Pyrolysis kinetics of acid-leached rice husk

被引：115

作者：

Liou, TH ^{[1
]}

Chang, FW ^{[1
]}

Lo, JJ ^{[1
]}

机构：

[1] NATL CENT UNIV,DEPT CHEM ENGN,CHUNGLI 32054,TAIWAN

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1997年 / 36卷 / 03期

关键词：

D O I：

10.1021/ie9604536

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A highly pure mixture of carbon and silica was obtained on pyrolysis rice husk leached with acid at high temperature in a nonoxidizing atmosphere. The product was suitable for use as a starting material in the the manufacture of silicon nitride powder. The effect of treatment including the kind and concentration of acid and the pyrolysis temperature on the constituents of the specimen was presented. Kinetic tests on pyrolysis of rice husk in a nitrogen atmosphere were carried out with a thermal gravimetric analysis (TGA) technique at heating rates 2, 3, and 5 k/min. The results indicated that thermal degradation of rice husk consisted of two distinct pyrolysis stages. The corresponding kinetic parameters including the activation energy were determined. A reasonable pyrolysis mechanism was proposed, which agreed satisfactorily with the experimental results.

引用

页码：568 / 573

页数：6