Download or read book Study of Dynamic Behavior of Ethyl Acetate Reactive Distillation Column Using ASPEN PLUS written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reactive distillation (RD), the combination of chemical reaction and distillation in a single unit operation, has proven to be advantageous over conventional process systems consisting of separate reactor and distillation units. But the dynamic behavior of process is difficult to study. In this thesis, a reactive distillation column for ethyl acetate production has been created in ASPEN user interface. Steady state simulations are done in ASPEN user interface and the effect of reflux ratio on the composition of ethyl acetate in the distillate is studied. In ASPEN DYNAMICS the composition control studies for ethyl acetate purity has been studied both in the distillate and in the bottoms.
Download or read book Modelling and Simulation of Ethyl Acetate Reactive Distillation Column Using ASPEN PLUS written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we study the modeling and simulation of a reactive distillation column for the production of ethyl acetate from acetic acid and ethyl alcohol using ASPENPLUS. Starting from a conventional configuration, which involves feeding in a single tray, different configuration is proposed and various specifications are studied for the attainment of higher conversion and purity at the steady state. In ASPEN DYNAMICS an analysis of the column dynamics is then performed. Cascade control structure is studied for the base design.
Download or read book Distillation Design and Control Using Aspen Simulation written by William L. Luyben and published by John Wiley & Sons. This book was released on 2006-04-20 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: A timely treatment of distillationcombining steady-state designand dynamic controllability As the world continues to seek new sources of energy, the distillation process remains one of the most important separation methods in the chemical, petroleum, and energy industries. And as new renewable sources of energy and chemical feedstocks become more universally utilized, the issues of distillation design and control will remain vital to a future sustainable lifestyle. Distillation Design and Control Using Aspen Simulation introduces the current status and future implications of this vital technology from the dual perspectives of steady-state design and dynamics. Where traditional design texts have focused mainly on the steady-state economic aspects of distillation design, William Luyben also addresses such issues as dynamic performance in the face of disturbances. Utilizing the commercial simulators Aspen Plus and Aspen Dynamics, the text guides future and practicing chemical engineers first in the development of optimal steady-state designs of distillation systems, and then in the development of effective control structures. Unique features of the text include: * In-depth coverage of the dynamics of column design to help develop effective control structures for distillation columns * Development of rigorous simulations of single distillation columns and sequences of columns * Coverage of design and control of petroleum fractionators Encompassing nearly four decades of research and practical developments in this dynamic field, the text represents an important reference for both students and experienced engineers faced with distillation problems.
Download or read book Reactive Batch Distillation of Ethyl Acetate written by and published by . This book was released on 2007 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reactive distillation is a multi-functional unit operation combining chemical reactor and distillation column in a single unit. Fatty acid esterification is increasingly realized as a reactive distillation (RD) process because of its formation being affected by the chemical equilibrium. In this work, a detailed mathematical dynamic rate-based model of reactive batch distillation column is formulated for ethyl acetate synthesis and presented as a system of differential and algebraic equations (DAEs). The developed model is then solved to obtain the detailed column dynamics. The simulation results provide the dynamics of reboiler and distillate compositions, ethyl acetate purity in the accumulated distillate and conversion of the reactants. These simulation results are compared with experimental data, and it indicates a very good agreement. The developed model is then applied to formulate dynamic optimization problem in order to derive the optimum operating policy, reflux profile.
Download or read book Promising Techniques for Wastewater Treatment and Water Quality Assessment written by Iqbal Ahmed and published by BoD – Books on Demand. This book was released on 2021-12-01 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the primary aspects of wastewater treatment processing techniques and designs, as well as water quality assessment. Chapters address microwave digestive techniques of wastewater treatment, advanced ozone oxidative and photo processes, and reactive distillation for various applications. The book is a useful resource for choosing applicable processing techniques and design parameters.
