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Comprehensive utilization of the hydrolyzed productions from rice hull

Author:
Ma, Yuejia, Zhao, Xu, Zhang, Hong, Wang, Zichen
Source:
Industrial crops and products 2011 v.33 no.2 pp. 403-408
ISSN:
0926-6690
Subject:
X-ray diffraction, byproducts, cellulose, glucose, hydrolysis, neutralization, photographs, powders, raw materials, rice hulls, scanning electron microscopy, silica, sodium sulfate, temperature
Abstract:
The study based on pretreatment, hydrolyzation and separation processes with the raw material rice hull, provides a comprehensive utilization of the hydrolyzed productions, such as glucose (C₆H₁₂O₆) from cellulose, silica (SiO₂), and byproduct crystalline sodium sulfate (Na₂SO₄·10H₂O). The optimum hydrolysis conditions are as follows: the concentration of H₂SO₄ is 72% (wt.%), the temperature is 50°C, the ratio of H₂SO₄ solution volume (mL) to the rice hull mass (g) is 10:1 and the time is 5min, the glucose yield rate reaches 45.6% (wt.%). The concentration of glucose solution could be 0.1g/mL after neutralization measured by ultraviolet spectrophotometer (UV–VIS). Silica powder was below 50nm characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The main byproduct crystalline sodium sulfate was featured by XRD and photographs.
Agid:
425209