A Study on Cl-COC Decomposed over Mn2O3/γ-Al2O3 Catalyst

• Main Authors: Fang-Chiao Liu, 劉芳巧
• Other Authors: Hsin Chu
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/t4fvfg

碩士 === 國立成功大學 === 環境工程學系碩博士班 === 90 === Volatile organic compounds (VOCs) are the typical pollutants emitted from the petrochemical industrial processing. They can easily release radicals to react with some chemical compounds, such as NOx and Ozone in the atmosphere, to form the photochemical smog. Hence, VOCs are the main targets to prevent air pollution from the petrochemical industry. Cl-COC decomposed over Mn2O3/γ-Al2O3 catalyst in the fixed bed reactor was conducted in this study. The explanation of results can be divided into four major parts. 1. We can find catalytic pore shape is not changed very much by calcination. The catalytic pore shape of the catalysts are all like “ink bottle” after impregnated, calcined and reduced, From XRD results, we can find the last catalytic crystal becomes Mn2O3. 2. The effects of adding water on the catalytic incineration of TCM were performed. The results show that conversion of TCM increases as adding 10% water. We can’t find any chloric products but HCl in the process of reaction. 3. Three kinetic models, including Power rate law、Mars-Van Krevelen model and Langmuir Hinshelwood model were used to fit the kinetic data of the decomposition of TCE. In the operation range of this experiment, we can find that Mars and van Krevelen model is suitable for the catalytic decomposition of DCE. We obtain the activity energy Ea=43.55 KJ/mole. 4. We use Chemkin III Application PLUG to analyze plug flow reactors in this study. A comprehensive experimental and numerical study has been performed in both the detailed TCE/O2 catalytic decomposition kinetics and the sensitivity analysus. But the result and the experimental data can’t match well . The bad result may produced from that we described the surface reactions too simple.