The kinetic study on the photochemical addition reaction of hydrogen bromide to chlorotrifluoroethylene was performed in the presence of ultra-violet light.
To make the light intensity constant at any point of the reactor, helix-type reactor was adopted.
When the ratio of the feed rate of hydrogen bromide to the feed rate of chlorotrifluoroethylene was 2:1, the reaction rate equation could be written as,
$r_p=k\sqrt{I_1}[CF_2=CFCI]$
and at reaction temperature of 63 ℃, k was found to have the value of $1.134 ×10^3$ (I/gr-mole).
When the feed ratio was reversed, adequate rate equation was not found.
When equimolar mixture of the reactants was fed, the reaction rate equation was found to be
$r_p=2.25+\sqrt{5.06+2.03x10^{16} exp (-1.05x10^6/RT)[HBr][CF_2=CF01]}$.
As the reaction proceeded, the inner wall of the reactor was contaminated by the by-products, and the light energy could not be used effectively.