Download or read book Simulation of Ethyl Acetate Synthesis Via Reactive Distillation written by Khairul Naim Bin Ahmad and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ethyl acetate (EtAc) is mainly used as solvent in paints, adhesives and coatings, eliminating the use of aromatic compounds. Reactive distillation is a type of process intensification in which the separation and reaction is combined in one vessel. In this work, reactive distillation (RD) process for EtAc was implemented using process simulator Aspen HYSYS by applying the data obtained from the bibliography. A sensitive analysis was performed to determine the effects of key design and operating variables on column performance and, subsequently, an optimal column configuration was obtained.
Download or read book Reactive Distillation Design and Control written by William L. Luyben and published by John Wiley & Sons. This book was released on 2009-03-30 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an overview of the fundamentals, limitations, and scope of reactive distillation, this book uses rigorous models for steady-state design and dynamic analysis of different types of reactive distillation columns and quantitatively compares the economics of reactive distillation columns with conventional multi-unit processes. It goes beyond traditional steady-state design that primarily considers the capital investment and energy costs when analyzing the control structure and the dynamic robustness of disturbances, and discusses how to maximize the economic and environmental benefits of reactive distillation technology.
Download or read book Nonlinear Model Reduction and Control of Multiple Time Scale Chemical Processes written by Nishith Pramod Vora and published by . This book was released on 2000 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation Study of Reactive Distillation Using Aspen Plus for the Production of MTBE written by Nik Rozaimah Salim and published by . This book was released on 2010 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Dynamic Behavior of Distillation Columns written by Yiliang Chi and published by . This book was released on 1993 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical and Numerical Approximations of Reactive Distillation Dynamics written by Varong Pavarajarn and published by . This book was released on 1996 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two approaches to reduce computational requirements for solving reactive distillation problems have been studied: simplification of the model using physical assumptions and numerical approximation using an orthogonal collocation technique. The results of a full-order model with time dependent stage molar holdups was compared to published steady-state experimental data and was found to be more accurate than previously published methods. Two example problems concerning reactive distillation columns with different number of stages were investigated in order to find limitations of the order-reduction technique. The steady-state results obtained in both cases were remarkably accurate, even though the reduced-order model contained only 40 percent of the number of equations. However, step and pulse responses indicated that very low order models did not provide good approximations in the dynamic behavior of a column which contained 29 stages. Modeling errors introduced by either physical or numerical approximations were compared for several example problems. The results showed that the reduced-order models with time-dependent holdups provided better steady-state and dynamic results than models using the physical approximation of constant molar holdups in almost every case. The only case in which the reduced-order model failed was when the 40% order-reduction model was used to approximate dynamic responses of a column with a significant pressure drop across each tray. The effects of plate and weir geometries were also studied. The results obtained indicated that the volume holdup on the plate was the dominant parameter: columns with plates of different sizes but the same steady-state holdup behaved similarly.
Download or read book Development of Dynamic Models of Reactive Distillation Columns for Simulation and Determination of Control written by Arnab Chakrabarty and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic models of a reactive distillation column have been developed and implemented in this work. A model describing the steady state behavior of the system has been built in a first step. The results from this steady state model have been compared to data provided from an industrial collaborator and the reconciled model formed the basis for the development of a dynamic model. Four controlled and four manipulated variables have been determined in a subsequent step and step tests for the manipulated variables were simulated. The data generated by the step responses was used for fitting transfer functions between the manipulated and the controlled variables. RGA analysis was performed to find the optimal pairing for controller design. Feedback controllers of PID type were designed between the paired variables found from RGA and the controllers were implemented on the column model. Both servo and regulatory problems have been considered and tested.
