TY CONF TI ACTIVATION OF CARBON IN AN ENEGRY-SAVING WAY KW carbon activation KW superheated steam KW activation zone KW first cooling zone JO Ecological and resource-saving technologies in science and technology AU Hayrullin, I.F. PY 2022 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov