Abstract

The authors analyzed the scientific literature on the existing methods of dehydration of water-alcohol solutions with a view to their future use as fuel ethanol, and presented examples of requirements for the bioethanol composition of the world standards. The paper demonstrates using dehydrated ethanol as a gasoline additive to the advantage of the environment. For the first time the distillate of fermentation mixture as a source of dehydrated ethanol is proposed. The authors studied the process of dehydrating distillate of fermentation mixture by natural mineral zeolite - mordenite, and proposed a two-stage method of absorbing water from the vapor by adsorbent. The paper demonstrates that major groups of impurities in alcohol are absorbed by mordenite in parallel with water sorption.The authors designed the apparatus technological scheme of the stepwise dehydration of the fermentation mixture distillate, which allows to obtain not only ethyl alcohol with concentration of 99.8 % wt (weight percents), but also industrial alcohol of «B» category. In the paper the authors described principles of the plant operation and proposed methods for regenerating mordenite when producing fuel ethanol and industrial alcohol of «B» category. The paper also makes assumption of probability to use other zeolites for absorbing water from water-alcohol solutions.

Keywords

Fuel, stepwise dehydration, water-alcohol solutions, mordenite, the distillate of fermentation mixture

REFERENCES

1. Akumov, N.I. Ispol'zovanie spirtobenzinovoy smesi v kachestve motornogo topliva / N.I. Akumov, V.F. Yudaev // Proizvodstvo spirta i likerovodochnyh izdeliy. - 2004. - № 4. - S. 31.
2. Lavrov, E. Toplivo buduschego / E. Lavrov // Pischevaya i pererabatyvayuschaya promyshlennost'. - 2004. - № 12. - S. 4-6.
3. Larchenko, K.A. Bioetanol kak al'ternativnyy vozobnovlyaemyy istochnik energii / K.A. Larchenko, B.V. Morgun // Biotehnologiya. - 2008. - T. 1, № 4. - S. 18-28.
4. Cygankov, S.P. Bioetanol / S.P. Cygankov. - Kiev, 2010. - 160 s.
5. Mank, V.V. Obezvozhivanie vodno-spirtovyh rastvorov ceolitami / V.V. Mank, L.N. Mel'nik, N.A. Stecenko// Ukrainskiy himicheskiy zhurnal. - 2004. - T. 70, № 12. - S. 91-94.
6. Pat. Ukrainy 77814 MPK S07S 7/13. Ustanovka dlya proizvodstva spirta etilovogo tehnicheskogo i toplivnogo etanola / Kornienko V.V., Mel'nik L.M., Taran V.M.; zayavitel' i vladelec patenta Nacional'nyy universitet pischevyh tehnologiy. - Izd. 25.02.13, Byul. № 4.