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Modelling of the hydrolysis of sorghum straw at atmospheric pressure
Author(s) -
TéllezLuis Simón J,
Ramírez José A,
Vázquez Manuel
Publication year - 2002
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.1072
Subject(s) - furfural , xylose , straw , hydrolysis , chemistry , acetic acid , sorghum , enzymatic hydrolysis , pulp and paper industry , food science , fermentation , biochemistry , agronomy , catalysis , inorganic chemistry , biology , engineering
Sorghum straw is a renewable, cheap and widespread resource. The acid hydrolysis of sorghum straw to obtain xylose solutions could be a good alternative for this abundant resource. The H 2 SO 4 hydrolysis of sorghum straw at two different temperatures (80 and 100 °C) and three H 2 SO 4 concentrations (2, 4 and 6%) using a solid/liquid ratio of 1:10 (w/w) was studied. Kinetic parameters of mathematical models for predicting the concentrations of xylose, glucose, acetic acid and furfural were determined. The activation energy of the release reaction was 183.3 kJ mol −1 for xylose and 185.8 kJ mol −1 for glucose. The optimal conditions found were 6% H 2 SO 4 at 100 °C for 60 min, which allow one to obtain a solution with 18.27 g xylose l −1 , 6.78 g glucose l −1 , 0.7 g furfural l −1 and 1.35 g acetic acid l −1 . It is concluded that this process has potential for utilisation of this renewable lignocellulosic resource. © 2002 Society of Chemical Industry