[gkasparis]

i'm struggling to find info about how does this way to study kinetics works...i have a full diagram in front of me, which i can see the movable injector (so since its movable, does it help to find rate constant and rate orders?)
any help much appreciated

[fledarmus]

The basic principle in flow tube reactor kinetics is that the distance between the source and the detector is directly related to reaction time. What you are measuring is the relative concentrations of the reaction components after a specific time. By changing the length of travel, you can plot the reaction time against the appearance or disappearance of various components of the reaction mixture, and thereby determing their rate of change.

This describes it more fully:

http://web.mit.edu/10.652/www/CJHoward%20flow%20reactors.pdf