Community Research and Development Information Service - CORDIS


The maintenance of safe operation conditions in chemical reactors is of paramount importance to avoid personal and installation damages, and environmental pollution. Despite conventional fall back mechanisms, switches and multi-layer control circuitry, there is always the possibility of undetected runaway events. Early warning devices are therefore indispensable, irrespective of the detailed mechanisms of the reaction and of other safety measures. In this work, an early warning device for detection of runaway initiation using phase space time-delay embedding reconstruction techniques is presented. A new off-line criterion based on the Lyapunov exponents, which are a typical measure of sensitivity in chaotic systems, is developed. This criterion is compared with the existing ones and it is experimentally verified. Starting from the Lyapunov exponents based, off-line criterion and borrowing Takens techniques from chaos theory, a new state space is reconstructed and an early warning criterion for runaway detection is developed.

Additional information

Authors: STROZZI F, JRC Ispra (IT);ZALDÍVAR J M, JRC Ispra (IT);WESTERTER P K R, Department of Chemical Engineering, Chemical Reaction Engineering Laboratories, Twente University of Technology, Enschede (NL)
Bibliographic Reference: EUR 17696 EN (1997) 112pp., FS, free of charge
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT), Fax: +39-332-785818
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