Deep Oxidation of VOC Using Supported Pt Hydrophobic Catalysts

• Main Authors: Chang, Tai-Yuan, 張泰元
• Other Authors: Chi-Sheng Wu
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/70563695755173694867

碩士 === 國立臺灣大學 === 化學工程學系研究所 === 85 === The destruction of VOCs from industrial contaminant is often used by catalytic oxidation. It costs less to operate at lower temperature since energy consumption is reduced. The water vapor from reaction can easily condense in the micropores of metal oxide support at low temperature. Hence, the surface of metal oxide is cloaked and the activity of catalyst is significantly reduced. The hydrophobic supported catalyst can be used at low temperature since water vapor from oxidation can not condense in its pores. Thus its catalytic activity is not influenced by humid environment. In this work, SDB ,the hydrophobic polymer(with a surface area of ~500 m2/g and contact angle with water of ~ 109o), and active carbons were used as support for Pt catalyst by incipient wetness method. The physical properties of catalysts ,such as specific surface area and Pt dispersion, were characterized by BET、XRD、H2-TPD、ESCA、 EDS、SEM techniques. We also studied the characteristics of catalyst before and after reaction. The activity of catalyst was tested by using different ratio of feed stock (toluene/air) for the deep oxidation. A kinetic model was proposed to compare the effect of hydrophobicity for the activity of catalysts. SDB catalyst showed the highest activity under the test condition at 130℃-150℃and the complete oxidation of 90 ppm toluene was observed at 150℃.