Download or read book Accurate Determination of Optimal Reflux Policies for the Maximum Distillate Problem in Batch Distillation written by Jeffery Scott Logsdon and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "An approach for the accurate solution of optimal control problems that arise in batch distillation is developed and demonstrated. Since the optimal control problem has a natural partitioning of control variables and state variables, we develop a nonlinear programming decomposition strategy to (1) exploit the block matrix form of the discretized differential equations that results from using collocation on finite elements, and (2) perform the optimization in the reduced space of the control variables. State variables for each finite element are determined by linearized differential equations and information is passed from element to element by chainruling the state information. In addition, the nonlinear programming strategy has a great deal of flexibility to determine control variable discontinuities and enforce a wide variety of state and control variable constraints. In this study, we also consider characteristics of the maximum batch distillate problem and show that our approach is especially useful for the optimization of detailed tray-by-tray models with tray and condenser holdups. Here we discuss two formulations: an inequality path constrained problem and the classical endpoint constrained problem. In both cases interesting and unusual optimal policies are determined and compared to current practice. Moreover, parallels are observed between optimal reflux policies for these two problems, and these are also related to findings from previous studies. To handle these problems, nonlinear programs of up to 8000 variables are solved reasonably quickly on a small workstation. Finally, it is observed that more complex batch distillation problems can be handled in a straightforward manner through this approach."
Download or read book Batch Processing Systems Engineering written by Gintaras V. Reklaitis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Batch chemical processing has in the past decade enjoyed a return to respectability as a valuable, effective, and often preferred mode of process operation. This book provides the first comprehensive and authoritative coverage that reviews the state of the art development in the field of batch chemical systems engineering, applications in various chemical industries, current practice in different parts of the world, and future technical challenges. Developments in enabling computing technologies such as simulation, mathematical programming, knowledge based systems, and prognosis of how these developments would impact future progress in the batch domain are covered. Design issues for complex unit processes and batch plants as well as operational issues such as control and scheduling are also addressed.
Download or read book Batch Distillation written by Urmila Diwekar and published by CRC Press. This book was released on 2011-12-21 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most available books in chemical engineering mainly pertain to continuous processes, with batch distillation relegated to a small section. Filling this void in the chemical engineering literature, Batch Distillation: Simulation, Optimal Design, and Control, Second Edition helps readers gain a solid, hands-on background in batch processing. The seco
Download or read book Batch Processing written by Urmila Diwekar and published by CRC Press. This book was released on 2014-02-25 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although batch processing has existed for a long time, designing these processes and unit operations has been considered an onerous task that required computational efforts. Design of these processes is made more complex because of the time dependent nature of the process and the allowable flexibility. More often than not, every unit encounters opt
Download or read book Batch Processes written by Ekaterini Korovessi and published by CRC Press. This book was released on 2005-09-26 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reduced time to market, lower production costs, and improved flexibility are critical success factors for batch processes. Their ability to handle variations in feedstock and product specifications has made them key to the operation of multipurpose facilities, and therefore quite popular in the specialty chemical, pharmaceutical, agricultural, and
Download or read book Advanced Process Engineering Control written by Paul Serban Agachi and published by Walter de Gruyter GmbH & Co KG. This book was released on 2023-11-20 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a mature topic in chemical engineering, the book provides methods, problems and tools used in process control engineering. It discusses: process knowledge, sensor system technology, actuators, communication technology, and logistics, design and construction of control systems and their operation. The knowledge goes beyond the traditional process engineering field by applying the same principles, to biomedical processes, energy production and management of environmental issues. The book explains all the determinations in the "chemical systems" or "process systems", starting from the beginning of the processes, going through the intricate interdependency of the process stages, analyzing the hardware components of a control system and ending with the design of an appropriate control system for a process parameter or a whole process. The book is first addressed to the students and graduates of the departments of Chemical or Process Engineering. Second, to the chemical or process engineers in all industries or research and development centers, because they will notice the resemblance in approach from the system and control point of view, between different fields which might seem far from each other, but share the same control philosophy.
Download or read book Distillation and Absorption 97 written by Richard Darton and published by IChemE. This book was released on 1997 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents reports from the 1997 conference, held in Maastricht, Netherlands. The papers, covering a broad range of topics from the estimation of physical properties to the design and performance of contacting trays, demonstrate the high rate of advance in technology.
