Skip to main content
SpringerLink
Log in

Effect of the dispersity of substances on the macrokinetics of thermal analysis under non-isothermal conditions

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

The effect of the dispersity of the sample on the topochemical mechanism and on the kinetic parameters of thermolysis (A s→Bs + Cg) under non-isothermal conditions is discussed. For correctness of the experiment, a ratio of maximum and minimum particle diameters ≤ 6 is a necessary condition. The topochemical mechanism of the process should be determined separately for the initial and final stages.

Résumé

L'effet de la dispersion de l'échantillon sur le mécanisme topochimique et sur les paramètres cinétiques de la thermolyse (As→ Bs + Cg) en conditions non-isothermes est discuté. La conditions nécessaire pour qu'une expérience soit correcte est que le rapport entre les valeurs maximale et minimale des diamètres des particules soit ≤6. Le mécanisme topochimique du processus devrait être déterminé séparément pour les étapes initiale et finale.

Zusammenfassung

Die Wirkung der Dispersion der Probe auf den topochemischen Mechanismus und die kinetischen Parameter der Thermolyse (As → Bs + Cg) unter nichtisothermen Bedingungen wird diskutiert. Die Genauigkeit des Experiments setzt ein Verhältnis der maximalen und minimalen Teilchendurchmesser von ≤6 voraus. Der topochemische Mechanismus sollte für die Anfangs- und Endphase des Vorganges einzeln bestimmt werden.

Резюме

Рассмотрено влияние дисперсности образц а на топохимический меха низм и кинетические параме тры термолиза (A тв →В тв +С газ) в неизотермиче ских условиях. Для корректного эксп еримента допустимым является отношение размеров м аксимального и минимального зернаd макс./d мин⩽6; топохимический меха низм процесса должен определяться определяться отдельно для начальн ой и конечной стадий.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. B.Delmon, Introduction à la cinétique hétérogène, Paris 1969.

  2. P.Barret, Cinétique hétérogène, Paris, 1973.

  3. E. A.Prodan, M. M.Pavlyuchenko and S. A.Prodan, Zakonomernosti topokhimicheskikh reaktsy (Laws of topochemical reactions), Minsk, 1976.

  4. V. P. Ivanova, B. K. Kasatov, T. H. Krasavina andE. D. Rozinova, Termichesky analiz mineralov i gornykh porod (Thermal analysis of minerals and rocks)., Izd. Nedra, Leningrad, 1974.

    Google Scholar 

  5. S. R. Dharwankar andM. D. Karhanavala, J. Indian Chem. Soc., 45 (1968) 490.

    Google Scholar 

  6. A. V. Shkarin, N. D. Topor andG. M. Zhabrova, Zh. fiz. khimii, 42 (1968) 2832.

    Google Scholar 

  7. J. Györe andM. Ecet, J. Thermal Anal., 2 (1970) 397.

    Google Scholar 

  8. R. Tsuchiya, A. Uehara andE. Kyuno, Bull. Chem. Soc. Japan, 44 (1971) 701.

    Google Scholar 

  9. P. M. Madhusudan et al., Thermochim. Acta, 9 (1974) 149.

    Article  Google Scholar 

  10. N. R. Chandhum andS. Mitra, Bull. Chem. Soc. Japan, 48 (1975) 2837.

    Google Scholar 

  11. J. Zsakó, Cs. Várhelyi andG. Liptay, Thermal Analysis Proc, Akadémiai Kiadó, Heyden and Son, Budapest, 1974, 1, p. 825.

    Google Scholar 

  12. N. Raychaudhuri, G. K. Pathak andS. Mitra, Thermal Analysis Proc, Akadémiai Kiadó, Heyden and Son, Budapest, 1974, 1, p. 615.

    Google Scholar 

  13. N. Niklewicz, J. Warczak andN. Hajduk, Thermal Analysis Proc, Akadémiai Kiadó, Heyden and Son, Budapest, 1974, 1, p. 487.

    Google Scholar 

  14. I. M. Criado andI. Morales, Thermochim. Acta, 16 (1976) 382.

    Article  Google Scholar 

  15. R. S. Kalyoncu, M. E. Tadros et al., J. Thermal Anal., 9 (1976) 233.

    Google Scholar 

  16. V. A. Logvinenko andL. I. Myachina, Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim. 9 (1974) 85.

    Google Scholar 

  17. F. Škvara, J. Šestak andV. Šestaková, Thermal Analysis Proc, Akadémiai Kiadó, Heyden and Son, Budapest, 1974, 1, p. 105.

    Google Scholar 

  18. V. Šatava andF. Skvara, J. Am. Ceram. Soc., 52 (1969) 11.

    Google Scholar 

  19. V. Šatava, Thermochim. Acta, 2 (1971) 423.

    Article  Google Scholar 

  20. A. V. Nikolaev, V. A. Logvinenko, Ya. Shestak andF. Shkvara, Dokl. Akad. Nauk SSSR, 231 (1976) 146.

    Google Scholar 

  21. V. A. Logvinenko, O. V. Gegola, G. N. Chekhova andYu. A. Dyadin, Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim., 9 (1977) 95.

    Google Scholar 

  22. V. A.Logvinenko, O. V.Gegola, G. N.Chekhova and Yu. A.Dyadin, Soveschanie po kinetike i mekhanizmu khimicheskikh reaktsy v tverdom tele (Conference on the kinetics and mechanism of chemical reactions in solids), Novosibirsk, 1977. Thesises of the lectures, Part 1, p. 150.

Download references

Author information

Authors and Affiliations

  1. Institute of Inorganic Chemistry, Sibirian Department of the Academy of Sciences of the USSR, Novosibirsk, USSR

    V. A. Logvinenko & L. I. Myachina

Authors
  1. V. A. Logvinenko
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. L. I. Myachina
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Logvinenko, V.A., Myachina, L.I. Effect of the dispersity of substances on the macrokinetics of thermal analysis under non-isothermal conditions. Journal of Thermal Analysis 16, 365–368 (1979). https://doi.org/10.1007/BF01910698

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01910698

Keywords

Search

Navigation