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Titolo: OPTIMAL TIMEVARYING POTENTIAL CONTROL
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: 7,
volume: 23,
anno: 1993,
pagine: 715  727
 SICI:
 0021891X(1993)23:7<715:OTPC>2.0.ZU;21
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 ELECTROCHEMICAL REACTION SEQUENCES; NITROBENZENE; COLLOCATION;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 40
 Recensione:
 Indirizzi per estratti:



 Citazione:
 R. Bakshi e P.S. Fedkiw, "OPTIMAL TIMEVARYING POTENTIAL CONTROL", Journal of Applied Electrochemistry, 23(7), 1993, pp. 715727
Abstract
As an illustration of the potential utility of optimalcontrol theory, we determine the timevarying electrode potential which maximizes the desired product produced from a coupled, chemicalelectrochemical reaction sequence occurring in a wellmixed batch reactor for a specified reaction time. The reactant is electrochemically reduced to a stableintermediate which is itself a reactant for two competing parallel reactions: a homogeneous chemical decomposition to the desired product, or a further electrochemical reduction to an undesired product. If thetransfer coefficient of the first reaction is greater than that of the second, then chattering control, in which the potential switches at an infinite frequency between two limits, is optimal. If the transfer coefficients have the opposite relationship, then a continuous, timevarying potential is optimal. We compare the results of applying the optimal, chatteringpotential control with those resulting from the bestcontinuous and steady controls. Improved selectivity results from a chattering control and may be effected even in the presence of significant masstransfer resistance. Since an infinitefrequency control cannot be actually implemented, we discuss how a highfrequency, rectangular waveform can be determined which results in essentially the same product distribution as a chattering control. A qualitative, simpletoapply method to determine whether selectivity enhancement is attainableusing chattering controls is also illustrated.
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Documento generato il 15/07/20 alle ore 08:15:16