“…However, merely values between 1 and 30, or up to 100 in a few exceptional cases, are achieved in practice, depending on the working principle of the experimental reactor and the reaction conditions. To classify the differential circulation reactor with an internal circuit within or among the borderline cases of the ideal intermixed stirrer vessel and the ideal tube reactor (c = 0), the circulation ratio is often determined by means of differential pressure measurement [2] or anemometry [3,4].…”