etc drying steam cracker off gas prior to cryogenic distillation in ethylene plants drying catalytic cracking off gas prior to cryogenic distillations drying of air prior to liquefaction and distillation to make oxygen and nitrogen drying of air for various applications such as instrument control systems drying of recycle hydrogen gas for catalytic reforming for making gasoline and other related drying and separation processes removal of polar compounds such as h 2 o h 2 s so 2 nh 3 cos rsh etc from non polar gases such as natural gas hydrocarbon gases e g from refineries hydrogen and mixtures thereof removal of co 2 or h 2 o from non polar gases removal of co 2 from cryogenic plant feed gases removal of sulfur compounds from natural gas hydrogen purification processes e g 1 from demethanizer off gas containing hydrogen ch 4 co c 2 h 4 c 2 h 2 co 2 and n 2 2 from steam reformer hydrogen containing co 2 h 2 o ch 4 co and nitrogen 3 from off gas from a catalytic reformer containing hydrogen ch 4 c 2 h 6 c 3 h 8 c 4 h 10 and trace amounts of c 5 hydrocarbons 4 from refinery and chemical plant fuel gas streams containing.