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

Chemistry and chemical technology 
67 
[17]
Nagima Khudayberganova, Abdumalik Rizaev, and Eldor Abduraxmonov
 
Adsorption 
properties of benzene vapors on activated carbon from coke and asphalt
//
E3S Web of 
Conferences 264, 01022 (2021) 
[18]
Eshmetov, I.
, 
Salihanova, D.
, 
Agzamhodjaev, A.
 
Examination of the influence of the 
grinding degree and stabilizing agent on the rheological properties of aqua-coal fuel 
suspensions//Journal of Chemical Technology and Metallurgy
, 
2015
, 
50(2)
, 
стр. 157–162.
ADSORPTION OF AROMATIC HYDROCARBON WITH ACTIVATED ANGREN 
CARBON 
G.M. Gulomova
 
Tashkent State Technical University, 100095, Tashkent, Uzbekistan 
Abstract
.
 
Adsorption methods are used to purify gases with a low content of vaporous and 
gaseous impurities. Unlike absorption methods, they allow gas purification at elevated 
temperatures. Unlike absorption methods, they allow gas purification at elevated temperatures. 
In coal mines and during transportation to industry, dust is formed in coal. This has a negative 
impact on the environment. After coal is extracted from coal mines, it is delivered to the 
necessary production facilities. One of the most pressing problems today is the prevention of the 
accumulation of coal dust and waste in the republic and their targeted production. With the 
adsorption enrichment of coal residues with additives and with the full determination of the 
adsorption properties of the obtained porous carbon adsorbents, we can determine the full 
thermodynamic properties by capillary and volumetric methods in a high-vacuum adsorption 
device with high sensitivity, the calorimetric device DAK 1-1. Having determined the adsorption 
isotherm of benzene, the differential heat, entropy and equilibrium time of the resulting coal, it is 
possible to describe in detail the adsorption capacity of the new adsorbent, the location of active 
centers and the pore size. These circumstances lead to the fact that, in practical terms, the 
reverse process of adsorbent recovery (desorption) turns out to be impracticable, i.e. the 
adsorbent must be replaced after the first absorption operation. Chemical reactions occurring in 
gas-solid systems differ in a number of characteristic features: the volume of the reaction system 
is limited by the limits of the interfacial surface; reactions proceed in the direction of an 
increase in the layer of the solid reaction product formed on a separate particle and in a layer of 
particles; a number of chemical reactions are characterized by an increase in the reaction rate 
over time, explained by the catalytic action of solid reaction products (autocatalysis).