Matlab is suitable for recording signal for sensors and to analyze the data Matlab is very flexible and has lots of analysis functions and libraries.. If you want to control your reactors you should couple this to Labview or look for a toolbox. The followings links could be useful:
It is so easy. I did this project for two reactors in Matlab. If you decide to use traditional controlling strategy (TIC), you should solve all equations simultaneously, and using the error, set the manipulated variables. For modern controlling strategies such as predictive control, you can use Matlab toolbox.