Thermogravimetric analysis of tobacco combustion assuming daem devolatilization and empirical char-burnoff kinetics

G. Várhegyi, Z. Czégény, Chuan Liu, Kevin Mcadam

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Two blends of tobacco (Virginia and Burley) were studied by thermogravimetry at linear and nonlinear heating programs in gas flows containing 2, 4, and 9% oxygen. A kinetic scheme of successive devolatilization and char-burnoff reactions was assumed. A distributed activation energy model was assumed for devolatilization with a Gaussian distribution and a constant preexponential factor. The evaluations were also carried out using nonconstant preexponential factors that depended on the activation energy. The char burnoff was described by first-order kinetics and by an empirical model that took into account the change of the reactivity with conversion of the sample. The dependence of the rate of combustion on the oxygen concentration was approximated by a power function. Series of 15 and 30 experiments were used for the determination of the model parameters by simultaneous least-squares evaluation of the experiments. The considerations, methods, and results can also be used in the fields of biomass gasification and combustion.

Original languageEnglish
Pages (from-to)1591-1599
Number of pages9
JournalIndustrial and Engineering Chemistry Research
Volume49
Issue number4
DOIs
Publication statusPublished - Feb 17 2010

Fingerprint

Tobacco
Thermogravimetric analysis
Kinetics
Activation energy
Oxygen
Gaussian distribution
Gasification
Flow of gases
Biomass
Experiments
Heating

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Cite this

Thermogravimetric analysis of tobacco combustion assuming daem devolatilization and empirical char-burnoff kinetics. / Várhegyi, G.; Czégény, Z.; Liu, Chuan; Mcadam, Kevin.

In: Industrial and Engineering Chemistry Research, Vol. 49, No. 4, 17.02.2010, p. 1591-1599.

Research output: Contribution to journalArticle

@article{c953cbe7f2a443989748f60eb903e166,
title = "Thermogravimetric analysis of tobacco combustion assuming daem devolatilization and empirical char-burnoff kinetics",
abstract = "Two blends of tobacco (Virginia and Burley) were studied by thermogravimetry at linear and nonlinear heating programs in gas flows containing 2, 4, and 9{\%} oxygen. A kinetic scheme of successive devolatilization and char-burnoff reactions was assumed. A distributed activation energy model was assumed for devolatilization with a Gaussian distribution and a constant preexponential factor. The evaluations were also carried out using nonconstant preexponential factors that depended on the activation energy. The char burnoff was described by first-order kinetics and by an empirical model that took into account the change of the reactivity with conversion of the sample. The dependence of the rate of combustion on the oxygen concentration was approximated by a power function. Series of 15 and 30 experiments were used for the determination of the model parameters by simultaneous least-squares evaluation of the experiments. The considerations, methods, and results can also be used in the fields of biomass gasification and combustion.",
author = "G. V{\'a}rhegyi and Z. Cz{\'e}g{\'e}ny and Chuan Liu and Kevin Mcadam",
year = "2010",
month = "2",
day = "17",
doi = "10.1021/ie901180d",
language = "English",
volume = "49",
pages = "1591--1599",
journal = "Industrial & Engineering Chemistry Product Research and Development",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "4",

}

TY - JOUR

T1 - Thermogravimetric analysis of tobacco combustion assuming daem devolatilization and empirical char-burnoff kinetics

AU - Várhegyi, G.

AU - Czégény, Z.

AU - Liu, Chuan

AU - Mcadam, Kevin

PY - 2010/2/17

Y1 - 2010/2/17

N2 - Two blends of tobacco (Virginia and Burley) were studied by thermogravimetry at linear and nonlinear heating programs in gas flows containing 2, 4, and 9% oxygen. A kinetic scheme of successive devolatilization and char-burnoff reactions was assumed. A distributed activation energy model was assumed for devolatilization with a Gaussian distribution and a constant preexponential factor. The evaluations were also carried out using nonconstant preexponential factors that depended on the activation energy. The char burnoff was described by first-order kinetics and by an empirical model that took into account the change of the reactivity with conversion of the sample. The dependence of the rate of combustion on the oxygen concentration was approximated by a power function. Series of 15 and 30 experiments were used for the determination of the model parameters by simultaneous least-squares evaluation of the experiments. The considerations, methods, and results can also be used in the fields of biomass gasification and combustion.

AB - Two blends of tobacco (Virginia and Burley) were studied by thermogravimetry at linear and nonlinear heating programs in gas flows containing 2, 4, and 9% oxygen. A kinetic scheme of successive devolatilization and char-burnoff reactions was assumed. A distributed activation energy model was assumed for devolatilization with a Gaussian distribution and a constant preexponential factor. The evaluations were also carried out using nonconstant preexponential factors that depended on the activation energy. The char burnoff was described by first-order kinetics and by an empirical model that took into account the change of the reactivity with conversion of the sample. The dependence of the rate of combustion on the oxygen concentration was approximated by a power function. Series of 15 and 30 experiments were used for the determination of the model parameters by simultaneous least-squares evaluation of the experiments. The considerations, methods, and results can also be used in the fields of biomass gasification and combustion.

UR - http://www.scopus.com/inward/record.url?scp=77649176529&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77649176529&partnerID=8YFLogxK

U2 - 10.1021/ie901180d

DO - 10.1021/ie901180d

M3 - Article

AN - SCOPUS:77649176529

VL - 49

SP - 1591

EP - 1599

JO - Industrial & Engineering Chemistry Product Research and Development

JF - Industrial & Engineering Chemistry Product Research and Development

SN - 0888-5885

IS - 4

ER -