Preparation of titanium dioxide photocatalyst to remove VOC by impregnation method

• Main Authors: Pei-Jun Chan, 陳佩君
• Other Authors: 魏銘彥
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/15378025386253153364

碩士 === 中興大學 === 環境工程學系所 === 95 === This study aims to investigate influence factors on photocatalytic decomposition of organic compounds by UV/TiO2 process. A pilot-scaled incinerator was studied to obtain optimum operating conditions. FE-SEM, TEM, and XRD results of catalytic morphology were also conducted for understanding the mainly reaction mechanisms. These results indicated that a well structured anatase TiO2 was obtained by impregnation method under 500℃. Flow rate, in the activity test, could be neglected for mass transfer effects. As a matter of fact, relative humidity played the most important role in this reaction. The highest removal efficiency was obtained while relative humidify of 56.8%. Water molecules are sources of ; however, excessive water molecules could inhibit reactions by competing activity sites with organic containments. In the regeneration test, photocatalyst could be reactivated through a running water vapor with UV light illumination process. In the test of flue gas, the catalyst could undergo photocatalyst reaction to kinds of organic containments at the same time. Among all types of reactors, fluidized bed was more effective than fixed bed was. Quartz sand was sufficient material as fluidized bed supporters. This result suggested that a greater contact area in the fluidized bed lead a more significant reaction.