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The structural features of carbon nanoporous materials (CM) were investigated by the low-temperature porometry method. Thuse, the CM has been obtained by thermal carbonization of plant biomass (walnut shells). The parameters of the CM samples were determined. In particular, the Neimark–Kiselev method was used to calculate the fractal dimension and estimate the surface inhomogeneity of the obtained CM samples by analyzing nitrogen adsorption isotherms. It was determined that, with an increase in the carbonization temperature of the raw material, the surface fractal dimension in the range from 1.68 to 2.56. The mineral composition was determined for СM samples using chemical elemental analysis.

Fractal characteristics of porous carbon materials obtained from walnut shells