deactivation energy

English

Noun

deactivation energy (plural deactivation energies)

1. (physical chemistry) The amount of energy needed to slow down or stop a reaction.
   • 1971, Geomagnetism and Aeronomy - Volume 11, page 427:

     If we disregard the deactivation energy, which can be done, except, perhaps, for the lowest vibrational levels, then, according to Bates' theoretical computations, the atom-exchange rate constant must be large, ~10^-10 cm³sec^-1.

   • 2004, Icelandic Agricultural Sciences - Volumes 16-20, page 46:

     Activation energy is a measure of the minimum energy needed by the photosynthesis system to react and deactivation energy is the maximum energy the system can cope with before the reaction decreases (Brady 1990).

   • 2012, John Butt, Activation, Deactivation, and Poisoning of Catalysts, page 372:

     However, in the first case (deactivation energy << main reaction energy) there appears to be a uniform variation of activity throughout the bed.

   • 2016, Jorge Ancheyta, Deactivation of Heavy Oil Hydroprocessing Catalysts, page 267:

     The highest deactivation energy was obtained for hydrodenitrogenation of the nonbasic nitrogen (33.8 kcal/mol), while the deactivation energies for the other reactions were in the range of 20–27 kcal/mol.