Naslov
Soft Sensor development for the Estimation of Benzene Content in Catalytic Reformate

Autori
Ujević Andrijić, Željka ; Rolich, Tomislav ; Bolf, Nenad

Izvornik
Industrial & engineering chemistry research (0888-5885) 51 (2012), 7; 3007-3014

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
soft sensor; system identification; fractionation of reformate; optimization; genetic algorithms; pattern search; benzene content

Sažetak
As vehicle emission standards become more stringent, there is an increasing need for continual monitoring of benzene content in gasoline. Since on-line analyzers are often unavailable, and laboratory analyses are infrequently obtained, soft sensors for the estimation of benzene content of light reformate are developed. Soft sensors are developed using linear and nonlinear identification methods. Experimental data are acquired from the refinery distributed control system (DCS) and include continuously measured variables and analyzer assays available on-line. In the present work, the development of a finite impulse response (FIR) model, an output error (OE) model, and a Hammerstein-Wiener (HW) model is presented. To overcome the problem of selecting the best model parameters by trial and error, genetic algorithms and pattern (direct) search were used. On the basis of developed soft sensors, it is possible to entirely replace on-line analyzers with soft sensors by embedding the model in a DCS on-site.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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