Education of the republic of uzbekistan tashkent state technical university named after islam karimov

Chemistry and chemical technology 
63 
MATERIAL AND METHODS.
1.
The activated carbon production process takes place in two stages, if you do not take 
into account such stages as drying and crushing (classification):
2.
Pyrolysis of the feedstock at a temperature of 400 - 600 °C. As a result, carbonization is 
obtained, which is well known to us as charcoal for barbecues.
3. High temperature treatment of 800 - 1000 °C carbonization using water vapor or various 
mixtures of liquids. The result is activated carbon – one of the best adsorbents. 
The pellets were de-volatilized in a single-zone activation furnace at a temperature 
determined using C for all samples), in an atmosphere of thermo gravimetric analysis (800 
carbon dioxide, the consumption of which was 200 l/h.The refined de-volatilization parameters 
for each sample are presented. Activation of granules. The activation of the granules was carried 
out in an activation furnace at a temperature determined on the basis of thermo gravimetric
0
C for 
all samples, in an atmosphere of water vapor analysis and equal to 900 (steam consumption was 
600 l/h at all activation stages) to the degree of burnout of 45-50%.
The sorption properties of activated carbons largely depend on the nature of their porous 
structure. Therefore, specific surface area and porosity are extremely important characteristics of 
sorbents, and much attention is paid to their study
.
 
The porosity of the obtained AG-3 samples was determined using the NOVA-1200e 
automatic high-speed porous structure analyzer. The results of the analysis of the porous 
structure of the obtained granules are given. 
By the nature of the porous structure, all the obtained coals are microporous, but their 
micropore sizes are large (from 0.677 to 0.839 nm), which is indicated by a small value of the 
characteristic adsorption energy (from 15.488 to 19.199 kJ/mol). The volume of mesopores is 
very small (from 0.0324 to 0.0894 cm
3
/g). 
AG-3 grade activated carbon is universal for adsorption of various organic compounds from 
liquid and gas media. The mechanical strength of coal allows the use of large-volume structures, 
thereby ensuring a long service life.Activated carbon of this brand can be subjected to thermal 
regeneration with a high degree of restoration of the original properties with a small loss of mass. 
Appearance cylindrical granules of dark gray and black color with a size of 1.5-2.8 mm. 
Activated carbon AG-3 contains a huge amount of mesopores (from 2 to 50 nm), therefore it is 
suitable for adsorption of larger organic molecules. Ithas a highsorptioncapacity.