HW 3 - p 4.68 - Adsorption of Propane and Propylene on Silica Gel - 4 pts
A gas containing 50 mol% propylene in propane is to be separated with silica gel having the equilibrium properties shown in Figure 4.30. The final products are to be 90 mol% propylene and75 mol% propane. If 1,000 lb of silica gel/lbmol of feed gas or less is used, can the desired separation be made in one equilibrium stage? If not, what separation can be achieved?
posted by Dr. B at 2:26 PM
6 Comments:
Your hints seem to be the same as 4.64, as 4.68 deals with propylene and propane. Can you update this to have the correct this?
the book says that "the products are to be 90% propylene and 75% propane" but doesnt specify which is which. Is the 90% propylene the gas, and the 75% the solid (absorbate)?
id rater... and wheelie:
I wrote a new problem statement for this problem because the one in the book is very confusing. I did not realize how rough this problem statement was. Please see the HW page on the course website. I also added some hints, although I think the new problem is pretty straightforward.
Thank you for catching this issue early.
It might save you some time to know that units of mmole/g adsorbent on the y-axis in Fig 4.30b are equivalent to lbmole/1000 lbm adsorbent.
I can't download the gragh fig.4.30 and the powerpoint for class#9.
a 12:17 PM:
Oops. Try it now. Or just use the figure in your textbook. Mine is just bigger and you can write on it and turn it in. Sorry about that !
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