Gas-phase photocatalytic decomposition of isopropanol by using TiO2

• Main Authors: HSING-FU CHENG, 鄭幸福
• Other Authors: SHWN-JER CHIU
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/45238863900265061674

碩士 === 明志科技大學 === 化工與材料工程研究所 === 96 === The purpose of this research is to study the synthesized of titanium dioxide by the sol-gel method and coated on the surface of stainless steel, and, the stainless steel substrate has been chosen due to the large surface area. The synthesized titanium dioxide were characterized by different instrument analyses, the crystallized titanium dioxide was anatase phase with particle size about 200±40 nm, BET surface area 10.6 m2/g. In this study, the experimental operating parameters included the initial concentration of isopropanol （905 ppm）, operating pressure （1 atm）, photoreactor temperature（75±1℃）, relative humidity（10±1％）and total gas flow（200 ml/min）, investigated the effect of titanium dioxide photocatalyst which illuminated by UV light of 254 nm for the gas phase isopropanol photocatalytic oxidation reaction. The concentration of decomposed of self-made titanium dioxide was 905 ppm isopropanol, and the conversion could maintained about 95% but has obviously change in the mineralization efficiency. The sampled of photocatalytic oxidation reaction were started from 60 minute, and it shows 63% in the mineralization efficiency, since the duration of reaction increased to 300 minute but the mineralization efficiency decreased to 29%. Added 200 ppm concentration of DSS to self-made titanium dioxide made the conversion and mineralization efficiency of isopropanol was 94% and 43%, respectively. On the other hand, added OPE and CPC surfactant agent to isopropanol resulted about 40~50% in the conversion, mineralization efficiency were 20% and 30%. The results shows the mineralization efficiency does not decreased with duration of reaction increase if DSS added in titanium dioxide.