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Information × Registration Number 0224U000258, 0121U114248 , R & D reports Title New approaches to carbon adsorbents synthesis by thermochemolysis of raw coals with potassium hydroxide, hydrogen peroxide, and Bronsted’s acids anions. popup.stage_title Head Kucherenko Volodymyr O., Доктор хімічних наук Registration Date 04-01-2024 Organization Institute of Physical and Organic Chemistry and Coal Chemistry. LM Litvinenko of the National Academy of Sciences of Ukraine popup.description2  The object of the study is the adsorption properties of carbon materials (CMs) obtained by thermochemolysis of coals with hydrogen peroxide and nitric acid. The purpose of the work is to evaluate the influence of thermohemolysis conditions on the adsorption capacity of CMs in relation to 4-chlorophenol, Pb(II) and Cu(II) cations. Research methods: elemental analysis, X-ray diffraction, IR and UV spectroscopy, titrimetry, adsorption measurements. The adsorption properties of new CMs from fossil coal in relation to ecotoxicants 4-chlorophenol, Pb(II) and Cu(II) cations were investigated. The "reagent/coal carbon" ratio was established to be a key factor determining the depth of structural reorganization and adsorption activity of CMs. Adsorption kinetics (25°C) obeys the pseudo-second-order model and is limited by the interaction of the adsorbate with surface active centers. Adsorption isotherms are best approximated by the Langmuir and Freundlich models. An increase in coal rank was found to reduce the thermochemolysis efficiency expressing by the adsorption capacity of CMs. The combination of anthracite intercalation under thermochemolysis (HNO3, 140°C) with thermal shock forms CMs with three times higher reactivity during steam activation (850°C) than that of heat-treated anthracite. The intercalation effect on the activation of anthracite is manifested in an increase in the gasification rate (by 3 times), the achievement of a larger (by 1.5 times) specific surface area and a significant increase (by 4.5-10 times) in the rate of its formation. Product Description popup.authors Efimova Irina V. Bovan Lubov A. Velychko Oksana O. Volkova Larysa K. Kravchenko Viktor V. Kravchenko Galyna G. Redko Anasnasiya V. Sabierova Viktoriia O. Sydorenko Irіna G. Smolyar Olena F. Tamarkina Yuliya V. Frolova Irina B. Шендрік Тетяна G. popup.nrat_date 2024-01-04 Close