OBTAINING HEMICELLULOSE FROM CORN STALKS
Nowadays, agricultural wastes represent an alternative source of renewable raw materials. Different processes could be applied to these alternative materials to separate its components and obtain chemical products with high added value such as bioethanol, organic acids, monomers and biopolymers. The main objective of this work is to study the extraction of hemicelluloses from corn stalks by acid or basic catalyst H2SO4, HNO3, HCL, CH3COOH, CF3COOH, Ca(OH)2, NaOH adjusting solution pH to 4 or 8 with these reagents. The raw material was characterized and fractionated with autoclave hydrolysis processes (121℃, 1:20 solid/liquid ratio, 60 min, pH = 4 or 8). Monomeric sugars concentration, TDS, MO, MI, density and final pH of the hydrolysate were determined. Hemicelluloses were precipitated and analyzed by different techniques (FTIR, TGA and GPC). The highest yield of hemicelluloses extraction was achieved by sulphuric acid (0.98 g/L total sugar content) and the less effective reagent was Ca(OH)2 (0.52 g/L total sugar content).
corn stalk hydrolysis catalysts hemicelluloses
Cristina Sánchez Itziar Egüés I(n)aki Mondragón Jalel Labidi
Materials + Technology Group, Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa, 1, 20018, Donostia-San Sebastián, Spain
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1061-1066
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）