Download or read book Reactive Distillation Modeling and Simulation Using Aspen Plus written by Sohail Lone and published by . This book was released on 2012 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling and Control of Reactive Distillation for Alkylation Reactions written by John R. Schell and published by . This book was released on 2002 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reactive distillation column for the alkylation of benzene with long chain linear olefin was studied. The study involved design, construction, experimentation, and simulation of the column. Establishing the design required study of reaction rates, thermodynamic relationships, and packing structures. A heuristic was developed for the design of such columns. This heuristic involved estimating an amount of catalyst loading and subsequently determining the operating parameters for a column. This method is particularly applicable to systems with high concentrations of inert feeds. A column was constructed following the design. Data was collected from the column and compared to simulations. The simulations were performed with Aspen Plus RADFRAC. In this manner, the data was used to validate the commercial steady state models for reactive distillation. In addition, dynamic simulations of the system were performed. These dynamic simulations provided insight into more design considerations. For example, steady state simulations indicated an optimal feed stage based on steady state conversion of the olefin. However, the dynamic simulations showed a potential disadvantage to the utilization of the optimal feed stage. With some disturbances, a column configured with the feed stage with the highest steady state conversion also deviated from the steady state faster and with greater amplitude than other configurations. These considerations were further explored in developing a control scheme for reactive distillation columns. Control of reactive distillation differs from traditional distillation in that one control variable is conversion. Traditional distillation generally focuses on production rates and product purity. To this end, control schemes were analyzed and dynamic simulations were performed. These simulations showed an advantage to a variable pairing in which duty is paired with conversion. The conversion was inferred from a stage temperature in the reactive zone. In addition, distillate rate may be paired with product composition. In conclusion, the reactive distillation column design for long chain olefin alkylation of benzene requires careful estimation of catalyst requirements and valid simulation tools. In addition, dynamic response should be considered in the design. Finally, a simple inferential control scheme may be adequate.
Download or read book Chemical Process Design and Simulation Aspen Plus and Aspen Hysys Applications written by Juma Haydary and published by John Wiley & Sons. This book was released on 2019-01-16 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and example oriented text for the study of chemical process design and simulation Chemical Process Design and Simulation is an accessible guide that offers information on the most important principles of chemical engineering design and includes illustrative examples of their application that uses simulation software. A comprehensive and practical resource, the text uses both Aspen Plus and Aspen Hysys simulation software. The author describes the basic methodologies for computer aided design and offers a description of the basic steps of process simulation in Aspen Plus and Aspen Hysys. The text reviews the design and simulation of individual simple unit operations that includes a mathematical model of each unit operation such as reactors, separators, and heat exchangers. The author also explores the design of new plants and simulation of existing plants where conventional chemicals and material mixtures with measurable compositions are used. In addition, to aid in comprehension, solutions to examples of real problems are included. The final section covers plant design and simulation of processes using nonconventional components. This important resource: Includes information on the application of both the Aspen Plus and Aspen Hysys software that enables a comparison of the two software systems Combines the basic theoretical principles of chemical process and design with real-world examples Covers both processes with conventional organic chemicals and processes with more complex materials such as solids, oil blends, polymers and electrolytes Presents examples that are solved using a new version of Aspen software, ASPEN One 9 Written for students and academics in the field of process design, Chemical Process Design and Simulation is a practical and accessible guide to the chemical process design and simulation using proven software.
Download or read book Reactive Distillation written by Achim Kienle and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In a reactive distillation column, both the chemical conversion and the distillative separation of the product mixture are carried out simultaneously. Through this integrative strategy, chemical equilibrium limitations can be overcome, higher selectivities can be achieved and heat of reaction can be directly used for distillation. Increased process efficiency and reduction of investments and operational costs are the direct results of this approach. Highly renowned international experts from both industry and academia review the state-of-the-art and the future directions in application, design, analysis and control of Reactive Distillation processes. Part I surveys various industrial applications and covers both established large scale processes as well as new chemical reaction schemes with high future potential. Part II provides the vital details for analysis of reactive phase equilibria, and discusses the importance of chemical reaction kinetics, while Part III focuses on identifying feasible column configurations and designing their internal structure. Analysis and control of the complex dynamic and steady-state behavior of reactive distillation processes are described in Part IV. Reactive Distillation - a very promising alternative to conventional reaction-distillation flow schemes.
Download or read book Comparative Studies of Dynamic Models for Reactive Distillation Columns written by Peizhi Miao and published by . This book was released on 1995 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
