A network of connected catalyticreactorswithperiodicallyswitchedinletandoutletsectionsis numericallystudiedforreversibleexothermicreactions.Themethanolsynthesisisselectedas representativeprocessexampleandtwodifferentswitchstrategiesarecomparedwiththeobjectiveof overcomingtheconversionlimitsimposedbythermodynamicequilibrium.Thefirststrategy,whichis the mostconsideredinliterature,consistsofperiodicallyswitchingthefeedtothesecondreactorofthe currentreactorsequencewhilethesecondstrategyisimplementedbyperiodicallyswitchingthefeed to thelastreactorofthecurrentsequence.Periodicregimescorrespondingtosinglesquare-like temperaturewavestravellingoverthecatalyticbedandcharacterizedbycomparablemethanol conversionvaluesaredetectedforboththeconsideredstrategies.Theseregimesexhibit,however,a significantlylargerdomainofexistenceforthesecondstrategy.Moreover,thesecondstrategygivesrise to otherperiodicregimescorrespondingtospatiotemporaltemperaturepatternscharacterizedby differentspatialandtemporalperiodicity.Thesepatternsariseintheformoftemperaturewavetrains and ensuremethanolconversionvaluessignificantlylargerthanthosefoundunderperiodicregimes characterizedbysingletemperaturewaves.
Temperature and conversion patterns in a network of catalytic reactors for methanol synthesis with different switch strategies
Russo L
2010
Abstract
A network of connected catalyticreactorswithperiodicallyswitchedinletandoutletsectionsis numericallystudiedforreversibleexothermicreactions.Themethanolsynthesisisselectedas representativeprocessexampleandtwodifferentswitchstrategiesarecomparedwiththeobjectiveof overcomingtheconversionlimitsimposedbythermodynamicequilibrium.Thefirststrategy,whichis the mostconsideredinliterature,consistsofperiodicallyswitchingthefeedtothesecondreactorofthe currentreactorsequencewhilethesecondstrategyisimplementedbyperiodicallyswitchingthefeed to thelastreactorofthecurrentsequence.Periodicregimescorrespondingtosinglesquare-like temperaturewavestravellingoverthecatalyticbedandcharacterizedbycomparablemethanol conversionvaluesaredetectedforboththeconsideredstrategies.Theseregimesexhibit,however,a significantlylargerdomainofexistenceforthesecondstrategy.Moreover,thesecondstrategygivesrise to otherperiodicregimescorrespondingtospatiotemporaltemperaturepatternscharacterizedby differentspatialandtemporalperiodicity.Thesepatternsariseintheformoftemperaturewavetrains and ensuremethanolconversionvaluessignificantlylargerthanthosefoundunderperiodicregimes characterizedbysingletemperaturewaves.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
