Patent ID: 8857212

Claim:
A process for the separation of a contaminant or mixture of contaminants from a CH 4 -comprising gaseous feed stream, comprising the subsequent steps of: a) passing a CH 4 -comprising gaseous feed stream comprising the contaminant or the mixture of contaminants into and through a cold porous body having a temperature below the sublimation temperature of the contaminant or the mixture of contaminants and contacting the CH 4 -comprising gaseous feed stream at elevated pressure with the surface of the cold porous body to obtain a porous body comprising solid contaminant or mixture of contaminants and a contaminant-depleted product gas; and b) reducing the pressure to obtain fluid contaminant or mixture of contaminants and the cold porous body, c) removing the fluid contaminant or mixture of contaminants, wherein the contaminant is selected from CO 2 , hydrogen sulphide, mercaptans, siloxanes and carbonyl sulphide, or a mixture thereof.