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Title: Effect of heating rate on pyrolysis kinetics of Tuncbilek lignite

Abstract

Pyrolysis kinetics of the Tuncbilek lignite was investigated by thermogravimetric analysis in the present study. All experiments were conducted at nonisothermal conditions with a heating rate range of 10--80 K/min in the pyrolysis temperature interval 298--1,173 K under argon atmosphere. Although some differences were obtained in TG/DTG curves of the lignite samples at different heating rates, the same volatile matter yield of 40.7% of the total weight of the sample was calculated in the same temperature range of 673--873 K of the TG curves. Kinetic parameters were determined with the use of the proposed model. A comparison of the experimental and model values of the weight of lignite at any time was presented. Lower activation energies were calculated at higher heating rates for Tuncbilek lignite. Minimum activation energy was obtained as 24.8 kJ/mol at the heating rate value of 60 K/min. It appears to be the lowest one when compared to those obtained from the literature.

Authors:
; ;
Publication Date:
Research Org.:
Hacettepe Univ., Ankara (TR)
OSTI Identifier:
20020926
Alternate Identifier(s):
OSTI ID: 20020926
Resource Type:
Journal Article
Journal Name:
Energy Sources
Additional Journal Information:
Journal Volume: 22; Journal Issue: 4; Other Information: PBD: May 2000; Journal ID: ISSN 0090-8312
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; LIGNITE; PYROLYSIS; HEATING RATE; CHEMICAL REACTION KINETICS; DEVOLATILIZATION; KINETIC EQUATIONS; ACTIVATION ENERGY

Citation Formats

Gueldogan, Y., Bozdemir, T.O., and Durusoy, T. Effect of heating rate on pyrolysis kinetics of Tuncbilek lignite. United States: N. p., 2000. Web. doi:10.1080/00908310050013901.
Gueldogan, Y., Bozdemir, T.O., & Durusoy, T. Effect of heating rate on pyrolysis kinetics of Tuncbilek lignite. United States. doi:10.1080/00908310050013901.
Gueldogan, Y., Bozdemir, T.O., and Durusoy, T. Mon . "Effect of heating rate on pyrolysis kinetics of Tuncbilek lignite". United States. doi:10.1080/00908310050013901.
@article{osti_20020926,
title = {Effect of heating rate on pyrolysis kinetics of Tuncbilek lignite},
author = {Gueldogan, Y. and Bozdemir, T.O. and Durusoy, T.},
abstractNote = {Pyrolysis kinetics of the Tuncbilek lignite was investigated by thermogravimetric analysis in the present study. All experiments were conducted at nonisothermal conditions with a heating rate range of 10--80 K/min in the pyrolysis temperature interval 298--1,173 K under argon atmosphere. Although some differences were obtained in TG/DTG curves of the lignite samples at different heating rates, the same volatile matter yield of 40.7% of the total weight of the sample was calculated in the same temperature range of 673--873 K of the TG curves. Kinetic parameters were determined with the use of the proposed model. A comparison of the experimental and model values of the weight of lignite at any time was presented. Lower activation energies were calculated at higher heating rates for Tuncbilek lignite. Minimum activation energy was obtained as 24.8 kJ/mol at the heating rate value of 60 K/min. It appears to be the lowest one when compared to those obtained from the literature.},
doi = {10.1080/00908310050013901},
journal = {Energy Sources},
issn = {0090-8312},
number = 4,
volume = 22,
place = {United States},
year = {2000},
month = {5}
}