Catalytic Decomposition of Ozone

• Main Authors: Janq,Lan, 鄭嵐
• Other Authors: Chang,Ching-Yuan
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/02971905696727924489

碩士 === 國立臺灣大學 === 環境工程研究所 === 84 === The decompositions of hazardous ozone gas were investigated over commercial platinum alumona catalyst and manganese deoxide, respectively. The performance tests were various space velocities(15,000-60,000 1/hr). The reaction kinetic studies were carried out by the use of steady state plug flow reactor. About 99.8 % destruction efficiency of ozone with inlet concentration of 0.15-0.19 mol/m3 was obtained at a catalyst and a reaction temperature of 323 K for platinum alumina destruction efficiency of ozone with the same concentration at a higher catalyst contact time of 0.1 sec.(space velocity of about 38.000 1/hr) and a higher reaction temperature of 338 K. The results indicated that the platinum alumina catalyst gave higher conversions of ozone than manganese dioxide at the same conditions. For reaction kinetics, it was found that the first order reaction mechanism was appropriate for the catalytic decomposition of ozone investigated in this study. The proposed first order reaction model gave good agreement with the experimental results. The activation energies for catalytic decompositions of ozone on platinum alumina catalyst and on manganese dioxide were 51.1 and 53.2 kJ/mol, respectively. The corresponding pre-exponential factors were 3,681 and 1,863 mol/( s.g catalyst.(mol/m3)), respectively.