Influence of by-product salts and Na2CO3 contents on gas–liquid mass transfer process in wet desulfurization of water gas

Investigating equilibrium in the system of a hydrogen sulfide-quinhydrone absorbing solution

“…However, the greater the concentration of hydrogen sulfide in the solution, the less the effect of the NaCNS concentration. It is obvious that the derived results of the influence exerted on the coefficient of equilibrium distribution by hydrogen sulfide are associated with changes in the ionic capacity of solutions [23,24] with the growth in the concentrations of components in the quinhydrone solution.…”

“…Therefore, studying the equilibrium distribution of the components in the multicomponent systems gas-liquid often involves experimental research. This approach is used in works [23][24][25][26], whose authors investigated the equilibrium concentrations of hydrogen sulfide in carbonate solutions in the presence of ballast substances (NaCNS, NaHCO 3 , NaCl, etc.). Studies of equilibrium in the vacuum-carbonate methods of gas purification from hydrogen sulfide showed that in the presence of ballast salts (NaCNS, NaHCO 3 ) in absorbing solutions, compared to pure soda solutions, the partial pressure of hydrogen sulfide above them increases [24,25].…”

Solubility of H2S under Haloalkaliphilic Conditions: Experimental Measurement and Modeling with the Electrolyte NRTL Equation

“…Then, HS − is oxidized to sulfur in the presence of sulfur-oxidizing bacteria. 11 In our lab, we further developed the haloalkaliphilic biological desulfurization process with higher pH and sodium concentrations than conventional bio-desulfurization. 12−14 The biological desulfurization process under haloalkaline conditions is dominated by chemolithoautotrophic haloalkaliphilic sulfideoxidizing bacteria, Thialkalivibrio versutus.…”

“…Most of the processes, such as Shell–Paques/THIOPAQ and haloalkaliphilic biological desulfurization process, , , are based on the use of aqueous solutions of alkaline carbonates, which can react with dissolved H 2 S in the absorber column to form HS – ions. Then, HS – is oxidized to sulfur in the presence of sulfur-oxidizing bacteria . In our lab, we further developed the haloalkaliphilic biological desulfurization process with higher pH and sodium concentrations than conventional bio-desulfurization. − The biological desulfurization process under haloalkaline conditions is dominated by chemolithoautotrophic haloalkaliphilic sulfide-oxidizing bacteria, Thialkalivibrio versutus.…”