HYDROGEN SULFIDE GAS UTILIZATION PLANT

doi: 10.65402/npnh.2025.11.008
UDC: 504.05: 665.61. 7
Received: 18.09.2025
Pages 63-68

Abstract. At industrial facilities, the desulfurization problem of gas raw material is solved by absorption purification followed by subsequent processing of highly concentrated sulfurous gases (acidic gases) in Claus installations. Plants are difficult to handle acidic gases with less than 50-60% hydrogen sulfide by volume. For processing acidic gases with 10-50% hydrogen sulphide, oxygen-enriched air is proposed or a branched flow (1⁄3-2⁄3) is used instead of a straight flow. At the same time, processing of acidic gas up to 20% hydrogen sulfate is possible only if the gas and oxygen are preheated simultaneously. However, these solutions do not meet the required environmental standards, and the conversion rate of hydrogen sulfides to sulfur is less than 94-95%. The main disadvantage of Claus plants is that they cannot process acidic gases with low flow rates, and purification of hydrocarbons from hydrogen sulfides directly without separating hydrogen sulfides from the purified gas with an amine or other sorbent is not possible. World experience has shown that it is justified to build Claus plants with a capacity of 5-10 tons/day for processing acidic gases. The concentration of hydrocarbons should not exceed 3% in acidic gas. This paper proposes solving this problem using direct catalytic oxidation on a solid catalyst and efficient heat removal in the reactor. The paper describes a scheme proposed by authors for direct oxidation installation. It shows that using a two-stage thermosiphonic device with steam heater and catalytic oxidation unit linked to thermosiphone through a liquid coolant supply line and vapor makes it possible for acidic gases containing 60% vol hydrogen sulfides. Computational studies using Unisim design software make it possible to determine optimal conditions for selective oxidation of sulfur into marketable products and environmental indicators.

Key words: hydrogen sulfide, recycling, Claus plant, direct catalytic oxidation plant, installation scheme, thermosiphon device, optimization, sulfur

For citation: Ismagilov F.R., Zhagfarov F.G., Ishmurzin A.A., Savenkova I.V. Hydrogen sulfide gas utilization plant. Neftepererabotka i neftekhimiya. 2025, no. 11, pp. 63-68. (In Russ.) DOI 10.65402/npnh.2025.11.008