Home – Home – Jornals – Chemistry for Sustainable Development 2019 number 6

The texture characteristics of carbon sorbents obtained from coal of five different grades from Kuzbass were studied. The sorbents were prepared through alkaline activation using potassium hydroxide. The alkali-coal mixture was homogenized by mechanical mixing at the KOH/coal mass ratio of 1 : 1. It was shown that the sorbents prepared from coal activated with KOH have a developed porous structure and pronounced microporosity. The structure of micropores is practically independent of coal grade. The contribution from mesopores into the porosity of the sorbents is insignificant and is observed only for fat coal. It was established that the specific surface and pore volume of the sorbents increase with a decrease in the degree of coal metamorphism. The sorbent prepared from subbituminous coal has the highest textural characteristics: its specific surface area is 1340 m²/g, pore volume 0.58 cm³/g. The minimal values are characteristic of lean coal: 780 m²/g and 0.33 cm³/g, respectively.