shubham jain _ 12695

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CHE 453A LAB REPORT I by SHUBHAM JAIN, Roll No. 12695, Monday Batch The requisite flow sheet (shown below), with the input conditions and other data like pump power etc., was made. The stream details, Condenser Pressure, Reboiler Pressure, etc. for both the Distillation Columns in the flow sheet were entered into separate Short-Cut Distillation Columns (shown below) in order to calculate the number of stages and the optimum feed stage for these Distillation Columns. Both the Distillation Columns in the flow sheet had 2 degrees of freedom. For the right hand side Distillation Column in the flow sheet, the 2 degrees of freedom were chosen as "mole fraction of Toluene in distillate" and "mole fraction of Xylene in bottoms", and both were specified to be 0.999, as given in the problem statement. For the left hand side Distillation Column in the flow sheet, the 2 degrees of freedom were chosen as "mole fraction of Benzene in distillate" and "mole fraction of Benzene in bottoms".

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CHE 453A LAB REPORT I by SHUBHAM JAIN, Roll No. 12695, Monday Batch The requisite flow sheet (shown below), with the input conditions and other data like pump power etc., was made. The stream details, Condenser Pressure, Reboiler Pressure, etc. for both the Distillation Columns in the flow sheet were entered into separate Short-Cut Distillation Columns (shown below) in order to calculate the number of stages and the optimum feed stage for these Distillation Columns. Both the Distillation Columns in the flow sheet had 2 degrees of freedom. For the right hand side Distillation Column in the flow sheet, the 2 degrees of freedom were chosen as "mole fraction of Toluene in distillate" and "mole fraction of Xylene in bottoms", and both were specified to be 0.999, as given in the problem statement. For the left hand side Distillation Column in the flow sheet, the 2 degrees of freedom were chosen as "mole fraction of Benzene in distillate" and "mole fraction of Benzene in bottoms". However, for the left hand side Distillation Column, only the "mole fraction of Benzene in distillate" was specified to be 0.999 as per the problem statement, whereas the other degree of freedom i.e. "mole fraction of Benzene in bottoms", was manipulated in order to optimize the distillation train. Optimization : The "total reboiler duty" for the 2 Distillation Columns inthe flow sheet was recorded as a function of the "mole fraction of Benzene in bottoms" for the left hand side Distillation Column, which was manipulated in order to minimize the "total reboiler duty". Final Answer : The optimal "mole fraction of Benzene in bottoms" for the left hand side Distillation Column was found to be 0.015% (shown below).