Mccabethiele method mass transfer solved problems msubbu free download as pdf file. The graphical mccabethiele method can be used to determine the number of ideal stages and feed tray location. Hey guyz i am have to design a distillation system for ethanol production. 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. It plots the classic mccabe thiele diagram and evaluates the minimum and actual reflux ratio, and the thermodynamic state of the feed. This demonstration presents the mccabethiele graphical method applied to the waterethanol mixture.
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. Solvent extraction sx is based on the transfer of a solute from one liquid phase into another liquid phase. This can be seen in the different mccabethiele diagrams, which constitute of the operating line solid line and an equilibrium line dotted line. Multiple feeds total condenser feed 1 overhead vapor boilup distillation column multiple feeds reflux drum bottoms partial reboiler reflux distillate feed 2 the mccabethiele method for cascades can be applied to systems with more than two sections. The model is based upon the concepts and equations underpinning the mccabe. Review and extension of the mccabethiele method covering multiple feeds, products and heat transfer stages a. Mccabethiele method gui for binary column distillation. Plotting mccabethiele diagrams in microsoft excel for non. Review of binary distillation mccabethiele by computer part 2 twofeed distillation charles r. I want to design for 10% ethanol concentration in the feed which would give may be 9095% ethanol after two steps of. Mccabethiele method article about mccabethiele method by.
Unit operations of chemical engineering, 5th ed, mccabe and smith 0070448442. This application also highlights several maple concepts. Jul 10, 2009 the wolfram demonstrations project contains thousands of free interactive visualizations, with new entries added daily. As this is to be treated as a binary system, the mccabethiele method can be used to determine the number of theoretical stages.
Multiple feeds total condenser feed 1 overhead vapor boilup distillation column multiple feeds reflux drum bottoms partial reboiler reflux distillate feed 2 the mccabethiele method for cascades can be applied to systems with more thantwo sections. Results can be scaled to actual reflux ratio, typically r 1. Mccabe thiele method developed in 1925 suitable for binary mixtures in continuous columns can be used as a preliminary study for multi component combination of vle data and operating lines assumes. This implies constant molar ow rates of both apvor and liquid leaving every stage. The original structured testing document nbs99 discusses cyclomatic complexity and the basic testing technique. Mccabethiele diagram article about mccabethiele diagram. Visualizing the mccabethiele diagram semantic scholar. No matter the situation, i need the mccabe thiele diagram in order to use the ponchonsavarit method. Dew point, boiling point and actual temperature of the feed if the feed is subcooled or superheated. The success of this method depends upon the difference in solubility of a compound in. 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.
Distillation design for ethanol water posted in student. Mccabethiele graphical method for a nonideal binary mixture. Now the ponchonsavarit method is hailed as being more accurate in the case of nonlinear operating lines. Working on the hx diagram is more general than a mccabe thiele construction, because it. Graphical method for calculation of the number of theoretical plates or contacting stages required for a given binary distillation operation explanation of mccabethiele method. The feed is a two phase mixture with a feed quality is equal to 0.
This demonstration presents the mccabe thiele graphical method applied to the waterethanol mixture. Mar 06, 2014 uses the mccabe thiele graphical method to determine the number of equilibrium stages in a distillation column. The options and paths available are detailed in section 2. Specific calculations are detailed in appendices c and. Description of construction methods and activities. The mccabethiele method is considered to be the simplest and perhaps most instructive.
The graphical mccabe thiele method can be used to determine the number of ideal stages and feed tray location. The mixture is ethanol and water and i need to use mccabe thiele method. No matter the situation, i need the mccabethiele diagram in order to use the ponchonsavarit method. The wolfram demonstrations project contains thousands of free interactive visualizations, with new entries added daily. To do this, you make a plot showing the equilibrium curve, feed line, and operating lines for the rectifying and stripping sections all on the same axes, and then find answers by graphical construction. First, the rectifying cyan and stripping magenta operating lines are plotted using a reflux ratio equal to 1.
In this section we describe the mccabe thiele method step by step, however prior to starting several pieces of information are required. This chapter describes how to build a mccabethiele diagram showing how many stages are required to achieve our separation defined by. Rather than a grid of pixels, they are code instructions interpreted by the browser on the fly. Graphical method for calculation of the number of theoretical plates or contacting stages required for a given binary distillation operation explanation of mccabe thiele method. This application calculates the required number of theoretical stages for a set of specified operating parameters via the mccabe thiele method. 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. Mccabethiele graphical method example part 1 youtube.
