2018 Spring Meeting and 14th Global Congress on Process Safety
(53ab) Simultaneous Design and Control of an Inherently Safer Extractive Distillation Column
Authors
Congress on Process Safety April 22-25, 2019 Orlando, FL
Spotlights(T1F)
Safer Design - Oral Session
Safer Extractive Distillation Column
Su-Feher1,2, Bin Zhang1,2, Yogesh Koirala1,2,
Efstratios Pistikopoulos2,3, and M. Sam Mannan1,2
Kay OConnor Process Safety Center1
McFerrin Department of Chemical Engineering2
A&M Energy Institute3
A&M University
Station, Texas 77843-3122, USA
denis@tamu.edu
strategies in the early stage of design focus on reducing the overall hazard of
a process without considering its operability. The process is first designed to
be inherently safer with respect to a nominal, steady state case and then,
after the process is designed, layers of protection are added and operability
issues are addressed. However, the way a process is designed heavily impacts
its operability. An intensified process may contain less of a hazardous
substance and thus be inherently safer, but if the design restricts the
controllability of the process, then the design may pose a higher risk and the
process will be less safe overall. Therefore, in the early stage of design, it
is necessary to consider of both the inherent hazard contained within the
process and the ease by which these hazards can be controlled. With the dynamic behaviour of process systems
becoming increasingly complex, the consideration of operability issues in the
design stage becomes even more necessary to prevent incidents. Hence, a considerable amount of research has been
done to simultaneously optimize the design and control system of extractive distillation
columns, but no such approach has integrated inherent safety, only seeking to
produce an economically optimal design rather than a safe one CITATION Vas03 \l 1033 [1].
simultaneously design and control an inherently safer extractive distillation
column. The PARametric Optimization and Control (PAROC) framework is used as a
basis for the simultaneous design and control of an extractive distillation
columnCITATION Pro17 \l 1033 [2]. An
extensive literature review has identified inherent safety indices that can
compare the hazard level of different column designs CITATION FIK01 \l 1033 \m Fai04 \m Nan14 [3, 4, 5]. The inherent safety
index is incorporated into the PAROC framework, and the extractive distillation
column is simultaneously optimized for optimal control, design, and safety. The
integration of inherently safer design and control substantially reduces
operability issues that result from an uncontrollable process design and allows
for greater tolerance and ease of control.
Safe Design, Design/Green Engineering, Distillation,
Multi-parametric Programing
References
BIBLIOGRAPHY
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[1]
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V. Sakizlis, Design of Model Based Controllers via Parametric Programming, Department of Chemical Engineering and Chemical Technology, Imperial College, London, London, 2003.
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[2]
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N. A. Diangelakis, B. Burnak, J. Katz and a. E. N. Pistikopoulos, Process design and control optimization: A simultaneous approach by multi-parametric programming, AIChE Journal, vol. 00, no. 00, p. 20, 2017.
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[3]
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T. H. F. I. Khan and S. A. Abbasi, SAFETY WEIGHTED HAZARD INDEX (SWeHI) A New, User-friendly Tool for Swift yet Comprehensive Hazard Identi®cation and Safety Evaluation in Chemical Process Industries, Trans IChemE, vol. 79, pp. 65-80, 2001.
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F. I. Khan and P. R. Amyotte, Integrated Inherent Safety Index (I2SI): A Tool for Inherent Safety Evaluation, Process Safety Process, vol. 23, no. 2, pp. 136-148, 2004.
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[5]
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N. Medina-Herrera, I. E. Grossmann, M. S. Mannan and A. Jimenez-Gutierrez, An Approach for Solvent Selection in Extractive Distillation Systems Including Safety Considerations, Ind. Eng. Chem. Res., vol. 53, p. 12023−12031, 2014.
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