# Impulse Response of Two and Three Continuous Stirred-Tank Reactors in Series: Exact and Approximate Solutions

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Consider two or three continuous stirred-tank reactors (CSTRs) in series. If the feed to the first reactor is an impulse tracer, then the outlet concentration from the last reactor is given in the Laplace domain by

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Contributed by: Housam Binous, Naim Faqir, Eid Al-Mutairi, and Brian G. Higgins (December 2011)

Open content licensed under CC BY-NC-SA

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Reference

[1] B. J. McCoy, "Approximate Polynomial Expansion Method for Inverting Laplace Transforms of Impulse Responses," *Chemical Engineering Communications*, 52(1–3), 1987 pp. 93–103.

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