|Ultima descărcare din IBN:|
| SM ISO690:2012|
COVALIOV, Victor; COVALIOVA, Olga; BOBEICA, Valentin. The role of triterpene compounds in stimulation of the selective biochemical hydrogen production. In: Achievements and perspectives of modern chemistry. 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 167. ISBN 978-9975-62-428-2.
|Achievements and perspectives of modern chemistry 2019|
Conferința "International Conference "Achievements and perspectives of modern chemistry"" |
Chişinău, Moldova, 9-11 octombrie 2019
Production and using of hydrogen in the various fields of power engineering and technology is a priority area, due to its high energetic indexes and environmentally friendly applications leading in many cases to water formation. Among the numerous hydrogen production technologies biochemical processes are considered asrather efficient and cheap. A new biohydrogen production method from biomass has been proposed, through the anaerobic digestion of municipal and agricultural wastes with high organics contents . Thevinasseasawastefromwinematerialsandalcoholdistillationwas used as biomass, to which the digestion stimulating additives were added – isoprenoid bioactive substances (BAS) of vegetable origin, in the amount of 1*10-3 ± 5*10-4 mass.%. The digestion process is carried out under the mesophyl conditions at pH = 5.2 -7.5 and at the temperature 33±2oC, with biomass agitation and permanent hydrogen removal from the bioreactor. Triterpene compounds were used as BAS, extracted with water-alcohol mixture, specifically: gypsogenin, gypsogenin glycosides or neotigenin saponin – steroide of C27-spirostane series:Their effect on the bacteria’s vitalactivity may beconnected with the electrons biochemical transfer from water molecules on protons and consequent emission of the molecular hydrogen. One of the main biochemical reactions (theso-called water-gas shift reaction) is the conversion of carbon monoxide (CO) forming with water molecules carbondioxide and hydrogen: CO + H2O – CO2+H2, used by the bacteria for the additional energy obtaining. CO and H2 formation at the primary stages of biomass digestion was confirmed by chromatographic studies. To carry out this process, amodified bioreactor design has been proposed .