Comparison of the CO2 Greenhouse Gas Capture by Commercial Zeolites and Its Metal Modified Adsorbents

• Main Authors: Chang, Chih-Chieh, 張智傑
• Other Authors: Bai, Hsun-Ling
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/52543779884730387868

碩士 === 國立交通大學 === 環境工程系所 === 100 === Zeolitic materials are widely used in CO2 GHG removal due to its lower price and selective adsorption ability for target adsorbate according to their different pore sizes. This study aims to find the zeolitic adsorbent with high CO2 removal performance and lower price. The cation-exchanged method and thermal treatment were both employed to modify the zeolite support to enhance its CO2 adsorption performance. From the experimental results, it’s known that using 0.5M potassium solution and repeat the modified procedure to enhance the metal loading on the 13X zeolite could reach the best performance of CO2 capture, 68mg-CO2/gads, which increases 60% adsorption capacity as compared with the raw material. However, as the pretreatment temperature was changed from 145℃ to 400℃, the CO2 cpature performance of raw 13X zeolite became better than the metal modified adsorbent of KX(0.5M)-Ⅱ. Such change is due to the increase trend of basic active sites as measured by CO2-TPD. In this study the hydrothermal stability was also tested by boiling in 105℃ hot water for 24 hours, and the long-term stability was evaluated by l01 cyclic tests on CO2 adsorption/desorption. The results showed that the modified adsorbent KX(0.5M)-II was a relatively better material with better hydrothermal stability and long-term stability.