关键词: 二氧化碳, 甲烷, 吸附分离, 影响因素

Abstract: There are many types of adsorbents which are used for adsorption and separation of CO2/CH4 binary mixtures system. It is the various characteristics of adsorbents that affect separation result. As a starting point，four kinds of adsorbent properties affecting separation，which include porous structure，exchangeable cations，surface chemistry and moisture of adsorbent，are summarized in this article and the reason of all kinds of influences are explained. We come to several conclusions，including that mesoporous is conducive to the separation and amine grafting；the introduction of corresponding exchangeable cations can enhance the affinity between quadrupole and adsorbents，and improve the adsorption selectivity；surface hydroxyl is also an important factor affecting grafting amine；moisture can enhance the separation performance of adsorbent but also is conducive to grafting amine.

Key words: carbon dioxide, methane, adsorption separation, effect factor