Kooij equation

In tables of rate constants, compiled for the purposes of combustion, atmospheric and astrochemical modelling, the recommended rate constants are often expressed using the following form of the Kooij equation ... 

This equation and slight variants of it are frequently referred to as the modified Arrhenius equation and sometimes as the Kooij equation, and are often used to express the temperature dependence of the rate coefficients in kinetic databases compiled for use in modelling atmospheric, combustion and astrochemical environments. For example, in KIDA (a Kinetic Database for Astrochemistry [29]), rate coefficients and their temperature dependences are expressed by the equation ... 

An explanation for the transition of the dissolution reaction from valence 4 to valence 2 with increasing light intensity was given in a model proposed by Kooij and Vamnaekelbergh. They assume the presence of an intermediate Si(l), which is an electron-deficient surface silicon atom and has a catalytic effect on the hydrogen reduction reaction. The essential steps in the reaction scheme are described by the following equations ... 

In general reaction rates increase with increasing temperature. Kooij and van t Hoff (1893) proposed an equation for the temperature dependence of reaction rates... 

The modified form of the Arrhenius equation given in eqn (1.3) was apparently first suggested by Kooij, a student of van t HofFs. If that equation is operated on according to eqn (1.8), one obtains the following expression for the activation energy ... 

Closer inspection of this equation reveals that although it resembles an Arrhenius equation for the temperature dependence of the rate constant, such dependence is more comphcated giving an expression developed by D.M. Kooij, a student ofJ.H. van Hoff, in 1893. 

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