Download or read book Nonlinear Programming written by Lorenz T. Biegler and published by SIAM. This book was released on 2010-10-14 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive treatment of nonlinear programming concepts and algorithms, especially as they apply to challenging applications in chemical process engineering.
Download or read book European Symposium on Computer Aided Process Engineering 12 written by J. Grievink and published by Elsevier. This book was released on 2002-04-29 with total page 1059 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 182 papers presented at the 12th Symposium of Computer Aided Process Engineering (ESCAPE-12), held in The Hague, The Netherlands, May 26-29, 2002. The objective of ESCAPE-12 is to highlight advances made in the development and use of computing methodologies and information technology in the area of Computer Aided Process Engineering and Process Systems Engineering. The Symposium addressed six themes: (1) Integrated Product&Process Design; (2) Process Synthesis & Plant Design; (3) Process Dynamics & Control; (4) Manufacturing & Process Operations; (5) Computational Technologies; (6) Sustainable CAPE Education and Careers for Chemical Engineers. These themes cover the traditional core activities of CAPE, and also some wider conceptual perspectives, such as the increasing interplay between product and process design arising from the often complex internal structures of modern products; the integration of production chains creating the network structure of the process industry and optimization over life span dimensions, taking sustainability as the ultimate driver.
Download or read book Practical Distillation Control written by W.L. Luyben and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distillation column control has been the the "Lehigh inquisition" and survived! So it subject of many, many papers over the last has been tested by the fire of both actual half century. Several books have been de review by a hard-nosed plant experience and voted to various aspects of the subject. The group of practically oriented skeptics. technology is quite extensive and diffuse. In selecting the authors and the topics, There are also many conflicting opinions the emphasis has been on keeping the ma about some of the important questions. terial practical and useful, so some subjects We hope that the collection under one that are currently of mathematical and the cover of contributions from many of the oretical interest, but have not been demon leading authorities in the field of distillation strated to have practical importance, have control will help to consolidate, unify, and not been included. clarify some of this vast technology. The The book is divided about half and half contributing authors of this book represent between methodology and specific applica tion examples. Chapters 3 through 14 dis both industrial and academic perspectives, and their cumulative experience in the area cuss techniques and methods that have of distillation control adds up to over 400 proven themselves to be useful tools in at tacking distillation control problems.
Download or read book Distillation and Rectification written by Emil Kirschbaum and published by . This book was released on 1948 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: A. Fundamentals - B. Theory - I. Units - II. Interrelation between vapor concentration and partial pressure of vapor in multicomponent mixtures - III. Equilibrium of boiling multicomponent mixtures - IV. Partial condensation of mixtures - V. Heat of evaporation of mixtures - C. Separation of liquids by simple distillation; the simple pot still - I. Data for computation - II. Design of kettle stills - III. Separation by distillation and partial condensation - D. The rectifying column - I. Effect of rectifying plates - II. Hookup of reflux condensers - III. Layout of a batch-type distillation unit - IV. Computation of the number of plates for a batch type distillation unit - V. Minimum reflux ratio and actual reflux ratio for batch-type rectifiers - VI. The rectification mechanism on interchanger plates - VII. Heat consumption and reboil heat for a pot still and rectifying column - E. Continuous distilling equipment having rectifying and stripping sections - I. Determination of the number of plates - II. Minimum reflux ratio of a continuous rectifying unit for separating binary mixtures - III. The actual reflux ratio of a continuous rectifying unit - IV. Mass-concentration interrelations - V. Heat requirements - VI. Reduction of heat requirements - VII. Layout of continuous rectifying equipment for handling binary mixtures - VII I. Special cases - IX. Location of the feed point - X. Heat losses - XI. Variation of the molar heat of evaporation in the interchanger column - F. Treatment of rectification using enthalpy-concentration diagrams - I. The rectifying column - II. The continuous rectifying unit - G. Separating mixtures containing more than two components - I. Eliminating small amounts of certain components in a mixture - II. Separation of ideal ternary mixtures - III. Number of rectifying columns required to separate multicomponent mixtures and their hookup - IV. Rectifying ideal mixtures of more than three components - H. Determining the dimensions of rectifying columns with interchanger plates; plate efficiency - I. Cap-type and tunnel-type plates - II. Sieve plates - III. Comparison of cap-type and sieve-type plates - IV. Influence of the direction of flow of the phases on the rectification effect of a plate; liquid mixing, vapor mixing, counterflow arid parallel flow - V. Rectifying plate design - J. Rectification in packed columns - I. General remarks - II. Determining the column height by means of the corresponding theoretical plate number; different types of packings - III. Determination of column height from the heat transmission coefficient between phases; liquid distribution within the column - IV. Pressure loss in packed columns - K. Details - I. Heat exchangers - II. Control equipment - L. Molecular distillation - M. Appendix - I. Equilibrium data for binary mixtures - II. Heats of evaporation of various materials at - 760 mm Hg - III. Specific heats and specific weights of liquids - IV. Molecular weights - V. Conversion tables - N. Review by the translator of progress made since the original publication - Index -
Download or read book Conceptual Design of Distillation Systems with CD ROM written by Michael F. Doherty and published by McGraw-Hill Science/Engineering/Math. This book was released on 2001-01-18 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a pioneering effort by two of the world's top researchers. The authors have fashioned a text which develops models, the basis for software tools for conceptual design. The book clearly addresses both analysis and design with sharp attention to supplying mathematical correctness and providing physical insight. A software supplement accompanies the text in a student version.
