Home courses unit operation i solved problems problem 2. Jul 25, 2007 the feed is a two phase mixture with a feed quality is equal to 0. Reflections on the use of the mccabe and thiele method. Depending on the available information, the objective can be one of determining top or bottom. Equilibrium separation column jordan university of. It uses the fact that the composition at each theoretical tray or equilibrium stage is completely determined by the mole fraction of one of the two components and is based on the assumption of constant molar overflow which requires that. The distillate, feed and bottom mole fractions are 0. This type of problem is best solved using a spreadsheet, see the solution to problem 11. A third way to measure the positivity of a divisor is the volume. The mccabe thiele method is considered to be the simplest and perhaps most instructive method for the analysis of binary distillation. We draw the mccabe and thiele diagram and get the number of theoretical plates equal to 9. Hamiltons principle and lagrange equations for static problems we can use the principle of minimum potential energy to simplify obtaining equations of equilibrium for dynamic problems, strangely enough, it is the difference between kinetic and potential energy that provides the same service this device, originally developed to. At undergraduate level, the separation of binary mixtures is studied using, mainly, the mccabe thiele method because of the advantage to present the results in graphical form.
Problems with trays adverse vapour flow conditions can cause. Performing multiphase mass and energy balances separations performing multi phase mass and energy balances. For example, you might have the system to recommend the location from which to pick the components, or you might want to view all locations and then select one. What is striking is the fact that, after the mathematical model of sorel was published, these other methods were proposed for solving the related equations graphically or algebraically during an 18year. Mccabe thiele method for designing of binary distillation column by. By the use of the mccabethiele method and the advantage of a solvepackage mathead tm, a procedure is proposed to solve problems with.
Thermodynamic analysis of multicomponent distillation. The values of reflux ratio, boilup ratio as well as percentage of lk in distillate in bottoms are needed to run this script. Uses the mccabethiele graphical method to determine the number of equilibrium stages in a distillation column. Multiple feeds total condenser feed 1 overhead vapor boilup distillation column multiple feeds reflux drum bottoms partial reboiler reflux distillate feed 2 the mccabe thiele method for cascades can be applied to systems with more than two sections.
Excel spreadsheets are increasingly used in chemical engineering education and industrial practice 5. The normal procedure for a typical problem is to solve the mesh material balance, equilibrium, summation and heat balance. Buy best made easy civil engineering books for the preparation of uppsc ae exam 201920. For example, if the feed is a saturated liquid it has no vapor, thus q 1 and the slope. The feed stream is already of high purity thereby making a mccabe thiele diagram very difficult to draw as the feed, bottom product and top product are all very close. Jul 10, 2009 the wolfram demonstrations project contains thousands of free interactive visualizations, with new entries added daily. The number of stages can then be calculated using a mccabe thiele diagram, or the other methods developed for binary. Automatically draws the classic mccabe thiele plot.
Acorga now carries a large data file of isotherm and mccabe thiele information for most of the solvent extraction conditions likely to be met in practice, and therefore can rapidly give a first assessment of the reagent type and concentration required for any potential project. Use of the mccabethiele method for solving destillation. Ficks first law of diffusion a simple explanation of ficks first law of diffusion. Plotting mccabethiele diagrams in microsoft excel for non. Mccabethiele method mass transfer solved problems msubbu free download as pdf file. Mccabethiele graphing for an ideal mixture file exchange. Mccabethiele method mass transfer solved problems msubbu. The area of lightquark meson spectroscopy deals with. Use the mccabe and thiele method to determine the number of plates. The mccabethiele method is considered to be the simplest and perhaps most. Working on the hx diagram is more general than a mccabe thiele construction, because it takes direct account of the thermal effects and does not require an assumption of equimolal overflow.
As mentioned, distillation columns are designed using vle data for the mixtures to. Please can anyone help me how to obtain the number of trays and reflux ratio using the mccabethiele method for this example. Short cut method including reactive vapor liquid efficiency. Mccabethiele method for an ideal binary mixture file. Cooling load calculation of a single family house using cltd. For a good overview of the mccabe thiele method as applied to binary distillation problems, see geankoplis 1, pages 706724. Mar 19, 2016 this script computes and plots required number of stages in distillation column.
Use of the mccabe thiele method for solving destillation problems with nonconventional specification. The positive product of bdpp04 gives a precise method of taking intersection products while discounting these contributions. When dealing with a trinomial, we must first make sure that is in descending order. This method is applicable to a single feed distillation column with only distillate and. Thiele graphical method example part 1 uses the mccabe thiele graphical method to determine the number of equilibrium stages in a distillation column.