Apr 19, 2015 now the ponchonsavarit method is hailed as being more accurate in the case of nonlinear operating lines. In that case, i still need the operating lines on my xy plot in order to draw a line from my maroon dot to my dark blue dot. One quick method of estimation for number of plates and feed stage can be obtained from the graphical mccabe thiele method from the. Hi, i have calculated the number of theoretical stages for a distillation column that fractionate 3000kgh of an acetonebenzene solution containing 0. Excel spreadsheets are increasingly used in chemical engineering education and industrial practice 5. Ponchon savarit method pdf this approach is sometimes called the ponchonsavarit method. However, these were limited to cases of constant relative volatility, which applies only to highly ideal systems. A free powerpoint ppt presentation displayed as a flash slide show on id.
This demonstration presents the mccabe and thiele graphical method, which is applicable to binary mixtures. Jul 25, 2007 the feed is a two phase mixture with a feed quality is equal to 0. The mccabethiele method is a classical approximate graphical method for the conceptual design of binary distillation columns which is still widely used, mainly. First, the rectifying and stripping operating lines are plotted using a reflux ratio equal to 1. Mccabethiele method for an ideal binary mixture file. The stage efficiency can be estimated using van winkles correlation or the aicheme method.
The mccabethiele method applied to single section contactors. Pdf a graphic mccabethiele method is developed for application to fully reactive column configuration. A list of citizendium articles, and planned articles, about mccabe thiele method. Plotting mccabethiele diagrams in microsoft excel for. Ppt distillation powerpoint presentation free to download. Review of binary distillation mccabethiele by computer. 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 mccabethiele diagram in microsoft excel. This chapter describes how to build a mccabe thiele diagram showing how many stages are required to achieve our separation defined by. The mccabe thiele method is a graphical procedure to solve alternately the equilibrium relation and the material. The mccabethiele method is considered to be the simplest and perhaps most instructive method for the analysis of binary distillation. One of the simplest methods that was introduced for determining the number of stages and feed location was the mccabethiele method. Mccabethiele diagram as we can see from the figures below 1, the separation factor affects the number of stages necessary to obtain a desired separation. Review of the literature indicated that interactive graphic packages were developed for the application of the mccabethiele method in the design of binary distillation columns, e. The challenge with svgs is they are not like other graphic files.
It is desired to produce a distillate containing 0. Relative volatility is 5 reflux ratio mccabethiele method allows full control over reboiler duty, and it is not uncommon to first solve a problem assuming minimum reflux ratio. 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. See also changes related to mccabe thiele method, or pages that link to mccabe thiele method or to this page or whose text contains mccabe thiele method. It a paper design so i need to assume all the parameters. Mccabethiele method revisitedsolving binary distillation problems with nonconventional specifications article pdf available in journal of chemical engineering of japan 419.
Koppany, retired chemical engineer 2009 in our first paper we presented a basic computer program for performing the mccabethiele 1 theoretical stage stepoff procedure for a single feed two product binary distillation column. It can be seen that we have loaded the binary interaction parameters from the library that comes with chemsep. Reyeslabarta abstract the mccabethiele method is a classical approximate graphical method for the conceptual design of binary distillation columns which is still widely used, mainly for. We draw the mccabe and thiele diagram and get the number of theoretical plates equal to 9. Visualizing the mccabethiele diagram reactions and. This article demonstrates how excel may be used for chemical engineering computation and visualization. What links here related changes upload file special pages permanent link page. Constant molaloverflow no heat loss from column not suitable if. Graphical method for calculation of the number of theoretical plates or contacting stages required for a given binary distillation operation explanation of mccabe thiele diagram. Review and extension of the mccabethiele method covering. Step 2 add nonnegative artificial variable to the left side of each of the equations corresponding to the constraints of the type. Distillation the mccabe thiele graphical design method gavin duffy school of electrical engineering systems dit kevin st learning outcomes total reflux all vapour is. Computeraided graphics in distillation columns design.
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. Unit operations of chemical engineering, 5th ed, mccabe. 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. It plots the classic mccabethiele diagram and evaluates the minimum and actual reflux ratio, and the thermodynamic state of the feed. Vapourliquid equilibrium data for the feed components. Visualizing the mccabethiele diagram m ore than 80 years ago, mccabe and thiele developed a creative graphical solution technique based on lewiss assumption of constant molal over fl ow cmo for the rational design of distillation columns 1. Mccabetheile 2 construction lines for mccabethiele method equilibrium curve 45 line xz f x b y y b y n stripping section. Svg is an xmlbased method for instructing the browser to draw scalable vector graphics based on defined shapes and coordinates. Aug 15, 2010 my first attempt at making a mccabe thiele program. Graphical method for calculation of the number of theoretical plates or contacting stages required for a given binary distillation operation explanation of mccabethiele diagram. 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. The mccabethiele method is a classical approximate graphical method for the conceptual design of. This document gives an expanded and updated presentation of those topics.
454 969 322 782 191 572 1554 16 413 1363 104 79 922 1567 575 1150 13 984 590 1126 391 831 1131 430 843 1312 1229 320 923 281 256 1155 882 1470 122 1600 218 1019 915 1455 1129 781 296