3022.     SANDS, A. E., AND SCHMIDT, L. D.  Recovery of Sulfur From Synthesis Gas.  Ind. Eng. Chem., vol. 42, No. 11, 1950, pp. 2277-2287.

        Review of the more important commercial processes for removing H₂S from synthesis gas made from coal.  Factors that differentiate synthesis gas-purification from other gas-purification problems are discussed.  The relation between S content of the coal used for synthesis-gas production and the cost of synthesis-gas purification is explored by cost estimates for gas purification and S recovery.  These estimates are not to be considered precise or final but have been prepared as a basis for discussion and future revised cost estimates of a more accurate nature.