i am solving the question attached as a picture. one of the requirements are as follows:
Set up DesignSpecs within the column so that there is:
99.95 wt% methanol in the distillate
99.90 wt% water in the bottom
Vary the distillate rate (800-1700 lbmol/hr)
i guess the reflux ratio is put as an input parameter to fix it, as if both the distillate and bottoms purity were put as input parameter, the reflux ratio will vary, correct me if l am wrong. l agree with specifying the bottoms purity, not sure what the author was thinking, maybe your experience may help me. the question is obtained from
https://allaboutchem.files.wordpress.co ... adfrac.ppt. thanks