biomass. By comparing the effects of NaOHH2O2
and Ca(OH)2 on pretreatments at specified reaction time
periods (3, 6, 9, and 12 h) and reaction temperatures (60, 70,
80, and 90 h), optimum responses in term of cellulose content,
hemicellulose solubilization, and lignin removal were
established. Optimum pretreatment conditions of 80 oC
reaction temperature, 3 h reaction time, and 30 mL/L of water
hydrogen peroxide concentration (1%H2O2) solubilized
69.5%(w/w) hemicellulose for the sodium hydroxide peroxide
(SHP) pretreatments, 75.8%(w/w) lignin removal was also
achieved with 59.2%(w/w) cellulose retained in the solid
fraction. In addition, the responses for the optimum
conditions for the calcium hydroxide peroxide (CHP)
pretreatments, the cellulose content, hemicellulose
solubilization, and lignin removal were 50.3%, 66.6%, and
65.4%(w/w) respectively. Pretreatments showed both NaOHH2O2
and Ca(OH)2-H2O2 to be useful pretreatment agents for
the disruption of the polysaccharide complex. The study also
revealed that NaOH-H2O2 pretreatment stands as a better
choice to Ca(OH)2-H2O2 pretreatment.
Keywords
TA Engineering (General). Civil engineering (General), TP Chemical technology