Acenaphthylene(Acpy)為美國環境保護署(USEPA)法規中所列管空氣毒性化合物之一。近年來電漿技術常應用在處理分解毒性物質,但電漿技術在操作過程中所耗用電力相當可觀,為人所詬病。因此本研究為降低電漿操作成本,同時驗證電漿處理毒性化合物效率,本研究方法係以計算流體力學(CFD)數值方法為依據,利用商業FLUENT套裝軟體來模擬3D常壓電漿反應器處理餐飲業逸散性油煙中Acpy化合物之溫度、速度、莫耳分率分佈,並討論反應器中Acpy去除率。其中數值方法採用有限體積法,以SIMPLE演算法校正壓力與速度。 本研究紊流模式採用RNG k-ε模式,燃燒模式分別採用Finite-rate渦流消散模式(EDM)。模擬時,常壓電漿反應器的尺寸與操作條件,依照本研究團隊開發之常壓電漿反應器(國科會計畫編號:NSC95-2211-E020-020),於前述常壓電漿反應器進行相關試驗,所得試驗數據做為數值模擬比對依據。利用CFD數值模擬方法可有效輔助實驗結果之討論,更可節省電漿反應器實驗操作成本,俾助以電漿技術處理空氣毒性化合物之了解。
The United States Environmental Protection Agency (US EPA) ranked acenaphthylene (Acpy) as 16 among polycyclic aromatic hydrocarbons (PAHs) in terms of priority air pollutants. Despite the use of plasma technology in recent years to treat and decompose toxic compounds, power consumption costs during plasma operations are prohibitively high. Reducing plasma operational costs and validating the destructive efficiency of toxic compounds by using plasma are thus of priority concern. This study simulated an atmospheric plasma reactor by using a method based on computational fluid dynamics (CFD). The commercial FLUENT code was then adopted to simulate the Acpy compound by using a three-dimensional atmospheric plasma reactor in order to treat cooking fume exhaust emitted from the restaurant kitchen. Next, parameters of the temperature, velocity mass fraction and efficiency of Acpy compound decompose in the code were examined to determine how they influence the atmospheric reactor. The numerical approach was based on refers to a specific finite volume method. The RNG κ-ε turbulence model, the SIMPLE algorithm and finite-rate eddy dissipation model were employed to solve in the combustion case. During simulation, the atmospheric plasma reactor size and operating parameters were taken from the self-designed atmospheric plasma reactor in our previous study (NSC95-2211-E020-020). Additionally, CFD simulation results and measurement data were compared and discussed. According to results, CFD simulation can reduce operating costs associated with plasma reactor experiments. Results of this study provide a valuable reference for efforts to treat air carcinogenic compounds by using an atmospheric plasma reactor.