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Titolo: OPTIMAL TIMEVARYING CELLVOLTAGE CONTROL OF A PARALLELPLATE REACTOR
Autore: BAKSHI R; FEDKIW PS;
 Indirizzi:
 N CAROLINA STATE UNIV,DEPT CHEM ENGN RALEIGH NC 27695 N CAROLINA STATE UNIV,DEPT CHEM ENGN RALEIGH NC 27695
 Titolo Testata:
 Journal of Applied Electrochemistry
fascicolo: 11,
volume: 24,
anno: 1994,
pagine: 1116  1123
 SICI:
 0021891X(1994)24:11<1116:OTCCOA>2.0.ZU;2X
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 POTENTIAL CONTROL; NITROBENZENE; REDUCTION;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 12
 Recensione:
 Indirizzi per estratti:



 Citazione:
 R. Bakshi e P.S. Fedkiw, "OPTIMAL TIMEVARYING CELLVOLTAGE CONTROL OF A PARALLELPLATE REACTOR", Journal of Applied Electrochemistry, 24(11), 1994, pp. 11161123
Abstract
As a means to illustrate the calculation of an optimal cellvoltage control for a parallelplate reactor, we determine the timevarying cell voltage that maximizes paminophenol produced from the electroreduction of nitrobenzene in a differentialconversion reactor operated in abatch mode; that is, the electrolyte is continuously recirculated from a batch holding tank through the reactor in which a low conversion per pass occurs. A rationale is given for restricting the search for the optimal control for this particular reaction network to a chatteringcell voltage that switches between a priori chosen minimum and maximum values. The optimal, timevarying duty cycle is computed using a gradientsearch technique. The predicted concentrations are dependent upon the reaction time; for the conditions examined here, an improvement of twentyfive percent in the production and ninehundred percent in the selectivity of paminophenol may be achieved by using the optimal, timevarying voltage in comparison to the best steady value. Since a chattering control is a mathematical construct, we illustrate that a rectangular, highfrequency waveform may be applied to yield results which are indistinguishable from those effected by a chattering cell voltage. The period of the waveform must be short enough so that surface concentrations are time invariant over it and yet, simultaneously, mustbe long enough so that doublelayer charging does not account for a significant passage of coulombs.
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Documento generato il 13/07/20 alle ore 18:09:35