ABSTRACT
There have been a number of recent developments in gas sweetening. New processes have been developed, new data reported, and new calculation procedures suggested. The reactions involved are essentially the same as those with the ethanolamines and are reversible by heating at low pressure. The Potassium Carbonate Process was developed by the U. S. Bureau of Mines for the bulk removal of carbon dioxide from synthesis gas streams. The physical solvent utilizes its attraction for the acid gas constituents for their solution in the solvent. The ideal physical solvent would be free of cost, noncorrosive, stable under all operating conditions, have a low viscosity, be nonvolatile and noninflammable, and have no foaming characteristics. Crystalline alumino silicates can be used for removal of H2S and other sulfur compounds from natural gas streams. Process flow for the physical solvents is essentially that of high pressure absorption followed by regeneration by flashing at low pressure.
