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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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D. Problems

*Answers to problems with an asterisk are at the back of the book.

D1.* For Examples 16-1 and 16-2, estimate an average HOG in the enriching section. Then calculate nOG and hE = HOG,avg nOG.

D2.* If 1-in metal Pall rings are used instead of 2-inch rings in Example 16-2:

a. Recalculate the flooding velocity and the required diameter.

b. Recalculate HG and HL in the enriching section.

D3. In part E of Example 16-2 a HETP value of 2.15 feet is calculated for the top of the enriching section. Since the average error in the individual mass transfer coefficients ky and kx can be ±24.4% (Wankat and Knaebel, 2008), calculate the range of HETP values at the top of the column (m = 0.63) and for a geometric average of m over the enriching section ...

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