Journal
CHEMICAL ENGINEERING SCIENCE
Volume 65, Issue 11, Pages 3632-3637Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2010.03.011
Keywords
Forced periodic operation; Frequency response functions; Nonlinear dynamics; Chemical reactors; Adsorption; Mathematical modelling
Categories
Funding
- Serbian Ministry of Science [142014G]
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The concept of higher-order frequency response functions (FRFs), which is based on Volterra series representation of nonlineral systems, is used to analyse the time-average performance of a perfectly mixed reactor subject to periodic modulation of the inlet concentration, for a simple n-th order heterogeneous catalytic reaction. The second order frequency response function G(2)(omega, omega), which corresponds to the dominant term of the non-periodic (DC) component, essentially determines the average performance of the periodic process. Thus, in order to evaluate the potential of a periodic operation, it is sufficient to derive and analyse the G(2)(omega, omega) function. The sign of this function defines the sign of the DC component and reveals whether the periodic operation is favourable compared to conventional steady state operation, or not. It will be shown that, for the case investigated, the sign of this function depends both on the reaction order and on the shape of the adsorption isotherm. (C) 2010 Elsevier Ltd. All rights reserved.
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