title: Optimization and kinetic analysis on the sulfuric acid - Catalyzed depolymerization of wheat straw.
abstract: The objectives of this work were to optimize the experimental condition and to study the kinetic behavior of wheat straw depolymerization with sulfuric acid (2 wt%, 3 wt%, and 4 wt%) at different temperatures (120°C, 130°C, and 140°C). The two-fraction kinetic model was obtained for the prediction of the generations of product and by-product during depolymerization. The kinetic parameters of the two-fraction model were analyzed using an Arrhenius-type equation. Applying the kinetic two-fraction model, the optimum condition for wheat straw depolymerization was 3 wt% H2SO4 at 130°C for 75 min, which yielded a high concentration of fermentable sugars (xylose 8.934 g/L, glucose 1.363 g/L, and arabinose 1.203 g/L) and low concentrations of microbial inhibitors (furfural 0.526 g/L and acetic acid 1.192 g/L). These results suggest that the model obtained in this study can satisfactorily describe the formation of degradation products and the depolymerization mechanism of wheat straw.
authors.affiliation: College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China; State Key Laboratory Cultivation Base of Energy Sources and Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: wuqianqian_nx@sohu.com.
authors.forename: Qian-Qian
authors.initials: QQ
authors.lastname: Wu
authors.affiliation: College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China; State Key Laboratory Cultivation Base of Energy Sources and Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: nxylma@163.com.
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Ma
authors.affiliation: College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China; State Key Laboratory Cultivation Base of Energy Sources and Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: changx@nxu.edu.cn.
authors.forename: Xuan
authors.initials: X
authors.lastname: Chang
authors.affiliation: College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China; State Key Laboratory Cultivation Base of Energy Sources and Chemical Engineering, Ningxia University, Yinchuan 750021, China. Electronic address: yonggangsun_nx@sohu.com.
authors.forename: Yong-Gang
authors.initials: YG
authors.lastname: Sun
mesh_terms: D002236:Carbohydrate Conformation; D002384:Catalysis; D005662:Furaldehyde / Q000032:analysis; D007700:Kinetics; D058105:Polymerization; D013464:Sulfuric Acids / Q000737:chemistry*; D014908:Triticum / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis*; D014994:Xylose / Q000032:analysis
chemical_list: D013464:Sulfuric Acids; D014866:Waste Products; D014994:Xylose; D005662:Furaldehyde; C033158:sulfuric acid
keywords: Acid catalysis; Depolymerization; Kinetic model; Sulfuric acid; Wheat straw