Progress in the Application of X Zeolite in Adsorption  

作　　者：Wang Yubing Wang Huiguo 

机构地区：[1]SINOPEC Material and Equipment Department [2]SINOPEC Research Institute of Petroleum Processing

出　　处：《China Petroleum Processing & Petrochemical Technology》2019年第1期1-6,共6页中国炼油与石油化工（英文版）

摘　　要：The application of X zeolite in the areas for producing para-xylene by adsorptive separation, N_2/O_2 separation,etc., was reviewed, and the framework SiO_2/Al_2 O_3 molar ratio, the cations and the water content of X zeolite significantly affected its selectivity and capacity. As the active component of para-xylene adsorbent, the X zeolite with a framework SiO_2/Al_2 O_3 molar ratio of 2.2—2.4 coupled with cations of Ba^(2+) and K^+, as well as a water content of 4.0%—5.0% exhibited higher para-xylene selectivity. For N_2/O_2 separation, higher N_2 capacity and N_2/O_2 separation factor were achieved when the X zeolite had a framework SiO_2/Al_2 O_3 molar ratio of 2.0 coupled with Li^+ cations. The introduction of another cation in X zeolite could further increase the N_2/O_2 separation factor, while the adsorption of water, however, could lead to a remarkable decrease of N_2 capacity. Besides, the X zeolite could be used in adsorptive separation of highly pure He and selective adsorption of CO_2, CO, CH_4, N_2, Ar,and H_2.The application of X zeolite in the areas for producing para-xylene by adsorptive separation, N_2/O_2 separation,etc., was reviewed, and the framework SiO_2/Al_2 O_3 molar ratio, the cations and the water content of X zeolite significantly affected its selectivity and capacity. As the active component of para-xylene adsorbent, the X zeolite with a framework SiO_2/Al_2 O_3 molar ratio of 2.2—2.4 coupled with cations of Ba^(2+) and K^+, as well as a water content of 4.0%—5.0% exhibited higher para-xylene selectivity. For N_2/O_2 separation, higher N_2 capacity and N_2/O_2 separation factor were achieved when the X zeolite had a framework SiO_2/Al_2 O_3 molar ratio of 2.0 coupled with Li^+ cations. The introduction of another cation in X zeolite could further increase the N_2/O_2 separation factor, while the adsorption of water, however, could lead to a remarkable decrease of N_2 capacity. Besides, the X zeolite could be used in adsorptive separation of highly pure He and selective adsorption of CO_2, CO, CH_4, N_2, Ar,and H_2.

关 键 词：FAU PARA-XYLENE air SEPARATION SELECTIVITY 

分 类 号：TE[石油与天然气工程]