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

Science and Education in Karakalpakstan. 2023 №2/1 ISSN 2181-9203 
41 
Knowing the dynamics of sulfur absorption allows us to calculate the forecast for the 
operation of a particular load in the form of a graph of the ratio of the sulfur content in the gas at the 
outlet to the inlet on the total amount of sulfur entering the apparatus. 
The dependence of the sulfur capacity of molded absorbers on temperature in the operating 
range is shown in fig. 2. 
In total, since 1992, NIAP-KATALYZATOR LLC has manufactured about 3,000 tons of 
various absorbers for 18 enterprises. Most of these downloads are still successfully exploited. 
 
Figure 2. Influence of operating temperature of absorber NIAP-02-05 on its sulfur capacity 
Absorbers on a different basis
Recently, attempts have been made to expand the range of substances used to absorb sulfur. 
La and Ce oxides are very promising as high-temperature (800–1000°C) regenerated absorbers. 
According to [6], the research laboratory of the Japanese company Hitachi proposed an 
unconventional chemisorbent for gas purification from hydrogen sulfide, consisting of MoO
3 
and 
TiO
2
. It operates at relatively low temperatures (100–300°C) and is easily regenerated with the 
formation of sulfur dioxide by oxygen containing gas at the same temperatures. 
Mitsubishi has patented a method for purifying fuel gas from hydrogen sulfide using a 
similar absorber containing at least one of the metals of the Fe, Ni, Co group and Mo oxide on a 
carrier consisting of TiO
2 
stabilized with oxide W. The adsorbent is regenerated by heating during 
reuse in an oxygen-containing gas atmosphere. 
Mixed oxides were tested as high-temperature regenerable absorbers, the components of 
which are well known as individual absorbers (Fe
2
O
3
, CaO and ZnO). This made it possible to 
obtain stable sulfides in the specified temperature ranges [1]. 
Another combination of known individual scavengers is ZnO supported on a zeolite. A 
method was also proposed for the preparation of a hydrogen sulfide chemisorbent by impregnating 
support granules (Al
2
O
3
) at 60–80°C with a saturated solution of CuSO
4 
or NiSO
4 
for 3–5 hours. 
The granules are then dried at a gradual increase in temperature from 20 to 105°C. 
Thus, there is a clear tendency to deposit chemisorbents on carriers with a developed –
surface and a porous structure. This ensures high speed and completeness of the sorbent processing 
both in the sorption mode and in the regeneration mode, which makes it attractive to use such 
sorbents in cyclic purification processes, despite the reduced content of the actual absorber. 
In recent years, another direction has appeared for the use of desulphurization of industrial 
gases, primarily with zinc absorbers. We are talking about the "Midrex" process for the production 
of sponge iron by direct reduction of pellets containing iron ore. Recovery is carried out by products 
of steam-carbon dioxide conversion of natural or associated gases, and H
2
O and CO
2 
come with 
gases leaving the shaft furnace after pellet recovery. Since sulfur is contained in both 
natural/associated gas and blast furnaces (as a result of the reduction of FeS contained in the ore), 

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