Megan Jobson | The University of Manchester (original) (raw)
Address: Manchester, England, United Kingdom
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Papers by Megan Jobson
Sustainable Production and Consumption, 2016
Chemical Engineering Research and Design, 2003
Asean Journal of Chemical Engineering, Jun 8, 2012
Chemical Engineering Science, 2005
It is well known that reactive distillation offers benefits by integrating distillation and react... more It is well known that reactive distillation offers benefits by integrating distillation and reaction within a single unit. While there are procedures available for the synthesis of non-reactive distillation processes and of reaction-separation systems, the design of reactive distillation columns is still a challenge. This work presents a new synthesis and design methodology for hybrid reactive distillation columns, featuring both
Asean Journal of Chemical Engineering, Sep 25, 2013
Applied Thermal Engineering, 2016
Computer Aided Chemical Engineering, 2001
BNFL have developed a single cycle flowsheet using hydroxamic acids to control the behaviour of n... more BNFL have developed a single cycle flowsheet using hydroxamic acids to control the behaviour of neptunium and centrifugal contactors to carry out the solvent extraction steps. The performance of such a flowsheet will be limited by the distribution behaviour of neptunium in the presence of hydroxamic acids and the mass transfer efficiency of the centrifugal contactors. These topics have been investigated in an extensive research programme.
In this work, a methodology has been developed for the automated design and synthesis of heat exc... more In this work, a methodology has been developed for the automated design and synthesis of heat exchanger networks (HENs) when the thermal properties of streams vary significantly with temperature. Rodriguez (2005) developed an optimisation approach to the design of complex HENs. In the approach, Simulated Annealing (SA) was employed as the optimisation algorithm. Both structural options, such as re-piping, re-sequencing of existing exchangers, and continuous options, such as stream- split fractions and exchanger duties, were considered without simplification of cost models. However, the thermal properties (i.e. heat capacity) of streams were assumed constant to maintain a linear problem representation. This assumption will introduce errors when applying the method to streams with a large temperature range, when the thermal properties are not constant, such as in crude oil refining. The shortcomings are overcome in this work by representing streams using multiple segments, each with c...
The Chemical Engineering Journal and the Biochemical Engineering Journal, 1995
Industrial & Engineering Chemistry Research, 2015
ABSTRACT
Chemical Engineering Research and Design, 2015
ABSTRACT
Chemical Engineering Research and Design, 2015
Computer Aided Chemical Engineering, 2012
Computer Aided Chemical Engineering, 2014
Computer Aided Chemical Engineering, 2005
Energy, 2014
ABSTRACT The importance of exploiting degrees of freedom within a crude oil distillation process ... more ABSTRACT The importance of exploiting degrees of freedom within a crude oil distillation process for improving energy performance has been a feature of process integration from the earliest days. Combining process changes with changes to the heat recovery system leads to far better results, compared with changes to the heat recovery system alone. However, in order to obtain the best results, the distillation process and heat exchanger network need to be optimised simultaneously. Whilst in principle this is straightforward, there are many difficulties. Methods for the optimisation of heat exchanger networks are well developed. In these methods, heat exchanger network models are based on network details, such as stream connections between heat exchangers, heat transfer area of individual units, etc. The consideration of these network details is important to design and optimise crude oil distillation systems. On the other hand, the distillation process model to be coupled with the heat exchanger network model needs to be simple and robust enough to be included in an optimisation framework. If distillation models and heat recovery models can be combined effectively, then there are not just opportunities for design and retrofit, but also for operational optimisation. One of the big challenges to progress the application of this approach is the effective generation of reduced distillation models. Short-cut distillation models can be used, but many other options are available, such as the use of artificial neural networks. This paper reviews various crude oil distillation modelling approaches and highlights the areas of application of these different approaches. An example illustrates the computational performance of reduced and rigorous crude oil distillation models.
Sustainable Production and Consumption, 2016
Chemical Engineering Research and Design, 2003
Asean Journal of Chemical Engineering, Jun 8, 2012
Chemical Engineering Science, 2005
It is well known that reactive distillation offers benefits by integrating distillation and react... more It is well known that reactive distillation offers benefits by integrating distillation and reaction within a single unit. While there are procedures available for the synthesis of non-reactive distillation processes and of reaction-separation systems, the design of reactive distillation columns is still a challenge. This work presents a new synthesis and design methodology for hybrid reactive distillation columns, featuring both
Asean Journal of Chemical Engineering, Sep 25, 2013
Applied Thermal Engineering, 2016
Computer Aided Chemical Engineering, 2001
BNFL have developed a single cycle flowsheet using hydroxamic acids to control the behaviour of n... more BNFL have developed a single cycle flowsheet using hydroxamic acids to control the behaviour of neptunium and centrifugal contactors to carry out the solvent extraction steps. The performance of such a flowsheet will be limited by the distribution behaviour of neptunium in the presence of hydroxamic acids and the mass transfer efficiency of the centrifugal contactors. These topics have been investigated in an extensive research programme.
In this work, a methodology has been developed for the automated design and synthesis of heat exc... more In this work, a methodology has been developed for the automated design and synthesis of heat exchanger networks (HENs) when the thermal properties of streams vary significantly with temperature. Rodriguez (2005) developed an optimisation approach to the design of complex HENs. In the approach, Simulated Annealing (SA) was employed as the optimisation algorithm. Both structural options, such as re-piping, re-sequencing of existing exchangers, and continuous options, such as stream- split fractions and exchanger duties, were considered without simplification of cost models. However, the thermal properties (i.e. heat capacity) of streams were assumed constant to maintain a linear problem representation. This assumption will introduce errors when applying the method to streams with a large temperature range, when the thermal properties are not constant, such as in crude oil refining. The shortcomings are overcome in this work by representing streams using multiple segments, each with c...
The Chemical Engineering Journal and the Biochemical Engineering Journal, 1995
Industrial & Engineering Chemistry Research, 2015
ABSTRACT
Chemical Engineering Research and Design, 2015
ABSTRACT
Chemical Engineering Research and Design, 2015
Computer Aided Chemical Engineering, 2012
Computer Aided Chemical Engineering, 2014
Computer Aided Chemical Engineering, 2005
Energy, 2014
ABSTRACT The importance of exploiting degrees of freedom within a crude oil distillation process ... more ABSTRACT The importance of exploiting degrees of freedom within a crude oil distillation process for improving energy performance has been a feature of process integration from the earliest days. Combining process changes with changes to the heat recovery system leads to far better results, compared with changes to the heat recovery system alone. However, in order to obtain the best results, the distillation process and heat exchanger network need to be optimised simultaneously. Whilst in principle this is straightforward, there are many difficulties. Methods for the optimisation of heat exchanger networks are well developed. In these methods, heat exchanger network models are based on network details, such as stream connections between heat exchangers, heat transfer area of individual units, etc. The consideration of these network details is important to design and optimise crude oil distillation systems. On the other hand, the distillation process model to be coupled with the heat exchanger network model needs to be simple and robust enough to be included in an optimisation framework. If distillation models and heat recovery models can be combined effectively, then there are not just opportunities for design and retrofit, but also for operational optimisation. One of the big challenges to progress the application of this approach is the effective generation of reduced distillation models. Short-cut distillation models can be used, but many other options are available, such as the use of artificial neural networks. This paper reviews various crude oil distillation modelling approaches and highlights the areas of application of these different approaches. An example illustrates the computational performance of reduced and rigorous crude oil distillation models.