ИСТИНА

Backgrounds. Lignocellulose is a most abundant polysaccharide source on the Earth and it is a suitable renewable substrate for the fuel obtaining. Objectives. Membrane technologies allow to select and to concentrate the liquid fuels (alcohols) from the cultural broths of alcohol and acetone-butanol-ethanol (ABE)-fermentations with lignocellulose enzymatic digests as substrate. Methods. Lignocelluloses of hard and softwoods as well as grass and topinambur biomass were delignified by environmental-friendly ways, and then subjected to industrial cellulases treatments to obtain C6-sugar’s liquors. ABE and bioethanol fermentations were used to produce fuel alcohols which were further concentrated from the broth with membrane technique allowing to get 7-15-times concentrated alcohols with low energy inputs. Resulting concentrated alcohols were used as substrates in the catalytic process for hydrocarbons obtaining (C8-C10) – components of jet fuels: 2 ROH + H2 → R–R + 2 H2O, with up to 87% conversion rate. Viewed drawbacks, restrictions and challenges of the methods exploited will be discussed. Conclusions. New technology developed to obtain hydrocarbons for jet fuel mixtures manufactured from the renewable natural sources without much damage to the nature in environmentally friendly way without using the fossil resources. Acknowledgement: this study was supported by grant # 16-14-00098 of Russian Science Foundation.