Abstract
The activation of carbon sorbents in CO2 is investigated. The sorbents are produced by the thermolysis of naturally oxidized SS coal steeped in potassium hydroxide, with an alkali/coal ratio R KOH = 0.01 and 0.05 g/g. The influence of CO2 activation on the texture of the sorbents obtained is established. After 10-min activation, the increase in specific surface area of the sorbents is a maximum (about 100%). Longer activation increases the loss of material. The pore volume formed on activation is proportional to the proportion of carbon-bearing material removed. The volume of adsorbing pores formed in the sorbents is greatest when the loss of material is 25–35%.
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Original Russian Text © T.S. Nechaeva, N.I. Fedorova, Z.R. Ismagilov, 2017, published in Koks i Khimiya, 2017, No. 6, pp. 25–29.
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Nechaeva, T.S., Fedorova, N.I. & Ismagilov, Z.R. Influence of activation on the pore structure of adsorbents obtained from coal–alkali mixtures. Coke Chem. 60, 239–242 (2017). https://doi.org/10.3103/S1068364X17060072
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DOI: https://doi.org/10.3103/S1068364X17060072