Study on liquid phase photocatalytic reduction of CO2 using metal-Ti-MCM-41 photocatalysts

• Main Authors: Song, Jhih-cheng, 宋志成
• Other Authors: Bai, Hsun-ling
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/91983864779496166868

碩士 === 國立交通大學 === 環境工程系所 === 99 === Among the carbon dioxide absorption technologies, the ethanolamine and ammonia are two of the most popular absorbents. Therefore, this research used ethanolamine and ammonia as liquid sorbents for the photocatalytic reduction of carbon dioxide so that the CO2 can be absorbed and then reduced into valuable energy sources. The photocatalysts were prepared and their chemical and physical properties of the photocatalysts were analyzed by ICP-AES, XRD, BET, TEM, FTIR, UV-VIS and ESCA. To effectively increase the methane production rate by CO2 reduction process, the optimization parameters were also investigated in this study. The Ti-MCM-41(100) was firstly synthesized by hydrothermal method to evaluate the possibility of using CO2 absorbents, ethanolamine and ammonia, as the reducing agents. The results showed that ethanolamine had a better CO2 reduction efficiency and thus this study was then focused on using the ethanolamine as the absorbent and reducing agent. And several metals (V, Zn, Zr, Mn, Mo) were implanted into the mesoporous material of MCM-41 to form the metal-Ti-MCM-41 photocatalysts. The results showed that bi-metallic Mo-Ti-MCM-41(50) was the best photocatalyst for the CO2 reduction to form methane, the best methane production rate was 1.83μmol/g．hr. And when the reaction temperature was 40℃, the methane production rate was higher than that at 25℃.