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Information × Registration Number 0221U106657, 0121U110867 , R & D reports Title Conversion of biofeedstock materials on zeolite-containing catalysts - a way to obtain heterocyclic compounds as perspective components of a new generation of fuels popup.stage_title Head Patryliak Liubov K., д.х.н. Registration Date 16-12-2021 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description2  Catalysts based on industrial zeolites (X, Y, M, ZSM-5), which combine Bronsted and Lewis acidity. The acidity of catalysts by means of sorption of ammonia and pyridine was studied, IR spectral studies were performed, and texture characteristics were established. When dehydrating glucose solutions (10-20% wt.) in water, the yield of 5-HMF was 10-15%, while in DMSO - 40-50%. It was found that as the temperature load of the sample decreases in the course of synthesis, the yields and selectivity for 5-HMF increase. Yields, selectivity and conversion correlate with the number of medium strength acid sites in the samples. Carbon-containing deposits were found to be formed when working in water, while DMSO protects the catalyst surface from humic deposits. A hypothetical structure of humic compounds is proposed based on NMR and IR spectroscopic analysis. Based on natural zeolites of Transcarpathia acid and bifunctional zeolite catalysts were synthesized. The samples were modified by using steaming at 200 and 250 oC, as well as dealumination with hydrochloric acid and EDTA. It was found that the first improves only microporosity, and the second one increases both micro- and mesoporosity. Natural based samples showed a yield of 5-HMF up to 50 and 83 % in the conversion of fructose. A method for the synthesis of micro-mesoporous zeolite-containing catalysts based on kaolin has been developed. The latter consists of the stages of formation of kaolin to the microsphere, thermal transformation of kaolinite, formation of granules, hydrothermal synthesis of zeolite in an alkaline medium and modification of the zeolite phase with the formation of acid sites. It was found that the yield of 5-HMF and light products increases symbatic with increasing content of medium-strength acid sites in the samples. Comparable to synthetic zeolites yields of 5-HMF (40-45%) were achieved over kaolin-based samples. Product Description popup.authors Voloshyna Yuliya G. Zubenko Stepan O. Коnovalov Sergiy V. Pertko Oleksandra P. Povazhnyi Volodymyr А. Yakovenko Angela V. popup.nrat_date 2021-12-16 Close