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Glossary

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Thermal reaction number B

The Thermal reaction number B provides a direct measure of the hazard potential related to a process. It combines thermodynamics and reaction kinetics by being directly proportional to the temperature dependence of the reaction rate represented by the activation temperature E/R and the adiabatic temperature increase ΔTad.

B=E/R ? ΔTad/ T2

Reactions with a small to moderate hazard potential are characterized by thermal reaction number values around 2, and processes with an extremely high potential have values up to 50 and more.

Reference:

  •  J. Steinbach, Safety Assessment for Chemical Processes, 1999
 

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