TY - JOUR
T1 - Conversion of cellulose from sweet sorghum (Sorghum bicolor) bagasse to levulinic acid over hierarchical Mn/ZSM-5 heterogeneous catalyst
AU - Nurani, D. A.
AU - Krisnandi, Y. K.
AU - Simanjuntak, M. B.
AU - Rahayu, D. U.C.
AU - Saepudin, E.
N1 - Publisher Copyright:
© 2020 Published under licence by IOP Publishing Ltd.
PY - 2020/4/28
Y1 - 2020/4/28
N2 - The non-food biomass, sweet sorghum (Sorghum bicolor) bagasse (SSB), can be a possible source for synthesis of platform chemical such as levulinic acid (LA). It contains high sugar derived from cellulose and hemicellulose. Delignification process of SSB becomes important due to accessibility to those sugars. In this work, the effect of different chemical pretreatments on the delignification process was studied, including alkali pretreatment (NaOH) and oxidative pretreatment (NaOCl2). The products were characterized by Fourier Transform Infrared (FTIR) and X-Ray Diffraction (XRD). The pretreated SSB was then converted into LA using hierarchical Mn/ZSM-5 heterogeneous catalyst at 100 °C with various concentrations of phosphoric acid and fixed concentration of hydrogen peroxide. The conversion reaction was based on Fenton-like reaction. Quantitative analysis of the products was performed using High Performance Liquid Chromatography (HPLC). The result shows that lignin content was significantly reduced from 28.42 % to 16.81 % using 10 % NaOH. Alkali pretreatment on SSB also produces higher yield of LA than oxidative pretreatment. The optimum % yield of LA 14.37 % was achieved using derived cellulose in alkali pretreatment in reaction condition 30 % of H3PO4 (v/v), 30 % H2O2 (v/v), and 10 % of Mn/ZSM-5 at 100 °C for 10 h reaction time. The catalyst shows good selectivity to LA due to the absence of HMF as intermediate. Beside LA, formic acid and acetic acid were also found in the conversion products.
AB - The non-food biomass, sweet sorghum (Sorghum bicolor) bagasse (SSB), can be a possible source for synthesis of platform chemical such as levulinic acid (LA). It contains high sugar derived from cellulose and hemicellulose. Delignification process of SSB becomes important due to accessibility to those sugars. In this work, the effect of different chemical pretreatments on the delignification process was studied, including alkali pretreatment (NaOH) and oxidative pretreatment (NaOCl2). The products were characterized by Fourier Transform Infrared (FTIR) and X-Ray Diffraction (XRD). The pretreated SSB was then converted into LA using hierarchical Mn/ZSM-5 heterogeneous catalyst at 100 °C with various concentrations of phosphoric acid and fixed concentration of hydrogen peroxide. The conversion reaction was based on Fenton-like reaction. Quantitative analysis of the products was performed using High Performance Liquid Chromatography (HPLC). The result shows that lignin content was significantly reduced from 28.42 % to 16.81 % using 10 % NaOH. Alkali pretreatment on SSB also produces higher yield of LA than oxidative pretreatment. The optimum % yield of LA 14.37 % was achieved using derived cellulose in alkali pretreatment in reaction condition 30 % of H3PO4 (v/v), 30 % H2O2 (v/v), and 10 % of Mn/ZSM-5 at 100 °C for 10 h reaction time. The catalyst shows good selectivity to LA due to the absence of HMF as intermediate. Beside LA, formic acid and acetic acid were also found in the conversion products.
KW - heterogeneous catalyst
KW - hierarchical Mn/ZSM-5
KW - levulinic acid (LA)
KW - sweet sorghum bagasse (SSB)
UR - http://www.scopus.com/inward/record.url?scp=85084298723&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/763/1/012043
DO - 10.1088/1757-899X/763/1/012043
M3 - Conference article
AN - SCOPUS:85084298723
SN - 1757-8981
VL - 763
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012043
T2 - 3rd International Symposium on Current Progress in Functional Materials 2018, ISCPFM 2018
Y2 - 8 August 2018 through 9 August 2018
ER -