Authors: E.S. Mikhaylova, N.I. Fedorova, Z.R. Ismagilov

Title of the article: Low-temperature ozonation of carbon sorbent

Year: 2018, Issue: 5, Pages: 83-89

Branch of knowledge: Chemical technology

Index UDK: 66.094.3-926.214

DOI: 10.26730/1999-4125-2018-5-83-89

Abstract: Adsorption, ion-exchange and chemical properties of sorbents depend on the presence on their surface of various oxygen-containing functional groups, which are formed in the process of activation by oxidizers of various kinds. During the oxidation of the carbon surface, both the oxidative destruction of organic matter and the formation of surface oxygen compounds take place. In this paper, we present the results of a study of the change in texture and physicochemical properties of the surface of a carbon sorbent after oxidative modification by ozone. A carbon sorbent sample obtained on the basis of long-flame coal was used for the study. Modification of the surface of the carbon sorbent was carried out at different contact times with the ozone-oxygen mixture. Methods: low-temperature nitrogen adsorption, IR spectroscopy. Results: Ozonization of carbon sorbents is an effective method that allows to modify its structural characteristics. Oxidation with an ozone-oxygen mixture leads to an increase in the surface area, mainly due to the growth of micro- and mesopores. At the same time, according to IR spectroscopy, there is an increase in oxygen-containing groups on the surface of the sorbent.

Key words: sorbent ozonation оzone oxidation

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