Influence of activation on the pore structure of adsorbents obtained from coal–alkali mixtures

摘要

AbstractThe activation of carbon sorbents in CO2is investigated. The sorbents are produced by the thermolysis of naturally oxidized SS coal steeped in potassium hydroxide, with an alkali/coal ratioRKOH= 0.01 and 0.05 g/g. The influence of CO2activation 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%.]]>