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

Fig
3. Molar integral entropy of adsorption of benzene vapor on an adsorbent obtained from 
local coal tailings at a temperature of 303 K 
 
The regeneration of the adsorbent is provided by desorption of the adsorbate from its 
pores and requires corresponding energy costs. In this regard, the role of such properties of 
adsorbents as heat capacity, thermal conductivity, as well as the threshold (highest) temperature 
of maintaining the crystalline structure of the adsorbent is clear.
The speed of desorption, drying, cooling of adsorbents, as well as energy consumption for their 
implementation, depends on these properties. 
-150
-130
-110
-90
-70
-50
-30
-10
10
30
50
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
а
, 
ммоль/г

S
d
,
к
Дж
/м
оль*К
а
, mol/g
ΔS
d
, k
J/
m
ol
*K
Q
d
, 
kJ
/m
ol
а
, mol/g
30
40
50
60
70
80
90
100
110
0
1
2
3
4
а
, 
ммоль/г
Q
d
, кДж
/мо
ль 
Δ
H
v 

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Chemistry and chemical technology 
71 
Conclusion 
The activated absorbent carbon obtained in our study was obtained from local carbon 
residues and its properties were studied. The fact that the adsorption isotherm and the 
temperature difference are initially high indicates that this adsorbent is adsorbed in the 
micropores. Due to the small pore size, the absorbed benzene molecules release a large amount 
of energy. This provides a high heat of adsorption. The main feature of the obtained adsorbent is 
that, with the effective use of residual coal products, the raw material required for the 
manufacturing industry is obtained. Currently, the technology of gas purification in a fluidized 
bed of an adsorbent is widely used. The advantage of this technology is the high gas flow rate 
(an order of magnitude higher than with periodic adsorption technology).