Skip to main content
SpringerLink
Log in

Comparison of thermokinetic data obtained by isothermal, isoperibolic, adiabatic and temperature programmed measurements

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

Abstract

In this paper isothermal, isoperibolic and adiabatic calorimeters and a Power-Compensating DSC are compared by determining kinetic data of a simple test reaction. First, the kinetic parameters were analyzed using a conventional isothermal method, based on the analytic determination of the course of reaction. Subsequently, the kinetic data of the performed reaction were determined for the different types of calorimeters by simultaneously evaluating several measurements with identical initial conditions but different temperature courses. The kinetic parameters obtained by the different calorimeters agree reasonable well, indicating the reliability of kinetic data derived from thermokinetic methods.

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

Abbreviations

A/m2:

heat exchange area

CA0/mol l−1:

initial concentration of compoundA

CPIC,0/mol l−1:

initial concentration of phenyl isocyanate

CBuOH,0/mol l−1:

initial concentration of 2-butanol

E/J mol−1:

activation energy

h/s:

isothermal equivalent reaction time

ΔH/J mol−1 :

heat of reaction, reaction enthalpy

k/l mol−1 s−1:

reaction rate constant (units corresponding to a second order reaction)

λ:

ratio of initial concentrations λ=C PIC,0/C BuOH,0

n :

reaction order of phenyl isocyanate and 2-butanol

npic,0/mol:

initial amount of phenyl isocyanate

νA :

stoichiometric coefficient of compoundA

mcp/J K−1:

heat capacity of the whole system (reaction mixture and reactor)

Φ(X):

conversion dependent term of reaction rate

Q/W:

heat power caused by the chemical reaction

Qch/W:

heat power of the chemical reaction

Qbas/W:

baseline (heat power of the

r(X,T)/mol 1−1 s−1:

reaction rate

r(0,TR)/mol l−1 s−1:

initial reaction rate at a reference temperatureT r

τ/s:

time lag constant

t/s:

reaction time

T/K:

temperature of reaction mixture

T0/K:

initial temperature

Te/K:

final temperature

TK/K:

cooling temperature

ΔT max/K:

maximum temperature rise under adiabatic conditions

U/W K−1 m−2:

heat transfer coefficient

X :

conversion

References

  1. W. Köhler, O. Riedel and H. Scherer, Chem. Ing Tech., 44 (1972) 1216.

    Article  Google Scholar 

  2. G. Höhne, W. Hemminger and H.-J. Flammersheim, “Differential Scanning Calorimetry”, Springer-Verlag Berlin Heidelberg 1996.

    Google Scholar 

  3. T. Grewer, “Thermal hazards of chemical reactions”, Elsevier Amsterdam 1994.

    Google Scholar 

  4. S. Wagner, Dissertation, Technische Universität Berlin 1996.

  5. A. M. Angelidou and P. Hugo, Chem. Ing. Tech., 62 (1990) 741.

    Article  CAS  Google Scholar 

  6. P. Hugo and G. H. Pham, Chem. Ing. Tech., 61 (1989) 635.

    Article  CAS  Google Scholar 

  7. H. J. Borchards and F. Daniels, J. Am. Chem. Soc., 79 (1957) 41.

    Article  Google Scholar 

  8. E. S. Freeman and B. Carrol, J. Phys. Chem., 62 (1958) 394.

    Article  CAS  Google Scholar 

  9. J. Opfermann and E. Kaiserberger, Thermochim. Acta, 203 (1992) 167.

    Article  CAS  Google Scholar 

  10. P. Hugo, Chem. Ing. Tech., 65 (1993) 1497.

    Article  CAS  Google Scholar 

  11. J. Mentel and H. Anderson, Thermochim. Acta, 187 (1991) 121.

    Article  CAS  Google Scholar 

  12. A. I. Benin, A. A. Kossoy and P. U. Smykalov, J. Thermal Anal., 38 (1992) 1151.

    Article  CAS  Google Scholar 

  13. P. Hugo, J. Leonhardt and S. Wagner, Z. Naturforschung, 50a (1995) 549.

    Google Scholar 

  14. P. Hugo, J. Leonhardt and S. Wagner, “Sichere Handhabung chemischer Reaktionen”, Praxis der Sicherheitstechnik Vol. 3, Dechema Frankfurt am Main 1995, 79.

Download references

Author information

Authors and Affiliations

  1. Institute of Technical Chemistry from the Technical University of Berlin, Strasse des 17. Juni 135, D-10623, Berlin, Germany

    J. Leonhardt & P. Hugo

Authors
  1. J. Leonhardt
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. P. Hugo
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

The authors are thankful for the financial support by the Department of Education and Research of the Federal Republic of Germany (BMBF).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Leonhardt, J., Hugo, P. Comparison of thermokinetic data obtained by isothermal, isoperibolic, adiabatic and temperature programmed measurements. Journal of Thermal Analysis 49, 1535–1551 (1997). https://doi.org/10.1007/BF01983714

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01983714

Keywords

Search

Navigation