<span style="font-size:12.0pt;line-height: 115%;font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; color:#191919;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language: HI" lang="EN-IN">Low pressure equilibrium between H₂S and alkanolamine revisited</span>

125-133Absorption of H2S in aqueous a1kanolamine solution is of considerable commercial importance. A simple method is presented to determine the equilibrium pressure having very low loading of H2S, with the help of 'sulfide' ion-selective electrode. By this method H2S-DEA and H2S-TEA VLE-data were obtained at different amine concentration and temperatures. A theoretical analysis of equilibrium between H2S and aqueous a1kanolamine solution has been reviewed. A semi empirical model with a correlation parameter,β-factor, is introduced to predict the equilibrium between H2S and alkanolamines.</span

Low pressure equilibrium between H2S and CO2 over aqueous alkanolamine solution

242-249The simultaneous absorption of H2S and CO2 in aqueous alkanolamine solution is of considerable commercial importance. The reversible nature of reactions always results in equilibrium partial pressure of CO2 and H2S over amine solution. A simple method is presented to determine the equilibrium partial pressure having very low loading of H2S and CO2 with the select-ion electrode. The entire equilibrium is divided into two parts, namely first equilibrium and the final equilibrium. A (H2S + CO2)- aqueous alkanol amine system is highly non-ideal. Therefore, an attempt has been made to correlate data by using 'final equilibrium' expression based on ideal behaviour and then introducing a lumped correction factor (β) to predict observed data between H2S-CO2 and diethanolamine solution. This methodology being process engineering friendly can be extended to other systems also