Why McCabe Thiele method is used?

Why McCabe Thiele method is used?

Another very common application of this method occurs when the recovery ratio of one of the components, the specification of bottom or top composition, and the reflux ratio are given. That is, traditionally the McCabe- Thiele method is used just to determine the number of stages to achieve a specified separation.

How do you draw the equilibrium curve in McCabe Thiele?

Target product quality (composition) of the top and bottom products.

  1. Step 1: Establish the Plot.
  2. Step 2: Add 45 Degree line.
  3. Step 3: Add Equilibrium Data.
  4. Step 4: Choose Product Compositions.
  5. Step 5: Add the Feed Condition Line.
  6. Step 6: The Rectifying Section.
  7. Step 7: The Stripping Section.
  8. Step 8: Stepping Down the Plot.

What is the main disadvantage of the McCabe Thiele method?

One of the main disadvantages of the McCabe-Thiele Method is that it is not very useful for analyzing the distillation of mixtures containing more than 2 components. However, the method is still useful as a teaching tool and a conceptual tool.

Which of the following is explained by using McCabe-Thiele plot?

Which of the following is explained by using McCabe-Thiele plot? Clarification: The McCabe-Thiele plot is a basic tool to assist distillation. It is a method to calculate the number of theoretical trays required for the distillation process of a binary mixture.

Which of the following is not applicable for McCabe-Thiele method?

Explanation: The best assumption of the McCabe Method is it is based on Constant molar overflow, while heat duties are neglected in the method.

How do you find the minimum reflux ratio from McCabe-Thiele?

Minimum Reflux Ratio (Rm) Draw a line from ( xD, yD) passing through ( x1, y1) with an intercept xD / (Rm + 1) on Y axis. Reflux ratio is calculated as 1.5 times the minimum reflux ratio.

Is McCabe-Thiele accurate?

Then, part 2 of this exercise, consists in determining the ratio of rectifying to stripping stages regarding the same mixture and operational conditions, using the Fenske equation, the Kirkbridge equa- tion and the McCabe and Thiele method. In this particular example, the McCabe and Thiele method is the most accurate.

What is Q line in distillation?

The q-line is that drawn between the intersection of the operating lines, and where the feed composition lies on the diagonal line. Depending on the state of the feed, the feed lines will have different slopes. For example, q = 0 (saturated vapour) q = 1 (saturated liquid)

What is the Q line in distillation?

What is the minimum reflux ratio?

The Minimum Reflux Ratio (R min) is the lowest value of reflux at which separation can be achieved even with an infinite number of plates. It is possible to achieve a separation at any reflux ratio above the minimum reflux ratio. As the reflux ratio increases, the number of theoretical plates required decreases.

What is weeping in distillation column?

What is Weeping of Distillation Column? If a very small fraction of the liquid flows from a tray to the lower one through perforation or openings of the tray deck, the phenomenon is called ‘weeping’.