KINETICS OF THE THERMAL-DECOMPOSITION OF CELLULOSE UNDER THE EXPERIMENTAL CONDITIONS OF THERMAL-ANALYSIS - THEORETICAL EXTRAPOLATIONS TO HIGH HEATING RATES

被引：38

作者：

VARHEGYI, G

SZABO, P

ANTAL, MJ

机构：

[1] Hungarian Academy of Sciences, Research Laboratory for Inorganic Chemistry, Budapest, 1518

[2] Hawaii Natural Energy Institute, the Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu

来源：

BIOMASS & BIOENERGY | 1994年 / 7卷 / 1-6期

关键词：

CELLULOSE; BIOMASS; THERMAL DECOMPOSITION; THERMOGRAVIMETRY; PYROLYSIS; REACTION KINETICS; KINETIC COMPENSATION EFFECT;

D O I：

10.1016/0961-9534(95)92631-H

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Thermobalance-mass spectrometer (TG-MS) experiments carried out by the authors in a period of 8 years are reviewed and analyzed. Celluloses and lignocellulosic biomass samples were studied. The data are evaluated by the method of least squares. The results indicate that a single rate-controlling reaction step dominates the kinetics of the cellulose decomposition at low heating rates (2-20 degrees C/min) provided that the heat and mass transport problems are experimentally eliminated and the amount of catalytic impurities is reduced by dilute acid or hot water washing treatments. The kinetic parameters obtained from the experiments with different cellulose and biomass samples evidenced only ca 8% scattering. A simple explanation is given for the kinetic compensation effect observed. Theoretical extrapolations are presented to predict the behavior of extremely small, idealized cellulose samples at high heating rates.

引用

页码：69 / 74

页数：6

共 13 条

[11]

Patt, Kordaschia, Herstellung von Zellstoffen unter Verwendung von alkalischen Sulfitlösungen mit Zusatz von Anthrachinon und Methanol, Das Papier, 40, 10 A, pp. V1-V8, (1986)

[12]

Varhegyi, Szekely, Reaction kinetics in thermal analysis: the sensitivity of kinetic equations to experimental errors, A mathematical analysis, 57, pp. 13-28, (1982)

[13]

Sestak, On the applicability of the p(x)-function to the determination of reaction kinetics under non-isothermal conditions, Thermochimica Acta, 3, pp. 150-154, (1971)

← 1 2 →