Science and Education in Karakalpakstan issn 2181-9203 Science Magazine chief editor

→ CH
4 
+ H
2
O + H
2
S,
CS
2 
+ 2H
2 
→ C + 2H
2
S,
CS
2 
+ 4H
2 
→ CH
4 
+ 2H
2
S.
Catalysts based on elements of groups VI and VIII are widely used for hydrodesulfurization. 
Basically, Co or cheaper Ni (3–5%) and Mo (10–15%) deposited on active γ-Al
2
O
3 
are used. For 
stable operation of catalysts, it is necessary that the gas contains at least 5% (preferably 9–11%) 
hydrogen. The presence of CO and CO
2 
in the purified gas
in an amount of 1–2% does not affect the 
purification process. 
A simplified approach to the calculation of the hydrogenation stage is as follows [1; 4]. 
Assuming that: a) the reaction order in terms of organic total sulfur is the first; b) the temperature 
along the gas is constant; c) ideal displacement occurs in the catalyst layer, we get 
V = k/ ln (c
in 
/ 

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Science and Education in Karakalpakstan. 2023 №2/1 ISSN 2181-9203 
38 
c
out
)
, where 
V
 
is the volumetric velocity of the gas flow; 
k 
is the rate constant; 
c 
in 
and 
cout
are 
the 
input and output contents of organic total sulfur, respectively. 
At different input contents 
c
1in 
and 
c
2in 
for the volumetric velocities 
V
1 
and