石化製程排放管道中揮發性有機化合物（VOCs）改善實例－以鉑/鈀貴金屬觸媒催化燃燒方式

Abstract

Abstract Student ID: N9931002 Title of Thesis: Reduction of stack VOCs from petrochemical production process via Platinum/Palladium catalytic combustion Total Pages: 72 Name of Institute: National Pingtung University of Science and Technology Name of Department: Department of Environmental Science and Engineering Date of Graduation: July 2012 Degree Conferred: Master Name of Student: Wei-Lun Yeh Adviser: Dr. Kuo-Ching Chang The Contents of Abstract in this Thesis： The stack VOCs from petrochemical production process is one of the main sources of volatile organic compounds (VOCs) in the air in Lin Yuan Industrial Zone, an important petrochemical center in Taiwan. After evaluating the characteristics of the VOC’s from the production process of some petrochemical facility in the Linyuen industrial Zone, the platinum / palladium catalytic incinerator is applied as stack end treatment. The online flame ionization detection (NIEA A723.72B) published by Environmental Protection Administration (EPA), R.O.C. (Taiwan), is applied to determine total hydrocarbons and total non-methane hydrocarbon contents from the discharge pipeline and tested under different conditions: various combustion temperature, VOCs concentrations ,and exhaust gas flow rates, toevaluate the efficiency as the basis for the operation parameters. The experiment consisted of two stages. At first stage, it was to evaluate the temperature and flow-rate dependence of heat recovery with feeding containing no VOCs. The feeding containing VOCs was applied to the second stage to study the relation between incoming concentration and destructive removal efficiency (DRE) of VOCs under various operation conditions, and evaluated energy consumption of the operation conditions. The results showed: (1) operation at heating temperature 350 ℃ and exhaust gas flow rate 600, 960, and 1,200 Nm3/hr,respectively,the exit concentration of VOCs could be reduced to less than 150 ppm, and DRE could reach to more than 95 %,complying with the Environmental Protection Administration Act, R.O.C.(Taiwan). Repeat the same operation at lower heating temperature , 330 and 340 ℃, DRE could still attain to more than 95 %, the results still complied with the Act; (2) the optimal operation condition with exhaust concentration of 4,766 ppm, at 350 ℃, 600 Nm3/hr achieved the best DRE (98.05 %); (3) the average energy cost of the optimal operation condition was NT$19.9 per 1,000 Nm3 exhaust; (4) at same combustion temperature, the higher the exhaust concentration and stronger exhaust gas flow rate, the poorer heat recovery; (5) the energy consumption increases as the combustion temperature and exhaust gas flow rate increased,and decreased as the exhaust concentration increases. Keywords:VOCs, Platinum/Palladium catalyst, Catalytic cinerators, Destruction removal efficiency