4.3. Case study of process design
In order to assess the feasibility of the internal reflux process on
large scale, a case study was investigated with the following process
specifications: raffinate mass fraction of heavy compounds (EEC20
+ EE-C22) equal to 95% and recovery of the same compounds in
the raffinate of 95%. As discussed in the previous sections, the temperature
of the body of the column in the internal reflux process
should not be fixed above 50 ◦C, in order to avoid high temperatures
at the top stage. In addition, the analysis carried out on
columns with 5 theoretical stages showed that very good results
can be obtained with T = 50 ◦C, pressures in the range (12–14) MPa,
and S/F values in the range 60–120. S/F values in this range are
in line with typical values employed in the fractionation of liquid
mixtures with SCCO2 and they are typically considered reasonable
for process economics when dealing with supercritical fluid
fractionation
4.3. Case study of process designIn order to assess the feasibility of the internal reflux process onlarge scale, a case study was investigated with the following processspecifications: raffinate mass fraction of heavy compounds (EEC20+ EE-C22) equal to 95% and recovery of the same compounds inthe raffinate of 95%. As discussed in the previous sections, the temperatureof the body of the column in the internal reflux processshould not be fixed above 50 ◦C, in order to avoid high temperaturesat the top stage. In addition, the analysis carried out oncolumns with 5 theoretical stages showed that very good resultscan be obtained with T = 50 ◦C, pressures in the range (12–14) MPa,and S/F values in the range 60–120. S/F values in this range arein line with typical values employed in the fractionation of liquidmixtures with SCCO2 and they are typically considered reasonablefor process economics when dealing with supercritical fluidfractionation
การแปล กรุณารอสักครู่..