We study the stabilisation of travelling temperature wave trains in periodically forced networks of catalytic reactors where methanol synthesis takes place. Temperature wave train solutions reproduce the inter-stage cooling effect of multistage fixed bed reactors and are therefore particularly attractive in terms of methanol conversion. However, these solutions are generally stable within narrow operating windows and always coexist with solutions characterised by lower methanol conversion. We implement a feedback control strategy with the switching time as a manipulated variable to ensure the stability of temperature wave trains. The reaction front velocity is estimated during each cycle based on temperature measurements. This allows the switching time to be computed so that the reaction front does not cross a prescribed set-point position. Indications on how to place temperature sensors and to select the set-point and controller parameters are provided. Numerical simulations demonstrating the ability of the implemented control law to prevent the transition to undesired solutions in the presence of disturbances both in the operating regime and during start-up are reported. © 2012 Elsevier B.V.

Control of temperature wave trains in periodically forced networks of catalytic reactors for methanol synthesis / Altimari, Pietro; E., Mancusi. - In: CHEMICAL ENGINEERING AND PROCESSING. - ISSN 0255-2701. - STAMPA. - 63:(2013), pp. 25-36. [10.1016/j.cep.2012.10.008]

Control of temperature wave trains in periodically forced networks of catalytic reactors for methanol synthesis

ALTIMARI, PIETRO;
2013

Abstract

We study the stabilisation of travelling temperature wave trains in periodically forced networks of catalytic reactors where methanol synthesis takes place. Temperature wave train solutions reproduce the inter-stage cooling effect of multistage fixed bed reactors and are therefore particularly attractive in terms of methanol conversion. However, these solutions are generally stable within narrow operating windows and always coexist with solutions characterised by lower methanol conversion. We implement a feedback control strategy with the switching time as a manipulated variable to ensure the stability of temperature wave trains. The reaction front velocity is estimated during each cycle based on temperature measurements. This allows the switching time to be computed so that the reaction front does not cross a prescribed set-point position. Indications on how to place temperature sensors and to select the set-point and controller parameters are provided. Numerical simulations demonstrating the ability of the implemented control law to prevent the transition to undesired solutions in the presence of disturbances both in the operating regime and during start-up are reported. © 2012 Elsevier B.V.
Linear piecewise feedback control; Loop reactor; Patterns control; Periodically forced network; Process intensification; Train waves
01 Pubblicazione su rivista::01a Articolo in rivista
Control of temperature wave trains in periodically forced networks of catalytic reactors for methanol synthesis / Altimari, Pietro; E., Mancusi. - In: CHEMICAL ENGINEERING AND PROCESSING. - ISSN 0255-2701. - STAMPA. - 63:(2013), pp. 25-36. [10.1016/j.cep.2012.10.008]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/508176
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 8
social impact