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Information × Registration Number 0225U000727, (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 Термохемоліз довгополуменевого вугілля з гідроксидом калію Head Kucherenko Volodymyr O., Доктор хімічних наук Registration Date 17-01-2025 Organization Institute of Physical and Organic Chemistry and Coal Chemistry. LM Litvinenko of the National Academy of Sciences of Ukraine popup.description1 To substantiate new approaches to synthesis of carbon adsorbents for organic ecotoxicants and heavy metals capture from aquieous media. It is supposed to base at statement of dependences of structure and adsorption capacities of raw coal thermochemolysis products on process conditions. popup.description2 The object of the study is the structure and adsorption properties of carbon materials (CMs) obtained by alkaline thermochemolysis of long-flame coal at low KOH/coal ratio. The aim of the work is to evaluate the effect of thermohemolysis temperature on the structure and adsorption capacity of CMs towards phenolic compounds, methylene blue (MB) dye, iodine, and Pb(II) cations in aqueous media. Research methods: elemental analysis, X-ray diffraction, IR and UV spectroscopy, titrimetry, adsorption measurements. Alkaline thermohemolysis (≤825°C) was established to transform coal into CM with a specific surface areaup to 1530 m2/g, which consists of 93% of the micropore surface. Temperature dependences of the elemental composition, supramolecular properties and porous structure characteristics of new CMs were obtained. It was found that the surface of ultramicropores is maximum for CMs obtained at 600°C, and its decrease is compensated by an increase in the surface of supermicropores. The portion of the micropore surface is 93–97%. The adsorption activity of new CMs with respect to Pb(II), MB, phenol, 4-chlorophenol and iodine was investigated. The adsorption kinetics obeysis to a pseudo-second-order model. The rate-determining stage is the interaction of the adsorbate with surface centers. The adsorption isotherms are described by the Langmuir and Freundlich models. The temperature dependences of adsorption capacities were established. The adsorption contributions of ion exchange reactions, interaction with the π-system of polyarenes (π-sorption), and volumetric filling of mesopores were estimated. Product Description popup.authors Yefimova Iryna V. Bovan Liubov A. Volkova Larysa K. Kravchenko Viktor V. Kravchenko Halyna H. Redko Anastasiia V. Sabierova Viktoriia O. Sydorenko Iryna H. Smoliar Olena F. Tamarkina Yuliia V. Frolova Iryna B. Shendrik Tetiana H. popup.nrat_date 2025-01-17 Close