H 3Qi

Example 3.2 Calculate the minimum reflux for the depropanizer in Example 2.4 using Underwood's method.

solution Since the feed is 66 percent vapor, 1 - q = 0.66.

To obtain relative volatilities, use the heavy key as reference such that aHK = 1.0. For all other components j , KJKkk.

solution Since the feed is 66 percent vapor, 1 - q = 0.66.

To obtain relative volatilities, use the heavy key as reference such that aHK = 1.0. For all other components j , KJKkk.

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