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dc.contributor.advisorMujtaba, Iqbal M.
dc.contributor.advisorEmtir, M.
dc.contributor.authorEdreder, E.A.*
dc.date.accessioned2010-05-11T15:22:51Z
dc.date.available2010-05-11T15:22:51Z
dc.date.issued2010-05-11T15:22:51Z
dc.identifier.urihttp://hdl.handle.net/10454/4296
dc.description.abstractBatch distillation with chemical reaction when takes place in the same unit is referred to as batch reactive distillation process. The combination reduces the capital and operating costs considerably. Among many different types of batch reactive distillation column configurations, (a) conventional (b) inverted (c) semi-batch columns are considered here. Three reaction schemes such as (a) esterification of methanol (b) esterification of ethanol (c) hydrolysis of methyl lactate are studied here. Four different types of dynamic optimisation problems such as (a) maximum conversion (b) maximum productivity (c) maximum profit and (d) minimum time are formulated in this work. Optimal design and or operation policies are obtained for all the reaction schemes. A detailed rigorous dynamic model consisting of mass, energy balances, chemical reaction and thermodynamic properties is considered for the process. The model was incorporated within the dynamic optimisation problems. Control Vector Parameterisation (CVP) technique was used to convert the dynamic optimisation problem into a nonlinear programming problem which was solved using efficient SQP (Successive Quadratic Programming) method available within the gPROMS (general PROcess Modelling System) software. It is observed that multi-reflux ratio or linear reflux operation always led to better performance in terms of conversion, productivity for all reaction schemes compared to that obtained using single reflux operation. Feed dilution (in the case of ethanol esterification) led to more profit even though productivity was found to be lower. This was due to reduction in feed price because of feed dilution. Semi-batch reactive distillation opertation (for ethanol esterification) led to better conversion compared to conventional batch distillation, however, the total amount of acetic acid (reactant) was greater in semi-batch operation. Optimisation of design and operation (for ethanol esterification) clearly showed that a single cloumn will not lead to profitable operation for all possible product demand profile. Also change in feed and /or product price may lead to adjust the production target to maximise the profitability. In batch distillation, total reflux operation is recommended or observed at the begining of the operation (as is the case for methnaol or ethanol esterification). However, in the case of hydrolysis, total reflux operation was obseved at the end of the operation. This was due to lactic acid (being the heaviest) was withrawn as the final bottom product.en
dc.description.sponsorshipLibyan Petroleum Instituteen
dc.language.isoenen
dc.rights© 2010 Edreder, E. A. This work is licensed under a Creative Commons Attribution-Non-Commercial-Share-Alike License (http://creativecommons.org/licenses/by-nc-nd/2.0/uk).en
dc.subjectConventional batch distillationen
dc.subjectInverted batch distillationen
dc.subjectBatch reactive distillationen
dc.subjectSemi-batch distillationen
dc.subjectFixed product demanden
dc.subjectDynamic modelling and optimisationen
dc.subjectEsterificationen
dc.subjectHydrolysisen
dc.subjectgPROMSen
dc.titleModelling and optimisation of batch distillation involving esterification and hydrolysis reaction systems. Modelling and optimisation of conventional and unconventional batch distillation process: Application to esterification of methanol and ethanol using acetic acid and hydrolysis of methyl lactate system.en
dc.type.qualificationleveldoctoralen
dc.publisher.institutionUniversity of Bradfordeng
dc.publisher.departmentSchool of Engineering, Design and Technologyen
dc.typeThesiseng
dc.type.qualificationnamePhDen
dc.date.awarded2010
refterms.dateFOA2018-07-18T23:43:50Z


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