Download or read book Batch Processing written by Urmila Diwekar and published by CRC Press. This book was released on 2014-02-25 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although batch processing has existed for a long time, designing these processes and unit operations has been considered an onerous task that required computational efforts. Design of these processes is made more complex because of the time dependent nature of the process and the allowable flexibility. More often than not, every unit encounters optimal control problems. Therefore, traditional design books have not covered batch processing in detail. Filling this void, Batch Processing: Modeling and Design describes various unit operations in batch and bio-processing as well as design methods for these units. Topics include: Batch distillation operating modes and configurations Batch absorption operations based on the solubility difference Batch adsorption based on differential affinity of various soluble molecules to solid absorbents Batch chromatography for measuring a wide variety of thermodynamic, kinetic, and physico-chemical properties Batch crystallization where a phase is used to find the supersaturation at which point material crystallizes Batch drying that stresses the phase diagram of water to describe this operation Batch filtration using a porous medium or screen to separate solids from liquids Batch centrifugation where centrifugal force is used for separation Batch processes are widely used in pharmaceutical, food, and specialty chemicals where high value, low volume products are manufactured. Recent developments in bio-based manufacturing also favor batch processes because feed variations can be easily handled in batch processes. Further, the emerging area of nanomaterials manufacturing currently uses batch processes as they are low volume, high energy intensive processes. With examples, case studies, and more than 100 homework problems, this book describes the unit operations in batch and bioprocessing and gives students a thorough grounding in the numerical methods necessary to solve these design problems.
Download or read book AIChE Symposium Series written by American Institute of Chemical Engineers and published by . This book was released on 2000 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Batch Distillation Design And Operation written by Iqbal M Mujtaba and published by World Scientific Publishing Company. This book was released on 2004-03-29 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The batch distillation process has existed for many centuries. It is perhaps the oldest technology for separating or purifying liquid mixtures and is the most frequently used separation method in batch processes. In the last 25 years, with continuous development of faster computers and sophisticated numerical methods, there have been many published works using detailed mathematical models with rigorous physical property calculations and advanced optimisation techniques to address several important issues, such as selection of column configurations, design, operation, off-cut recycling, use of batch distillation in reactive and extractive modes, etc.Batch Distillation: Design and Operation presents excellent, important contributions of many researchers from around the globe, including those of the author and his co-workers./a
Download or read book Encyclopedia of Separation Science written by Michael Cooke and published by . This book was released on 2000 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Control of Batch Distillation Process by Neural Network Approach written by Arbhawadee Deachalamai and published by . This book was released on 2006 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Batch distillation, one of separation processes used in many industries, especially food, pharmaceuticals, and fine chemicals, is inherently complex and nonlinear dynamic behavior and is therefore very attractive issues in determining reliable models and appropriate control systems. In this work, a multilayer feedforward neural network is applied for modeling and control of a batch distillation process. This work is divided into two sections: system modeling, and control system applications. In the first one, it can be seen that the network with two hidden layers is able to represent the process behavior better than that with only one layer. In the other one, a model predictive controller based on neural network models is formulated to control the cyclohexane composition at the top plate. It can be seen that the controller provides good control response for tracking the cyclohexane composition determined by an optimization approach of batch distillation process under an optimal reflux ratio condition. Moreover, the controller gives robust tracking capability under plant/model mismatch.
