CO_(2) capture by modified clinoptilolite and its regeneration performance  

作　　者：Bo Jiang Bo Zhang Xuqin Duan Yi Xing 

机构地区：[1]School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants,University of Science and Technology Beijing,Beijing 100083,China [3]YangQuan Coal Industry(Group)Co.Ltd.,Yangquan 045000,China [4]School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《International Journal of Coal Science & Technology》2024年第2期81-90,共10页国际煤炭科学技术学报（英文）

基　　金：supported by the Natural Science Foundation of China(42177359);the Open Fund of the National Engineering Laboratory for Site Remediation Technologies(NEL-SRT201907).

摘　　要：This study focuses on CO_(2) capture by pressure swing adsorption(PSA),with modified clinoptilolite as the adsorbent.Natural clinoptilolite is modified by roasting,by acid pickling,by a combination of acid pickling and roasting,and by ion exchange.Modification by acid pickling-roasting and by ion exchange are found to give the highest CO_(2) adsorption capacities,of 730 mL/g and 876.7 mL/g,respectively.It is found that regeneration of clinoptilolite by a combination of vacuum desorption and heating enables recovery of as much as 89%of its previous CO_(2) adsorption capacity.To examine the CO_(2) adsorption capacity of clinoptilolite when applied to mixed gas,a simulated coking exhaust containing 12%CO_(2) and 4%O_(2) is used,and it is found that ion exchange modified clinoptilolite achieves a CO_(2) removal efficiency of 92.5%.A BET test reveals that acid pickling-roasting and Na^(+) modification enhance the porosity of clinoptilolite,thereby improving its adsorption capacity.This work demonstrates the feasibility of applying modified clinoptilolite as an effective adsorbent for COO_(2)capture,providing a promising tool for dealing with greenhouse gases.

关 键 词：CLINOPTILOLITE Carbon dioxide capture Pressure swing adsorption(PSA) 

分 类 号：O64[理学—物理化学]