Hi All,
I´m trying to figure my local costs for ethanol to try some batches in BioD from waste oil. Ethanol 100% is quite expense, 95 % a bit less and 70% least costly. I have a supplier of 3A molecular sieve at about US $40 per kilogram. I was planning on starting with the 95% and running it through a column filled with about 250 grams of the 3A sieve. I generate my own electricity. Though it is a cost, I have some excess capacity. I also have a muffle furnace that can get at least to 550 C. The last time I worked with zeolites and molecular sieves I had access to nitrogen gas to pump through to regenerate the columns to remove bound water. I no longer have that nitrogen gas. Is it possible to regenerate the 3A mole sieve without a blanketing gas? I may be able to pump air through the column. Does my procedure seem right for removing the water from 95% ethanol? Would the same procedure work with the 70% ethanol?
Thanks,
Tom Irwin
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