Babi, Deenesh Kavi

Gani, Rafiqul

Lutze, Philip

Woodley, John

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 19, 2017Achieving Process Intensification: A Phenomena-Based Synthesis/DesignMethodologyLutze, Philip; Babi, Deenesh Kavi; Woodley, John; Gani, RafiqulPublication date:2011Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Lutze, P., Babi, D. K., Woodley, J., & Gani, R. (2011). Achieving Process Intensification: A Phenomena-BasedSynthesis/Design Methodology. Abstract from 2011 AIChE Annual Meeting, Minneapolis, MN, United States.Abstract: Achieving Process Intensification: A Phenomena-Based Synthesis/Design Methodology (2011 Annual Meeting)http://aiche.confex.com/aiche/2011/webprogram/Paper220275.html[28-10-2011 15:44:24]Start | Grid View | Browse by Day OR Group/Topical | Author Index | Keyword Index | Personal SchedulerAchieving Process Intensification: A Phenomena-Based Synthesis/DesignMethodologyThursday, October 20, 2011: 9:00 AMMarquette V (Hilton Minneapolis)Philip Lutze, Deenesh K. Babi, John M. Woodley and Rafiqul Gani, Department of Chemical and Biochemical Engineering,Denmark Technical University, Lyngby, DenmarkIn recent years, Process Intensification (PI) has attracted considerable interest as a potential means of process improvements andto meet the increasing demands for sustainable production [1]. PI seeks to improve processes by increasing efficiency, reducingenergy consumption, operational costs, volume and waste as well as simplifying the flowsheet.  Thus, a variety of intensifiedoperations and equipment have been developed by academia and industry but, to date, only a limited number of intensifiedtechnologies have achieved implementation, such as reactive distillation, dividing wall columns and reverse flow reactors [2]. Onemajor reason for this is that the identification of the best PI option with the currently used techniques is neither simple norsystematic.In previous work [3] we reported the development of a general computer-aided systematic synthesis/ design methodology. In orderto manage the complexity of the potentially large number of intensified options, the optimization problem is solved by adecomposition approach. In this methodology, redundant intensified options were systematically removed by checking againstpredefined constraints.  However, at present, this methodology is limited to already pre-defined PI unit operations which can beretrieved, together with all the necessary information for synthesis and design of each, from a knowledge base tool. In order toinvent new unit operations and based on them, new process designs and flowsheets, it is necessary to investigate PI options atthe phenomenological level [4, 5], which is the topic of this contribution. The basis of the phenomena-based process synthesis isphenomena building blocks consisting of mass, component, energy and momentum balances as well as connectivity rulesbetween the phenomena building blocks. Two different connections between phenomena exist: A connection implying thesimultaneous occurrence of phenomena or a connection implying the sequential occurrence of phenomena which depends on theoperational window of the phenomena involved. Based on this approach, a general methodology has been developed forphenomena-based synthesis/design, similar to the one for pre-defined PI unit operations [3]. First, the process design problem isdefined, in terms of a set of product qualities and quantities as well as additional process constraints and the desired (target)process improvement. Next, this information is analyzed to identify all potential phenomena building blocks and theircorresponding operational windows. Based on this, the phenomena building blocks are joined together according to connectivityrules to match the defined process intensification targets and a superstructure of flowsheet options is generated. In the followingstep, the generated options are screened in terms of additional logical and structural constraints as well as performancespecifications before unit operations are identified. For example, a sequence of at least three simultaneous ideal mixing andreaction phenomena can be identified as a plug flow reactor. In the penultimate step, a reduced optimization (NLP) problem issolved to identify the best intensified flowsheet. The advantage of the phenomena-based process synthesis and design is that itgenerates potentially novel process options because the initial search space is wider and allows space beyond those involvingexisting unit operations and is truly predictive. Also, the method provides simultaneous development of the necessary processmodels.In this contribution the application of the phenomena-based process synthesis/design methodology implemented within acomputer-aided framework will be presented together with a selected example of industrial importance.[1]          Becht, B., Franke, R., Geißelmann, A., Hahn, H. An industrial view of process intensification Chem Eng Process 2009; 48,1, 329–332.[2]          Harmsen, J. Process Intensification in the petrochemicals industry: Drivers and hurdles for commercial implementation.Chem Eng Process 2010; 49, 1, 70-73.[3]          Lutze, P., Gani, R., Woodley, J.M. Process Intensification: A perspective on process synthesis. Chem Eng Process 2010;Abstract: Achieving Process Intensification: A Phenomena-Based Synthesis/Design Methodology (2011 Annual Meeting)http://aiche.confex.com/aiche/2011/webprogram/Paper220275.html[28-10-2011 15:44:24]49, 6, 547-558.[4]          Freund, H., Sundmacher, K. Towards a methodology for the systematic analysis and design of efficient chemicalprocesses: Part 1. From unit operations to elementary process functions. Chem Eng Process 2008; 47, 12, 2051-2060.[5]          Papalexandri, K.P., Pistikopoulos, E.N. Generalized modular representation framework for processs synthesis. AIChE J1996; 42, 4, 1010-1032.Extended Abstract: File Not UploadedSee more of this Session: Advances In Process IntensificationSee more of this Group/Topical: Process Development Division

Achieving Process Intensification: A Phenomena-Based Synthesis/Design Methodology

http://orbit.dtu.dk/ws/files/6306206/prod11319809485201.PIL_DKB_AIChE_abstract%5B1%5D.pdf

Achieving Process Intensification: A Phenomena-Based Synthesis/Design Methodology

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology