10% ethanol solution is equivalent to 50 bar osmotic pressure. So you would need a very high pressure to concentrate 10% ethanol and overcome its osmotic pressure. Typical RO systems work/are calibrated for up to 50 bar pressure. Furthermore, after concentration of about 3% even the tightest RO passes half of the ethanol through, so the losses will be high.
Can ethanol be purified by reverse osmosis?
10% ethanol solution is equivalent to 50 bar osmotic pressure. So you would need a very high pressure to concentrate 10% ethanol and overcome its osmotic pressure. Typical RO systems work/are calibrated for up to 50 bar pressure.
Furthermore, after concentration of about 3% even the tightest RO passes half of the ethanol through, so the losses will be high.