Mccabe Thiele Diagram
Mccabe thiele method for methanol water separation neil hendren and rachael l.
Mccabe thiele diagram. The mccabe thiele 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 trouble shoot distillation and other cascaded processes. 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. Constant molaloverflow no heat loss from column not suitable if.
This article shows how to draw mccabe thiele diagram for doing binary distillation analysis in a spreadsheet. Relative volatility is 1 3 or 5 reflux ratio 1 1 rmin more than 25. Mccabe thiele method for methanol water separation this demonstration shows how to determine the number of equilibrium stages needed for a two component methanol water separation in a counter current distillation column.
The horizontal axis will be for the mole fraction denoted by x of the lower boiling feed component in the liquid phase. I introduce how to construct and analyze mccabe thiele diagrams to model binary distillation columns. 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.
Simpliﬁ ed methods such as mccabe thiele are rarely used today for detailed design. The spreadsheet also automatically draw the traditional mccabe thiele plot. It also shows the optimal location to feed the binary mixture into the column.
Determine total number of stages and feed stage for separation of a binary mixture with relative volatility α 2 5 feed composition z f 0 36 distillate composition x d 0 915 bottom composition x b 0 05 and feed quality q 1 5. Construct an x y diagram for an absorption column rachael l. Typical mccabe thiele diagram for distillation of a binary feed the first step is to draw equal sized vertical and horizontal axes of a graph.
This is a classic chemical engineering diagram and shows the number of theoretical stages the position and slope of the q line and the relative volatility curve and the purity of the top and bottom products. We ll learn how to determine compositions required num.
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