European Journal of Chemistry 2015, 6(2), 199-203. doi:10.5155/eurjchem.6.2.199-203.1249

Non-isothermal decomposition kinetics of theobromine in nitrogen atmosphere


Laila Tosson Kamel (1,*)

(1) Narcotic Department, National Center for Social and Criminal Research, Giza, 11561, Egypt
(*) Corresponding Author

Received: 21 Jan 2015, Accepted: 22 Mar 2015, Published: 30 Jun 2015

Abstract


The non-isothermal decomposition process of theobromine under nitrogen atmosphere was studied using the differential thermal analysis (DTA), from room temperature up to 500 °C, at heating rates, 5, 15 and 20 °C/min. The results showed that theobromine decomposes in two steps. The kinetic analysis of the first decomposition step was performed using Kissinger, Friedman, Flynn-Wall-Ozawa, and Kissinger-Akahira-Sunose isoconventional methods. The kinetic model was determined using Šatava-Šesták method. Results showed that the non-isothermal decomposition mechanism of theobromine corresponds to nucleation and growth, following the Avrami-Erofeev equation. The forms of the integral and differential equations for the mechanism function are g(α)=(-ln(1-α))2/3 and f(α)=(3/2)(1-α)(-ln(1-α))1/3, respectively. Thermodynamic parameters of the non-isothermal decomposition process, change of enthalpy (ΔH), change of entropy (ΔS), and change of Gibbs free energy (ΔG) values were calculated.


Keywords


Theobromine; Šatava-Šesták method; Thermal decomposition; Thermodynamic parameters; Linear isoconversional methods; Non‐isothermal kinetic parameters

Full Text:

PDF /    /


DOI: 10.5155/eurjchem.6.2.199-203.1249

Article Metrics


This Abstract was viewed 491 times | PDF Article downloaded 226 times

Citations

/


[1]. Paweł J. Andruszkiewicz, Roy N. D’Souza, Irem Altun, Marcello Corno, Nikolai Kuhnert
Thermally-induced formation of taste-active 2,5-diketopiperazines from short-chain peptide precursors in cocoa
Food Research International  121, 217, 2019
DOI: 10.1016/j.foodres.2019.03.015
/


[2]. Ganesan Nalini, Natesan Jayachandramani, Radhakrishnan Suresh, Venugopal Thanikachalam, Govindasamy Manikandan
Synthesis, characterization and thermal decomposition of 2’-amino-6’-(1H-indol-3-yl)-1-methyl-2-oxospiro-[indoline-3,4’-pyran]-3’,5’-dicarbonitrile under non-isothermal condition in nitrogen atmosphere
European Journal of Chemistry  7(3), 380, 2016
DOI: 10.5155/eurjchem.7.3.380-386.1442
/


[3]. Ganesan Nalini, Natesan Jayachandramani, Radhakrishnan Suresh, Prakasam Thirumurugan, Venugopal Thanikachalam, Govindasamy Manikandan, Dharmalingam Sankari
Synthesis, characterization and thermal decomposition of ethyl-2’-amino-5’-cyano-6’-(1H-indole-3yl)-2-oxospiro[indoline-3,4’-pyran]-3’-carboxylate under non‐isothermal condition in nitrogen atmosphere
European Journal of Chemistry  10(1), 72, 2019
DOI: 10.5155/eurjchem.10.1.72-81.1812
/


References

[1]. De Sena, A. R.; Aparecida, A. S.; Branco, A. Food Technol. Biotech. 2011, 49, 413-423.

[2]. Mitchell, E. S.; Slettenaar, M.; Vd Meer, N.; Transler, C.; Jans, L.; Quadt, F.; Berry, M. Physiol. Behav. 2011, 104, 816-822.
http://dx.doi.org/10.1016/j.physbeh.2011.07.027

[3]. Wesolowski, M.; Szynkaruk, P. J. Therm. Anal. Calorim. 2001, 65, 599-605.
http://dx.doi.org/10.1023/A:1017962027407

[4]. Wesolowski, M.; Szynkaruk, P. J. Therm. Anal. Calorim. 2008, 93, 739-746.
http://dx.doi.org/10.1007/s10973-008-9138-4

