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2. In a chemical processing plant, an evaporator is used to separate a mixture of n-pentane and benzene. The feed to the column consisted of 60 mol % of n-pentane and the remaining are benzene. In order to achieve high purity of n-pentane, a portion of the top product is returned to the feed. The flowrate ratio of recycle stream to the feed is expected to be 0.1 to 0.3. The feed temperature is in the range of 15°C to 20°C, whereas the temperature at top and bottom streams are 78°C to 88°C and 30°C to 35°C, respectively. Perform material and energy balance for the evaporator. All the material balances in each stream should be shown clearly. State all assumptions with justifications.

          2.
In a chemical processing plant, an evaporator is used to separate a mixture of
n-pentane and benzene. The feed to the column consisted of 60 mol % of
n-pentane and the remaining are benzene. In order to achieve high purity of
n-pentane, a portion of the top product is returned to the feed. The flowrate ratio
of recycle stream to the feed is expected to be 0.1 to 0.3. The feed temperature
is in the range of 15°C to 20°C, whereas the temperature at top and bottom
streams are 78°C to 88°C and 30°C to 35°C, respectively.
Perform material and energy balance for the evaporator. All the material
balances in each stream should be shown clearly. State all assumptions with
justifications.

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2.
In a chemical processing plant, an evaporator is used to separate a mixture of
n-pentane and benzene. The feed to the column consisted of 60 mol % of
n-pentane and the remaining are benzene. In order to achieve high purity of
n-pentane, a portion of the top product is returned to the feed. The flowrate ratio
of recycle stream to the feed is expected to be 0.1 to 0.3. The feed temperature
is in the range of 15°C to 20°C, whereas the temperature at top and bottom
streams are 78°C to 88°C and 30°C to 35°C, respectively.
Perform material and energy balance for the evaporator. All the material
balances in each stream should be shown clearly. State all assumptions with
justifications.

Added by Miriam S.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

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Solved by Expert Anna D.

Step 1

Material Balance: We need to determine the flow rates of the different streams in the evaporator. Let's assume that the feed flow rate is F (mol/h). Since the feed consists of 60 mol% n-pentane and the remaining is benzene, we can calculate the flow rates of Show more…

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This question is about material & energy balance in an evaporator as an operating unit. Please answer this question as soon as possible ðŸ™ðŸ». In a chemical processing plant, an evaporator is used to separate a mixture of n-pentane and benzene. The feed to the column consisted of 60 mol% of n-pentane and the remaining is benzene. In order to achieve high purity of n-pentane, a portion of the top product is returned to the feed. The flowrate ratio of the recycle stream to the feed is expected to be 0.1 to 0.3. The feed temperature is in the range of 15Â°C to 20Â°C, whereas the temperature at the top and bottom streams are 78Â°C to 88Â°C and 30Â°C to 35Â°C, respectively. Perform material and energy balance for the evaporator. All the material balances in each stream should be shown clearly. State all assumptions with justifications.

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