Among the most toxic pollutants hydrogen sulfide is one of the "leading" ones. It gets into atmosphere and water mainly from industrial processes, particularly in mining and processing of sulfur crudes, coal gasification, biomass processing.
Currently there are various methods of purification of hydrogen sulfide gas, which are applied depending on conditions. The choice of treatment depends on many factors. One of the most important performance criteria is the amount allocated for the installation of sulfur, which is determined by the flow of gas and the concentration of hydrogen sulfide.
When amount of sulfur is higher than 15 t / day, the most economically feasible process is the chemical absorption of amine solution and subsequent disposal of acid gases in the Claus plant.
In case of gas feedstock in terms of sulfur is less than 5 tons/day THIONOL Process is the most feasible one.
Procedure of treatment is rendered to batches process of sequence of chemo sorption of sulfur compounds followed by oxidative regeneration of catalyst.
Core of the process is absorption of H2S, CO2 and RSH onto the catalyst THIONOL followed by regeneration by air.
High pressure gas flows through absorber (contactor) to gas-oil separator. Separator is assigned to separate purified gas from liquid catalyst.
Continuous contact is provided by circulation of catalyst solution in sequence: separator > pump > absorber >separator
The bubbler is positioned horizontally along the lower generatrix of the shell of the vessel and a pipe-in-pipe construction (both ones are perforated). Regeneration procedure is brought to bubbling air passing thorough the catalyst layer to recover its activity.