MEDIATING OPERATION OF HETEROGENEOUS CSTR

A new type of periodic operation is investigated for a simple model of a heterogeneous catalytic continuous stirred tank reactor For the het erogeneous case, two scales of response times were derived slow for he at processes and fast for concentration processes. Periodic operation in intermediate mode between slow and fast processes is studied by man ipulation of the feed flow rate. The new approach is designated as med iating operation, which demonstrates ability to control interaction be tween fast and slow reactor subsystems due to desired separation of dy namic responses for temperature and concentration processes by a singl e input variable. The conversion improvement at lower temperature can be achieved for lower and upper stable steady states. For the system a nalysis, analytical investigation of the slow manifolds is used as wel l as numerical study.