Influence of microwave heating on the liquefaction kinetics of corn stover in ethylene glycol

被引：0

作者：

机构：

[1] College of Engineering, China Agricultural University, Beijing 100083

来源：

Xiao, W. (xwhddd@163.com) | 1600年 / North Carolina State University卷 / 08期

关键词：

Corn stover; Kinetics; Liquefaction; Microwave;

D O I：

10.15376/biores.8.3.3453-3460

中图分类号：

学科分类号：

摘要：

The microwave liquefaction kinetics of corn stover in the presence of ethylene glycol (EG) using sulfuric acid as a catalyst was studied. The liquefaction apparent rate constant (k) was examined using a first-order reaction model. The k values of corn stover increased from 0.080 min-1 to 0.165 min-1, with the reaction temperature increasing from 120 °C to 180 °C. The k value of cellulose at 160 °C was close to that of corn stover, indicating that cellulose was involved in the rate-determining step in the microwave liquefaction. The microwave liquefaction rate of corn stover at 160 °C was seven times greater than that of conventional liquefaction with external heating. The apparent activation energy (Ea) was 22.6 kJ mol-1 and the frequency factor (A) was found to be 12.98×105 s-1. The decrease in apparent activation energy and the increase in the frequency factor as compared to conventional liquefaction kinetic parameters indicates a non-thermal effect of microwave in the liquefaction of corn stover, which explains the acceleration mechanism of liquefaction with microwaves.

引用

页码：3453 / 3460

页数：7

共 18 条

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