A method of purifying gaseous mixtures, for example ternary or quaternary gaseous mixtures, using a sorbent media comprising two or more sorbent materials. The method involves obtaining a target gas from a gaseous composition comprising the target gas, a first gas and a second gas, and optionally further gases by contacting the gaseous composition with the sorbent media to remove at least some of the first gas and at least some of the second gas from the gaseous composition. The sorbent media comprises at least a first sorbent material and a second sorbent material; wherein the first sorbent material has a higher adsorption selectivity for the first gas than for the target gas; and wherein the second sorbent material has a higher adsorption selectivity for the second gas than for target gas. The method may be particularly useful for the separation of pure ethylene, methane or propylene from such gaseous mixtures. A sorbent media and an apparatus for obtaining a target gas from such a gaseous composition are also disclosed.
一种利用由两种或两种以上吸附材料组成的吸附介质净化气体混合物(例如三元或四元气体混合物)的方法。该方法包括从由目标气体、第一种气体和第二种气体组成的气态组合物中获取目标气体,并通过将气态组合物与吸附剂介质接触,从气态组合物中除去至少部分第一种气体和至少部分第二种气体。吸附剂介质至少包括第一种吸附剂材料和第二种吸附剂材料;其中第一种吸附剂材料对第一种气体的吸附选择性高于对目标气体的吸附选择性;第二种吸附剂材料对第二种气体的吸附选择性高于对目标气体的吸附选择性。该方法尤其适用于从此类气体混合物中分离纯
乙烯、
甲烷或
丙烯。此外,还公开了一种吸附剂介质和一种从这种气体混合物中获得目标气体的装置。