Pdf reactive distillation in process industries researchgate. In this paper, we study the dynamics and control of a reactive distillation column for the production of ethyl acetate from acetic acid and ethyl alcohol. The scaleup of reactive distillation columns with catalytic packings requires the knowledge of reaction kinetics, phase equilibrium and packing characteristics. Especially for equilibrium reactions like esterifications, ester hydrolysis and. Pdf nonlinear model predictive control of a reactive. Taking reactive distillation to the next level of process. In a reactive distillation column, both the chemical conversion and the distillative separation of the product mixture are carried out simultaneously. About the author kai sundmacher and achim kienle are the authors of reactive distillation. Performance analyses of fatty acids in reactive distillation process for biodiesel production abdulwahab giwa1, alhassan bello2, saidat olanipekun giwa3 1chemical and petroleum engineering department, college of engineering, afe babalola university, km. Increased process efficiency and reduction of investments and. The suitability of rd for a particular reaction depends on various factors such as volatility of reactants and products along with the feasible reaction and distillation temperature. Conceptual design of reactive distillation columns using stage composition lines matthias groemping, ramonam dragomir and megan jobson degussa ag, hanau, germany department of process integration, umist, manchester, uk a conceptual design methodology for the synthesis of reactive distillation columns is presented.
Reactive distillation stands out as a successful example of a process intensification technology for enhanced chemical manufacture. Kai sundmacher and achim kienle are the authors of reactive distillation. Reactive distillation rd is an efficient process intensification technique that. A method dedicated to reactive distillation feasibility analysis, and design has been developed in our team since 1999. The butene feed is a mixture of reactive isobutene and non reactive nbutene. Wasewar is presently with environmental management and system. The development and optimization of an empirical model of a reactive distillation process producing palmitic acid methyl ester pame, with the aid of minitab, have been carried out in this work. The structured packing was filled with amberlyst 15 ion.
To design the columns, a method based on the fenske. Plantwide control of a reactive distillation process. Reactive distillation is a process where simultaneous chemical reaction and vapourliquid phase separation take place. Methyl acetate production, reactive distillation and conventional process. Because of the continuous removal of products formed during the reaction, the. Nonlinear model predictive control of a reactive distillation column. Simulation study of reactive distillation column for the. This technique can be useful for equilibriumlimited reactions such as esterification and ester hydrolysis reactions. Also, giwa and giwa 2012 used design expert and excel solver to optimize a reactive distillation process used for the production of nbutyl acetate, modeled with. A generalized method for the synthesis and design of reactive distillation columns. The top nonreactive rectifying section performs the separation of inert gases and 4076 iii reactive distillation. Modla, 2011, which are based on different column configurations. Novel method for mapping the applicability of reactive distillation.
Process envelope, including requirements from kiss 20 rd is especially attractive in systems where certain chemical and phase equilibrium conditions coexist. This cited by count includes citations to the following articles in scholar. Catalytic distillation is a branch of reactive distillation which combines the processes of distillation and catalysis to selectively separate mixtures within solutions. June 2012 multistage countercurrent bubbled slurry reactor methanol provides 3 important functions. Steadystate design procedure oplace the heavy reactant feed nfheavey on the top of the reactive zone and specify the light reactant feed nflight several trays apart from the upper feed tray.
Index terms modeling, simulation, reactive distillation, aspen plus. Some important advantages of reactive distillation. Reactive distillation is a process where a chemical reaction occurs in the still, as it is the integration. Reactive distillation for methyl acetate production robert s.
A batch reactive distillation column to produce the ethyl acetate studied in this work is shown in fig. Reactive distillation rd is a process in which a catalytic chemical reaction and distillation frac tionation of. A design methodology for thermally coupled reactive distillation systems is proposed in this work. The chemical reaction usually takes place in the liquid phase or at the surface of a solid catalyst in contact with the liquid phase. Reactive distillation is the integration of reaction and distillation within the same compartment of space and time of one co lumn. In this work, integrated design and control of reactive distillation processes is presented. The reaction and distillation take place in the same zone of a distillation. Experience in reactive distillation klaus althaus hartmut g. Reactive distillation rd is a great process intensification concept applicable to equilibrium limited reaction systems, but how can anyone decide quickly if rd is. Because of the continuous removal of products formed during the reaction, the conversion limitation of equilibrium is avoided. Dynamics of reactive distillation for the production of ethyl acetate. The earliest case of catalytic distillation was thought to have dated back to 1966.
