Establishment and verification of a shrinking core model for dilute acid hydrolysis of lignocellulose

2012年第6卷第4期

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《能源前沿（英文）》 >> 2012年第6卷第4期 doi: 10.1007/s11708-012-0212-z

Establishment and verification of a shrinking core model for dilute acid hydrolysis of lignocellulose

Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430074, China

发布日期： 2012-12-05

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摘要

The kinetics of lignocellulose hydrolysis under the conditions of high temperature and dilute acid (mass fraction 0.05%) was investigated in this paper. By studying the reducing sugar concentration versus reaction temperature (170°C–220°C) and reaction time (150–1800 s) during the hydrolysis process of five kinds of crop straw (rice, wheat, cotton, rape and corn), the shrinking core model was established, and the differential equation of the model and its analytical solution were obtained. With a numerical calculation method, the kinetic equation was estimated, and the degradation of reducing sugar obeyed first-order kinetics was obtained. The calculated results from the equations agreed well with the original experimental data. The calculation by the model showed that the reducing sugar concentration increases as the size of the particles decrease, and the uniform particles increase.

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lignocellulose ; dilute acid hydrolysis ; shrinking core model