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Complex dynamical behavior in a new chemical oscillator: The chlorite–thiourea reaction in a CSTR

✍ Scribed by Mohamed Alamgir; Irving R. Epstein

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 414 KB
Volume: 17
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550170409

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✦ Synopsis

The reaction between chlorite ion and thiourea has been studied both in a closed (batch) system and in a flow reactor (CSTR). The principal stoichiometry is given by 2C10, + CS(NHi), + 2H20 = 2NH; + COz + 2C1-+ SO:

In batch, the reaction displays an induction period, whose length is proportional to [CS(NHJZ}/[C10,1 [H'], followed by the rapid buildup and disappearance of a CIOz intermediate. At [C10~]/[CS(NHz)2] ratios between 2.5 and 3.5, a second peak in the CIOz absorbance is observed. In the CSTR, this iodine-free system displays simple and complex periodic oscillation, bistability, aperiodic oscillation, and birhythmicity.

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