Reactive distillation is a combination of reaction and separation in a single column. Steadystate modeling of reactive distillation columns. The reactive distillation column is composed of three sections, the middle of which is a reactive zone packed with a solid catalyst. Production of esters in a reactive distillation column is a promising alternative to the conventional sequential process. After almost a century of development, it has achieved a high degree of maturity in terms of design capabilities, the availability of commercial suppliers of hardware and software, and a large variety of processes effectively implemented at the. Feasibility analysis, synthesis, and design of reactive. Simple graphical design methods that are similar in concept to non reactive distillation processes are used, such as reactive mccabethiele method and driving force approach. Simulations and economic analyses of ethyl acetate.
Lesson objectives learn how to specify reactions in aspen plus learn how to configure a reactive distillation column in aspen plus 2. Abstract this work presents the modeling and simulation of ethyl acetate reactive distillation column using aspen plustm simulation software. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Robin smith department of process integration manchester, united kingdom march 2004. The conventional and the reactive distillation process methods used for the production of ethyl acetate were modeled and simulated in this work with the aid of aspen plus aspen, 2012. Reactive distillation process development in the chemical. Disclosed is a method for making dimethyl ether by reactive distillation. Initially, we propose a configuration that involves feeding the two reactants in different trays and allows for the attainment of higher conversion and purity at the steady state than does the conventional configuration, which involves.
Synthesis and design of reactive distillation columns a thesis submitted to the university of manchester institute of science and technology for the degree of doctor of philosophy by ramona manuela dragomir under the supervision of dr. Hence, the use of rd for every reaction may not be feasible 2. Reactive distillation is a process where the chemical reactor is also the still. Its main function is to maximize the yield of catalytic organic reactions, such as the refining of gasoline. Schoenmakers1 basf ag, process engineering, d67056 ludwigshafen, germany abstract reactive and catalytic distillation has attracted growing interest, both in industry and. Novel catalytic reactive distillation processes for a sustainable. As a result it prevents the loss of extra energy in terms of heating. Conversion can be increased beyond what is expected by. This method is best for the esterification and ester hydrolysis reactions.
Pdf on apr 1, 2019, vandana sakhre and others published reactive distillation. Simulate a reactive distillation column with aspen plus v8. The developed models are as shown in figures 1 and 2 below respectively for the conventional and the reactive distillation ethyl acetate production processes. Reactive distillation an overview sciencedirect topics. The method provides a reactive distillation tower with a top, a bottom, and rectification, reaction and stripping zones defined therein. Separation of the product from the reaction mixture does not need a separate distillation step, which saves energy for heating and materials. Reactive distillation and reactive absorption is an important example of a reactive separation process. Synthesis and design of reactive distillation columns. High purity ethyl acetate production with a batch reactive.
Dynamics of reactive distillation for the production of ethyl. It provides agitation for the resin catalyst reactive distillation column. Doherty department of chemical engineering, university of. Enter a stoichiometric coefficient of 1 for each component and select equilibrium as the reaction type. In the reactive distillation process, separation procedure doesnt need separate set up. Reactive distillation is a technique which combines chemical reactions and product separation in one unit. 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. Introduction to chemical engineering calculations lecture 9 solving material balances problems involving non reactive processes prof.
A new approach for the feasibility analysis of reactive distillation processes based on the reactive extractive curve maps rexcm concept is introduced. Reactive distillation for methyl acetate production. Reactive extraction is a multifunctional reactor having reaction and extraction in a. Reactive distillation integrates reaction and distillation. Reactive distillation rd is a great process intensification concept taking advantage of the synergy created when combining catalyzed. Description after an overview of the fundamentals, limitations, and scope of reactive distillation, this book uses rigorous models for steadystate design and dynamic analysis of different types of reactive distillation columns and quantitatively compares the economics of reactive distillation columns with conventional multiunit processes.
21 350 887 1313 1545 751 1058 1080 1483 557 721 985 1133 467 1426 138 1488 1450 590 272 590 1223 203 938 126 1300 1238 850 183 1020 996 1398 173 93