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