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Citation: WU Qianqian, CHANG Xuan, MA Yulong. Depolymerization Products and Kinetics of Wheat Straw Using Different Acids[J]. Chinese Journal of Applied Chemistry, ;2015, 32(7): 794-800. doi: 10.11944/j.issn.1000-0518.2015.07.140414 shu

Depolymerization Products and Kinetics of Wheat Straw Using Different Acids

WU Qianqian ^a ,
CHANG Xuan ^a ,
MA Yulong ^a,b,,

1.
a College of Chemistry & Chemical Engineering, Ningxia University, Yinchuan 750021, China;
2.
b State Key Laboratory Cultivation Base of Energy Sources and Chemical Engineering, Ningxia University, Yinchuan 750021, China

Corresponding author: MA Yulong,
Received Date: 2 December 2014
Available Online: 5 February 2015
Fund Project: 国家自然科学基金资助项目(21266023) (21266023)

The products of wheat straw treated with hydrochloric acid,nitric acid,and phosphoric acid were analyzed and the kinetics of production of xylose and furfural during depolymerization were studied.The results show that the products in the depolymerized wheat straw are glucose,xylose,arabinose,acetic acid,cellobiose,furfural,and 5-hydroxymethyl furfural.The rate constants of xylan hydrolysis,xylose conversion and furfural formation at different temperatures were obtained using the modified Saeman model by introducing a variable (α,the ratio of xylose and arabinose).The activation energies of xylose formation with the tested acids (HCl,HNO₃,and H₃PO₄) are 55.5 k J/mol,46.3 k J/mol,and 59.8 k J/mol,respectively.Combined with reaction temperature,time,the reaction rate,and the concentration of xylose and furfural,the optimized acid treatment for wheat straw is HNO₃ depolymerization at 130℃ for 95 min.
- wheat straw,
- product analysis,
- depolymerization,
- acid,
- kinetic
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