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  Nonlinear frequency response analysis of forced periodic operation of non-isothermal CSTR with simultaneous modulation of inlet concentration and inlet temperature

Nikolic, D., Seidel-Morgenstern, A., & Petkovska, M. (2015). Nonlinear frequency response analysis of forced periodic operation of non-isothermal CSTR with simultaneous modulation of inlet concentration and inlet temperature. Chemical Engineering Science, 137, 40-58. doi:10.1016/j.ces.2015.06.018.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-BABA-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-E52D-7
Genre: Journal Article

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 Creators:
Nikolic, Daliborka1, Author
Seidel-Morgenstern, Andreas2, 3, Author              
Petkovska, Menka4, Author
Affiliations:
1UniversityofBelgrade/InstituteforChemistry,TechnologyandMetallurgy,Njegoševa 12,11000Belgrade,Serbia, ou_persistent22              
2Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738150              
3Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              
4University of Belgrade/Faculty of Technology and Metallurgy, Department of Chemical Engineering, Karnegijeva 4, 11120 Belgrade, Serbia, ou_persistent22              

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Free keywords: Nonlinear dynamics; Mathematical modeling; Chemical reactors; Simulation; Non-isothermal CSTR; Two-input modulation
 Abstract: The nonlinear frequency response (NFR) method is applied for evaluation of possible improvement through simultaneous periodic modulation of two inputs of a non-isothermal continuously stirred tank reactor (CSTR) in which homogeneous nth order reaction A→product(s) takes place. The two modulated inputs are the concentration of the reactant in the feed steam and the temperature of the feed stream. The cross asymmetrical second order FRF which correlates the outlet concentration with both modulated inputs is derived and analyzed. The optimal phase difference which should be used in order to maximize the conversion is determined. The method is tested on three numerical examples of non-isothermal CSTRs: (a) one which is oscillatory stable with strong resonant behavior, (b) one which is oscillatory stable with weak resonant behavior and (c) one which is nonoscillatory stable. Good agreement between the results of the approximate NFR method and the results of “exact” numerical integration is obtained except for the reactor with strong resonance for forcing frequencies which are close to the resonant frequency and for the reactor with weak resonant behavior for forcing frequency equal to the resonant one in case of high forcing amplitudes.

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Language(s): eng - English
 Dates: 2015
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.ces.2015.06.018
 Degree: -

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Title: Chemical Engineering Science
Source Genre: Journal
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Pages: - Volume / Issue: 137 Sequence Number: - Start / End Page: 40 - 58 Identifier: ISSN: 0009-2509