Simultaneous design of separation sequences and whole process energy integration
File(s)
Accepted version
Author(s)
Leeson, D
Fennell, P
Mac Dowell, N
Shah, N
Type
Journal Article
Abstract
This paper presents a novel methodology for the optimisation of the preliminary design of heat-integrated multicomponent distillation sequences. This is achieved through use of a reduced process superstructure where the role of splitting each adjacent key component pair is assigned to an individual separation column, greatly reducing the size and complexity of the problem. This methodology uses information about other process streams on site with which heat can be exchanged within the initial design in order to find a plant-wide optimal separation configuration with the aim of reducing the cost of heating provided by utilities including those used for heating and cooling process streams. In order that this model can be formulated as a mixed-integer linear program, this model utilises a discretised temperature grid where stream temperatures are allowed to vary. This methodology was tested on an example of a mixed alkane feed stream, with the sequence changing dependent on the degree of process integration. The method was found to have the potential for significant cost reductions compared to a heuristic design, with the example exhibiting a cost saving of over 50% and a reduction in CO2 associated with process heating of almost 60%, though the magnitude of these savings is highly dependent on the specific example to which it is applied.
Date Issued
2017-07-15
Date Acceptance
2017-07-06
Citation
CHEMICAL ENGINEERING RESEARCH & DESIGN, 2017, 125, pp.166-180
ISSN
0263-8762
Publisher
Institution of Chemical Engineers
Start Page
166
End Page
180
Journal / Book Title
CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume
125
Copyright Statement
© 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000411846800016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Engineering, Chemical
Engineering
Separation process design
Energy integration
Multicomponent distillation
Preliminary design
Optimisation
COUPLED DISTILLATION SEQUENCES
SUPERSTRUCTURE OPTIMIZATION
SCHEMES
SYSTEM
0904 Chemical Engineering
Chemical Engineering
Strategic, Defence & Security Studies
Publication Status
Published