Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.15372/CSD2022411

Ключевые слова: coal, carbonization, sorbents, specific surface area, pore volume, potassium hydroxide

Аннотация: Carbon sorbents were obtained at different ratios of coal/alkali from coals of the Kaa-Khem, the Mezhegey and the Elegest deposits. It is established that the necessary mass ratio of coal/alkali for these coal samples at the activation stage is 1 : 3 or 1 : 4. The excess alkali concentration worsens textural characteristics. It is shown by means of IR spectroscopy and thermogravimetry that alkaline treatment causes chemical changes in the molecular structure: the content of oxygen-containing fragments increases, the amount of carbon in aromatic structures decreases, which causes a decrease in caking capacity. The revealed features include a significant decrease in the final temperature and narrowing of the interval of the main decomposition of the coal organic mass, changes in the mass loss curves within the temperature range of 500-750 °C, corresponding to the zone of decomposition of the aromatic structures in coal. Physicochemical regularities of material formation and optimal conditions providing the production of sorbents with high texture characteristics from sintering coals were determined. On the basis of the studies of adsorption characteristics of the samples (for iodine and methylene blue), it is concluded that it is reasonable to use the obtained carbon sorbents for the purification of industrial wastewater from organic pollutants (phenol, pyridine, <i>etc</i> .).

Журнал: Chemistry for Sustainable Development

Выпуск журнала: Т. 30, № 5

Номера страниц: 513-521

ISSN журнала: 18171818

Место издания: Novosibirsk

Издатель: Федеральный исследовательский центр угля и углехимии СО РАН, Институт химии твердого тела и механохимии СО РАН, Институт катализа им. Г.К. Борескова СО РАН, Сибирское отделение РАН, Новосибирский институт органической химии им. Н.Н. Ворожцова СО РАН

• MONGUSH G. R. (Tuvinian Institute for Exploration of Natural Resources, Siberian Branch of the Russian Academy of Sciences)
• BARANOVA M. P. (Krasnoyarsk Agrarian University)
• SAPELKINA T. V. (Tuvinian Institute for Exploration of Natural Resources, Siberian Branch of the Russian Academy of Sciences)

• РИНЦ (eLIBRARY.RU)