The mccabe thiele graphical solution method for binary distillation is used to determine the number of equilibrium stages needed to achieve a specified separation in a distillation column. Solve binary distillation problems using lewis and mccabe thiele methods. This application calculates the required number of theoretical stages for a set of specified operating parameters via the mccabe thiele method. Vapour forces liquid away from slots and passes through as a continuous stream. You can manipulate some of the data and see the immediate graphical changes, which kinda puts the method into perspective a bit more clearly. Modified ponchonsavarit and mccabe thiele methods for download as pdf file. We will do this in the selection from separation process engineering. The mccabe thiele method for cascades can be applied to systems with more than two sections. Binary distillation using mccabe thiele diagram calculates total number of stages, feed point required to separate a binary mixture with given relative volatility, reflux ratio, feed, bottom, distillate mol fraction. This second task is done by a method that first identifies the presence of a problem and, then, finds out the final contributors that explain such a problem. This article demonstrates how excel may be used for chemical engineering computation and visualization. By the use of the mccabethiele method and the advantage of a solvepackage mathead tm, a procedure is proposed to solve problems with different specifications. The stage efficiency can be estimated using van winkles correlation or the aicheme method.
The mccabethiele method is valid when we have constant molal overflow in both the rectifying and stripping sections of the distillation column. In order to determine the number of stages necessary for a given separation i. This application also highlights several maple concepts. Learncheme features faculty prepared engineering education resources for students and instructors produced by the department of chemical and biological engineering at the university of colorado boulder and funded by the national science foundation, shell, and the engineering excellence fund. T04 is pinned to the wall at point f, and supported by a roller at point c. Mccabethiele method posted in chemical process simulation. Mccabe thiele graphical method binary distillation 08 0. The identification of problems is done following the heuristic classification method that decomposes the diagnosis task into three subtasks. Calculates number of theoretical stages, minimum reflux ratio, top and bottom product purity and more. Can solve synthesis and design problems other methods cannot solve. Cooling load calculation of a single family house using cltdglf method floor plan of the single family house roof construction conventional roofatticceiling combination u 0. Distillation pinch points and more university of rhode. Pdf 1001 solved problems in engineering mathematics free.
Solve multicomponent distillation problems using approximate shortcut methods. It is a method for calculating the number of theoretical trays required for the distillation of a binary mixture. Pdf mccabethiele method revisitedsolving binary distillation. Thus, this paper details a method for generating a mccabe thiele diagram using microsoft excel. With the mccabethiele method, the total number of necessary plates, as well as the feed plate location can bidd if i lbbe estimated, and some information can also be determined about the enthalpic condition of the feed andrefluxratio. The mccabethiele method is considered to be the simplest and perhaps most instructive method for the analysis of binary distillation. Hii am desiging a distillation column for the binary separation of two products. Cosc 480math 482 example big m walkthrough fall 2012 heres the problem. I think this spreadsheet is stunningly helpful for understanding the mccabe thiele method for the analysis of binary distillation. Pdf a graphic mccabe thiele method is developed for application to fully reactive column configuration. This article describes how to apply the mccabe thiele method. The mccabethiele method is considered to be the simplest and perhaps most instructive. Apply the mccabe thiele graphical design method to determine the number of equilibrium stages in a column describe column internals trays and packing define tray efficiency explain the height of packing equivalent to a theoretical plate thanks to ming thamswebsite for pictures and information. April 8, 2006 in the past three years, argentina has experienced a remarkable recovery from one of the most severe economic depressions on record.
It plots the classic mccabe thiele diagram and evaluates the minimum and actual reflux ratio, and the thermodynamic state of the feed. Vapour accumulates and eventually passes as a pulse. Includes mass transfer analysis, third edition book. So this tool was designed for free download documents from the internet. The use of the mccabe 4 thiele method and the ponchon 5savarit6 for solving binary distillation problems in chemical engineering have a long history going back to the early 1920 s. When using the issue method, you generate a picking plan that specifies certain parameters for picking components. This is consistent with the fact that chemsep uses a different window for each problem. The mccabethiele method allows full control over reboiler duty, and it is not uncommon to first solve a problem assuming minimum reflux ratio. This paper presents a method to automate the process of fitting binary equilibrium data to a smooth curve using a cubic bspline algorithm implemented via visual basic for applications vba in microsoft excel and then drawing the mccabe thiele diagram in microsoft excel. Unlike the traditional application, the number of stages can or can not be specified. After the lecture on march 6 th, we have covered the material needed to solve problems 1, 2a and b, and 3a, and to start setting up 3d. Liquidliquid extraction example uses the hunternash graphical method to solve a liquidliquid.
