Removal of oil palm trunk lignin in ammonium hydroxide pretreatment

Alkaline pretreatment using ammonium hydroxide, NH4OH serves as one of a process to remove lignin from lignocellulosic biomass such as oil palm trunk fiber. In this study, the effect of NH4OH pretreatment on removal of oil palm trunk lignin was investigated. The oil palm trunk fiber was dissolved in NH4OH with different concentrations (6, 8 and 10 %), different duration (3, 5 and 7 h) and temperatures (60, 80 and 100 °C). The samples were analyzed by using UV-Vis to estimate the concentration of extracted lignin. The result indicates that the optimum conditions to gain maximum extracted lignin were 8% NH4OH, 100 °C and 5 h with concentration of 64 mgL-1 while the lowest was at 6% NH4OH, 100 °C and 5 h with concentration of 62.5 mgL−1.Alkaline pretreatment using ammonium hydroxide, NH4OH serves as one of a process to remove lignin from lignocellulosic biomass such as oil palm trunk fiber. In this study, the effect of NH4OH pretreatment on removal of oil palm trunk lignin was investigated. The oil palm trunk fiber was dissolved in NH4OH with different concentrations (6, 8 and 10 %), different duration (3, 5 and 7 h) and temperatures (60, 80 and 100 °C). The samples were analyzed by using UV-Vis to estimate the concentration of extracted lignin. The result indicates that the optimum conditions to gain maximum extracted lignin were 8% NH4OH, 100 °C and 5 h with concentration of 64 mgL-1 while the lowest was at 6% NH4OH, 100 °C and 5 h with concentration of 62.5 mgL−1.

[1]  Jie Yu,et al.  Cellulose, xylan and lignin interactions during pyrolysis of lignocellulosic biomass , 2017 .

[2]  P. Keshav,et al.  Bioconversion of alkali delignified cotton stalk using two-stage dilute acid hydrolysis and fermentation of detoxified hydrolysate into ethanol , 2016 .

[3]  E. Fortunati,et al.  Effect of cellulose and lignin on disintegration, antimicrobial and antioxidant properties of PLA active films. , 2016, International journal of biological macromolecules.

[4]  Carlos Martín,et al.  Pretreatment of lignocellulose: Formation of inhibitory by-products and strategies for minimizing their effects. , 2016, Bioresource technology.

[5]  O. Sulaiman,et al.  Isolation and characterization of cellulose nanocrystals from parenchyma and vascular bundle of oil palm trunk (Elaeis guineensis). , 2015, Carbohydrate polymers.

[6]  H. Gruppen,et al.  Importance of acid or alkali concentration on the removal of xylan and lignin for enzymatic cellulose hydrolysis. , 2015 .

[7]  J. Labidi,et al.  Influence of Reaction Conditions on Lignin Hydrothermal Treatment , 2014, Front. Energy Res..

[8]  M. Islam,et al.  Natural weathering studies of oil palm trunk lumber (OPTL) green polymer composites enhanced with oil palm shell (OPS) nanoparticles , 2013, SpringerPlus.

[9]  Roland Lee,et al.  UV-Vis as quantification tool for solubilized lignin following a single-shot steam process. , 2013, Bioresource technology.

[10]  R. Sun,et al.  Chemical, structural, and thermal characterizations of alkali-soluble lignins and hemicelluloses, and cellulose from maize stems, rye straw, and rice straw , 2001 .