energy recovered from both the waste heat boiler and the feed gas adiabatic cooler in addition typical heat requirements in the stripper are small for physical solvents compared to chemical solvents because with chemical solvents more energy is needed to break the stable chemical bonds between the acid gas component and the solvent furthermore the use of additives creates the potential for obtaining a substantial reduction in steam consumption which does not exist in the original aquaclaus process steam consumption can be reduced in the invention because as so 2 removal efficiency increases the liquid circulation rate can be reduced therefore as long as the operating conditions such as the solvent circulation rate temperature solvent concentration and ph can be maintained at a relatively constant level this process is very tolerant the proposed process is virtually insensitive to variation in feed rate and composition such that upsets and variations in upstream processing have little effect on its performance small amounts of impurities such as co 2 and cs 2 can also be tolerated the disclosed absorbing solution has proven to be stable and resistant to poisoning and no expensive catalyst is required tests described by other similar research and in several u s patents in the early eighties restated the advantages of the absorption desorption concept as having relatively low capital investment requirements operating simplicity and flexibility with high so 2 removal efficiency and the resulting emission of very clean vent gas i e less than 100 ppmv so 2 due to a high level of process integration process effluents which normally require treatment to be in compliance with local environmental regulations have either no or very minimal levels of unacceptable products as a result equipment and operating costs are extremely competitive.