What links here related changes upload file special pages permanent link page. Download file pdf treyball mass transfer operation solutions countercurrent and cocurrent flow concepts in chemical engineering raj musale. Describe the distillation process determine the vapour liquid equilibrium vle data for a binary mixture determine the number of stages required to achieve a specified separation using the mccabe. This demonstration presents the mccabe thiele graphical method applied to the waterethanol mixture. The close option returns the current window to the state of a new problem and will ask you to save the problem when any changes would get lost in the process. This excel spreadsheet for mccabethiele method is awesome. Use this method to issue components for a defined period of production. By the use of the mccabe thiele method and the advantage of a solve package mathcad, a procedure is proposed to solve problems with different specifications. As this is to be treated as a binary system, the mccabethiele method can be used to determine the number of theoretical stages.
Problem 003ms method of sections problem 003ms the truss in fig. Lee, jang soo mccabe thiele method for designing of binary distillation column by. By the use of the mccabe thiele method and the advantage of a solve package mathead tm, a procedure is proposed to solve problems with different specifications. The fast growth path that the country is currently embarked in is jeopardized, however, by three serious problems. Solving mass transfer problems on the computer using mathcad.
How do you make the mccabe thiele graphical construction for such a cascade. Distillation problem mccabethiele posted in student. A mixture of water and ethanol was distilled in a raschig ring. It can be seen that we have loaded the binary interaction parameters from the library that comes with chemsep. For those unfamiliar with the techniques, they are highly graphical in nature. The mccabe thiele method is a graphical procedure to solve alternately the equilibrium relation and the material.
Apr 17, 2017 a mccabe thiele plot is a simplified tool to assist in understanding distillation. The method, we are going to illustrate in this section, is known under the name of fenskeunderwoodgilliland fug, from the three guys which developed the three different parts of the method in order to. Mccabethiele method revisitedsolving binary distillation. Thus, the objective of this paper is to point out and analyze, the application of the mccabe thiele method using generalized equations for the operative lines for the. Binary distillation with multiple feeds binary distillation example with multiple feeds solved using mccabe thiele analysis. This method relies on representing the material balances equation 49 and the equilibrium relation equation 51 graphically and counting the number of theoretical stages and feed location based on simplifying assumptions. Derive the top operating line equation in terms of the reflux ratio r.
The mccabethiele diagram enabled decades of effective design and operational analysis of distillation columns, and has been used to teach several generations of chemical engineers to design and troubleshoot distillation and other cascaded processes. Effect of relative volatility on number of stages 100 kgmolehr of a mixture containing 50 mole percent a and 50 mole percent b is to be fractionated to a distillate containing 90 mole percent a and a residue containing 90 mole percent b using a total condenser and feed at its saturated liquid condition. Aug 15, 2010 my first attempt at making a mccabe thiele program. Try your hand at a sample mccabethiele problem and learn how to approximate equilibrium stages and reflux ratio with aiches distillation in. Practice problems in distillation practice problems in. Plotting mccabethiele diagrams in microsoft excel for. First, the rectifying cyan and stripping magenta operating lines are plotted using a reflux ratio equal to 1.
Mccabethiele method gui for binary column distillation. The success of this method depends upon the difference in solubility of a compound in. Distillation calculations can be performed graphically on an enthalpyconcentration hx diagram. Hunternash graphical method to solve a liquidliquid extraction separation problem.
We break trinomials into 2 cases, trinomials with leading coefficient 1 ie. Results can be scaled to actual reflux ratio, typically r 1. Geankoplis separation process principles solution manual. Visualizing the mccabethiele diagram semantic scholar. Cosc 480math 482 example big m walkthrough fall 2012. Mccabe thiele graphical method to determine the number of equilibrium stages in a distillation column. Mccabethiele graphical method example part 1 youtube. Solvent extraction sx is based on the transfer of a solute from one liquid phase into another liquid phase. Mccabethiele graphical method for a nonideal binary mixture.
Rojas, jr about us we believe everything in the internet must be free. The mccabethiele method applied to single section contactors. Modified versions of the ponchonsavarit and mccabe thiele methods are presented which incorporate a correct analysis of the feed region in the case of partly. A 100 kmolhr stream of ethanol 50 mol% and npropanol 50 mol% is fed to a continuous distillation column at room temperature 298 k and atmospheric pressure. A critical component of solving distillation problem is knowing whether. This approach is sometimes called the ponchonsavarit method. Any suggestions for help would be greatly appreciatedthanks. An example of the mccabe thiele is shown in figure 77.
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