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dc.creatorNikačević, Nikola
dc.creatorTodić, Branislav
dc.creatorMandić, Miloš
dc.creatorPetkovska, Menka
dc.creatorBukur, Dragomir B.
dc.date.accessioned2021-03-10T14:19:50Z
dc.date.available2021-03-10T14:19:50Z
dc.date.issued2020
dc.identifier.issn0920-5861
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/4453
dc.description.abstractOne-dimensional pseudo-homogenous dynamic reactor model, incorporating detailed Fischer-Tropsch kinetics, was applied in a theoretical analysis of forced periodic operations. A milli-scale fixed-bed reactor was analyzed, using design and operation parameters, obtained previously in a steady-state optimization. Dynamic optimization and NLP methods were utilized to obtain optimal values of amplitude(s), frequency and phase shift(s) of sine-wave variation of inputs, around the corresponding optimal steady-state values, which maximize the productivity of C5+ hydrocarbons. Inlet variables that were modulated are: coolant temperature, reactants molar ratio, mass flow rate and pressure. In addition to the single input forcing, simultaneous modulations of multiple inputs were also considered, with combinations of the listed inlet variables. Among the single input cases, periodic variation of the coolant temperature resulted in the highest relative improvement of C5+, productivity by 30%. Multiple inputs forcing showed additional potential for improvement, resulting in relative c(5+) productivity increase of 52% for synchronized modulation of the coolant temperature, reactants molar ratio and mass flow rate. However, the increase in C5+ productivity is accompanied with relative increase in methane selectivity of 22-33% (relative to the steady-state value). The results suggest that, in the case of multiple input variations with high amplitudes, modulation of the inlet reactants molar ratio mainly contributes to the increase of CO conversion (e.g. reaction rate), the coolant temperature forcing slightly increases selectivity towards the desirable higher hydrocarbons (C5+), while the variation of the inlet mass flow rate enables better reaction temperature control and prevents a thermal runway.en
dc.publisherElsevier, Amsterdam
dc.relationQatar National Research Fund (a member of the Qatar Foundation) [NPRP 7-559-2-211]
dc.rightsrestrictedAccess
dc.sourceCatalysis Today
dc.subjectFischer-Tropsch synthesisen
dc.subjectFixed-bed reactorsen
dc.subjectForced periodic operationsen
dc.subjectProcess intensificationen
dc.subjectMilli-scale reactorsen
dc.subjectDynamic optimizationen
dc.titleOptimization of forced periodic operations in milli-scale fixed bed reactor for Fischer-Tropsch synthesisen
dc.typearticle
dc.rights.licenseARR
dc.citation.epage164
dc.citation.other343: 156-164
dc.citation.rankM21
dc.citation.spage156
dc.citation.volume343
dc.identifier.doi10.1016/j.cattod.2018.12.032
dc.identifier.scopus2-s2.0-85059103866
dc.identifier.wos000519970100017
dc.type.versionpublishedVersion


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Приказ основних података о документу