Evaluation usability of water adsorption and rectification in dehydration of bioethanol
2010
Bremers, G., Latvia Univ. of Agriculture, Jelgava (Latvia) | Birzietis, G., Latvia Univ. of Agriculture, Jelgava (Latvia) | Blija, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Skele, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Rucins, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Danilevics, A., University of Latvia, Riga (Latvia)
At the moment the combined method – mash distillate rectification with following water adsorption by molecular sieves – is the most widely used method in bioethanol dehydration. We have estimated the energy consumption of the both water removal processes and come to the conclusion that in case of alcohol concentrations up to 90 percent rectification is more advantageous, but above this concentration – water adsorption. Combining of these processes and performing them simultaneously is even more beneficial. Then, by adding water adsorption to rectification, it is possible to gain 60 to 80 percent energy saving. These studies allow us to propose a new bioethanol dehydration technology, which we named as congruent dehydration of bioethanol.
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