Dear Deepak,

1-LIU Naian et al. have published a paper in 2003 entitled " Kinetic Compensation Effect in the Thermal Decomposition of Biomass in Air Atmosphere" which describes the compensation kinetics significance in the thermal degradation of biomass.

Abstract:

The wood and leaf samples of eight species are examined by non-isothermal means to determine the mass loss kinetics of the thermal decomposition with linear temperature programming in air atmosphere. A simple kinetic description is developed based on the experimental results and integral analysis method. In the model, the mass loss process consists of three steps. The first step corresponds to the water evaporation, and the subsequent two mass loss steps are mainly due to two major pseudo components. The two pseudo components decompose respectively at two separate temperature regions. Under this kinetic scheme, the kinetic compensation effect is analyzed and it is found that the kinetic parameters E and A resulted from the variation of the species and the variation of model functions exhibit kinetic compensation effect. Quantitative and statistical criterion to distinguish between real and false compensation effect is discussed in detail.

To view the full paper, please see the attached file.

Other papers on this topics include:

2- Significance of kinetic compensation effect in the thermal decomposition of a solid

ARTICLE in THERMOCHIMICA ACTA 135:79-84 · OCTOBER 1988

Chemistry Laboratory, Faculty of School Education, Hiroshima University, Shinonome, Minami-ku, Hiroshima, 734 Japan

Impact Factor: 2.18 · DOI: 10.1016/0040-6031(88)87369-6

ABSTRACT

A very high correlation in the logA-E plot was obtained for the nonisothermal dehydration of CaC2O4·H2O at various heating rates using the most appropriate function F(α), A1.9, estimated from isothermal analysis. Selection of the most appropriate kinetic model function and its stability under the experimental condition examined are crucial to investigate the quantitative kinetic compensation effect.

3- Kinetic compensation effect in thermal decomposition of cellulosic materials in air atmosphere

ARTICLE in JOURNAL OF APPLIED POLYMER SCIENCE 89(1):135 - 141 · JULY 2003 with 27 READS

Chinese Academy of Forestry, Peping, Beijing, China

Impact Factor: 1.77 · DOI: 10.1002/app.12132

ABSTRACT

The decomposition of wood and leaf of eight species in air atmosphere is examined by nonisothermal means with linear temperature programming, and a simple kinetic description is developed based on the experimental results and integral analysis method. The relation between the apparent activation energy E and preexponential factor A is analyzed, and it is found that the parameters E and A resulted from the variation of the species and the variation of model functions exhibit kinetic compensation effects. Quantitative and statistical criterion to distinguish between real and false compensation effects is discussed in detail. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 135–141, 2003

4-Thermal Lag, Fusion, and the Compensation Effect during Biomass Pyrolysis†

Ravi Narayan and Michael Jerry Antal , Jr.*

Hawaii Natural Energy Institute and Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822

Ind. Eng. Chem. Res., 1996, 35 (5), pp 1711–1721

DOI: 10.1021/ie950368i

Publication Date (Web): May 8, 1996

Copyright © 1996 American Chemical Society

Abstract

Results from a numerical model for endothermic biomass pyrolysis, which includes both high activation energy kinetics and heat transfer across a boundary layer to the reacting solid particle, are presented. The model accounts for conventional thermocouple thermal lag and unconventional thermal lag due to heat demand by the chemical reaction (which is governed by Arrhenius kinetics). Biomass fusion, first identified quantitatively by Lédé and Villermaux, is shown to be a manifestation of severe thermal lag that results from the chemical reaction heat demand. Over the wide range of conditions studied, the true substrate temperature remains almost constant during pyrolysis, as is the case with compounds undergoing fusion or sublimation at constant pressure. A simple algebraic model, whose derivation presupposes the idea that biomass pyrolysis mimics the melting of a block of ice, accurately predicts the maximum value of thermal lag during pyrolysis. Unidentified thermal lag in TGA experiments lowers the values of the apparent activation energy and frequency factor associated with the experimental data but approximately retains the true value of their ratio. Thus, the widely varying values of kinetic parameters for cellulose pyrolysis reported in the literature may be a result of differing thermal lag characteristics of the experiments.

5- Thermochimica Acta

Volume 35, Issue 3, 1 February 1980, Pages 389-393

 Note

Compensation effect in the thermal decomposition of cellulosic materials

Author links open the overlay panel. Numbers correspond to the affiliation list which can be exposed by using the show more link.E. Chornet, C. Roy

http://www.sciencedirect.com/science/article/pii/0040603180871401

6-KINETICS OF THE THERMAL DECOMPOSITION OF CELLULOSE

UNDER THE EXPERIMENTAL CONDITIONS OF THERMAL ANALYSIS.

THEORETICAL EXTRAPOLATIONS TO HIGH HEATING RATES.

Gábor Várhegyi and Piroska Szabó

ABSTRACT

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°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 percent 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

For full paper, please see the attached file.

Hoping this will be helpful,

Rafik

Thanks a lot Rafik. I will look at the above mentioned literature .