Distillation column CONCLUSION
Based on the result we have obtained, by using distillation column we can determine the pressure drop of the distillation column for various boil-up rates, can observe the degree of forming on trays for each power increment and can determine the refractive index for unknown concentration of methylcyclohexane/toluene from the distillation column for each power increment. At 500 watt, the pressure drop in the distillation column is the lowest which is 76 mm H2O, while the pressure drop is highest at 1000 watt which is 249.1mm H 2O. For the power increment which are 750, 1250, and 1500 watt the pressure drops are 76, 135 and 110 mm H 2O respectively. The degree of forming for 500 watt is gentle, for 750 watt is vigorous. At 1000 watt power increment for the enriching part is flooding while for the top part is vigorous. The degree of forming for both 1250 watt and 1500 watt is gentle at the enriching and vigorous at the top. According to the graph plotted, the pressure drop is potentially proportional to the boil-up rate. According to the graph of percentage of toluene versus Refractive Index, the concentration of Toluene (mol%) at 500, 750, 1000, 1250, 1500 watt are 28. 22, 30, 42, 46 mol% respectively. For the value of refractive index without using the distillation column, the sample that contain higher mol% of toluene has higher refractive index value compare than the sample that contain lower mol% of toluene.
RECOMMENDATION
In this experiment, there are some recommendations that can be done in order to get the best results which are:
Make sure that during taking the pressure drop value, the position of eye is directly proportional to the meniscus of the manometer in order to avoid parallax error. Clean the refractometer surface using distilled water before using the apparatus in order to get the accurate reading of refratometer index. Takes three times the reading of refractometer of the solution and calculate the average of the readings so that the reading of refractometer is more accurate. Avoid direct contact with distillation column because it is hot, Use glove to hold the measuring cylinder during taking the volume of the methylcyclohexane. Avoid the solution from the fire because it is flammable.
Collect back all the sample of mixture after finishing the experiment because it can be reused.
REFERENCES
http://www.industrialgasplants.com/distillation-column.html
http://csd.newcastle.edu.au/simulations/dist_sim.html
http://www.consultexim.hu/katalogus/armfield/pdf/uop/uop3.pdf
http://www.armfield.co.uk/pdf_files/uop3.pdf
http://www.scribd.com/doc/12276923/Distillation
Working Guide to Process Equipment, McGrawhill 2nd edition, Norman p.Lieberman,Elizabeth t.Liberman
Unit Operation of Chemical Engineering, McGrawhill 7th edition, Warren L Mccabe,
Julian C.Smith, Peter Harriot.
http://en.wikipedia.org/wiki/Distillation_column
APPENDIX