[5]. Li, X. Y.; Wu, Y. Q.; Gu, D. H.; Gan, F. X. Thermochim. Acta 2009, 493, 85-89.
http://dx.doi.org/10.1016/j.tca.2009.04.010

[6]. Rotaru, A.; Anca, M.; Popa, G.; Rotaru, P.; Segal, E. J. Therm. Anal. Calorim. 2009, 97, 485-491.
http://dx.doi.org/10.1007/s10973-009-0214-1

[7]. Rotaru, A.; Kropidlowska, A.; Anca, M. J. Therm. Anal. Calorim. 2008, 92, 233-238.
http://dx.doi.org/10.1007/s10973-007-8815-z

[8]. Kissinger, H. E. J. Res. Nat. Bur. Stand. 1956, 57, 217-221.
http://dx.doi.org/10.6028/jres.057.026

[9]. Kissinger, H. E. Anal. Chem. 1957, 29, 1702-1706.
http://dx.doi.org/10.1021/ac60131a045

[10]. Friedman, H. L. J. Polym. Sci. Part C 1964, 6, 183‐195.
http://dx.doi.org/10.1002/polc.5070060121

[11]. Flynn, J. H.; Wall, L. A. J. Ploym. Sci. B 1966, 4, 325-328.

[12]. Ozawa, T. B. Chem. Soc. Jpn. 1965, 38, 1881-1886.
http://dx.doi.org/10.1246/bcsj.38.1881

[13]. Akahira, T.; Sunose, T. Res. Rep. Chiba Inst. Technol. 1971, 16, 22‐31.

[14]. Satava, F.; Sestak, J. J. Therm. Anal. Calorim. 1975, 8, 477-489.
http://dx.doi.org/10.1007/BF01910127

[15]. Huang, M.; Lv, S.; Zhou, C. Thermochim. Acta 2013, 552, 60-64.
http://dx.doi.org/10.1016/j.tca.2012.11.006

[16]. Hu, R. Z.; Shi, Q. Z. Thermal Dynamics, Science Press, Beijing, China, 2008, pp. 62-64 (Chapter 4).

[17]. Ma, H. X.; Yan, B.; Li, Z. N.; Song, J. R.; Hu, R. Z. J. Therm. Anal. Calorim. 2009, 95, 437-444.
http://dx.doi.org/10.1007/s10973-008-9255-0

[18]. Boonchom, B. J. Therm. Anal. Calorim. 2010, 31, 416-429.

[19]. Janković, B.; Mentus, S.; Jelić, D. Physica B 2009, 404, 2263-2269.
http://dx.doi.org/10.1016/j.physb.2009.04.024


How to cite


Kamel, L. Eur. J. Chem. 2015, 6(2), 199-203. doi:10.5155/eurjchem.6.2.199-203.1249
Kamel, L. Non-isothermal decomposition kinetics of theobromine in nitrogen atmosphere. Eur. J. Chem. 2015, 6(2), 199-203. doi:10.5155/eurjchem.6.2.199-203.1249
Kamel, L. (2015). Non-isothermal decomposition kinetics of theobromine in nitrogen atmosphere. European Journal of Chemistry, 6(2), 199-203. doi:10.5155/eurjchem.6.2.199-203.1249
Kamel, Laila. "Non-isothermal decomposition kinetics of theobromine in nitrogen atmosphere." European Journal of Chemistry [Online], 6.2 (2015): 199-203. Web. 21 Sep. 2019
Kamel, Laila. "Non-isothermal decomposition kinetics of theobromine in nitrogen atmosphere" European Journal of Chemistry [Online], Volume 6 Number 2 (30 June 2015)

DOI Link: https://doi.org/10.5155/eurjchem.6.2.199-203.1249

Refbacks

  • There are currently no refbacks.




Copyright (c)




© Copyright 2019  Atlanta Publishing House LLC All Right Reserved.

The opinions expressed in all articles published in European Journal of Chemistry are those of the specific author(s), and do not necessarily reflect the views of Atlanta Publishing House LLC, or European Journal of Chemistry, or any of its employees.

Copyright 2019 Atlanta Publishing House LLC. All rights reserved. This site is owned and operated by Atlanta Publishing House LLC whose registered office is 4614 Lavista road, Tucker, GA, 30084, USA. Registered in USA.