  It is possible that self-induced oscillations appear in reactors, and that
their range does not reach the steady state, although such state exists. To
prove this, a cascade of tank reactors coupled with mass recycle loop was
tested numerically. The above-mentioned phenomenon is characterized by the
location of the steady point out of the limit cycle in the phase portrait. This
incident may be beneficial to the process, as low steady state does not have to
exclude an independent increase of the conversion degree, despite being the
only state and not generating oscillations.
