• 作者： Chang, Chen-Chang; Weng, Hung-Shan
• 中文摘要： 本研究是利用一套微分固定床反應器,在維持低轉化率下,於239至255.degree.C溫度範圍內進行甲苯之完全氧化反應。經評估幾種可能動力學模式之適用性後,結果發現一種單活性座、雙分子反應(包括了氧分子分解成氧原子再與甲苯分子進行競爭吸附)之蘭格米奧-辛薛悟德速率模式,可以用來描述此一反應。此一模式適用於:高氧氣濃度、低甲苯濃度、觸媒量大、與低轉化率時,在高溫所導致高轉化率時則不適用。再於226至245.degree.C溫度範圍內進行醋酸乙酯之完全氧化反應,結果顯示此種觸媒活性很好,在我們的實驗中,達到百分之九十轉化率所需之溫度約為234.degree.C,比甲苯之值(270.degree.C)還低,同時我們發現前述之速率模式在此一例子中依然適用。最後,將上述兩個結果合併,假設這兩種反應物與氧原子之間進行競爭吸附,則可將上述之單成分氧化速率模式擴充為同時有雙成分氧化之速率模式,經由我們的實驗數據顯示,此一模式大致上可以適切地用來描述甲苯與醋酸乙酯之同時氧化反應。我們也發現這兩種反應物之反應速率,在同時氧化反應過程中,彼此之間所受到的影響很小,並未發現醋酸乙酯之反應速率受甲苯影響而變大之現象。
• 英文摘要： The catalytic incineration of ethyl acetate and toluene over perovskite catalysts was investigated by employing a fixed-bed flow reactor. The results reveal that perovskites are suitable for the treatment of both compounds, separately or simultaneously. To acquire the kinetic data, the reactor was operated at low conversions. A Langmuir-Hinshelwood rate model incorporating a dual-site mechanism with competitive adsorption of atomic oxygen and reactant (ethyl acetate or toluene) was found to be suitable for high partial pressures of oxygen, low partial pressures of reactant, large catalyst weights, and low conversion. We found that a rate expression basing on a three-component Langmuir-Hinshelwood model can adequately be used to correlate the experimental data obtained in the simultaneous catalytic oxidations of toluene and ethyl acetate. The results of the simultaneous catalytic oxidation show that the mutual effects of different components are small and no enhancement were observed.
• 中文關鍵字： 觸媒灰化; 乙酸乙酯; Langmuir-Hinshelwood速率模式; 甲苯; 觸媒
• 英文關鍵字： Catalytic Ashing; Ethyl Acetate; Langmuir-Hinshelwood Rate Model; Perovskite; Toluene; Catalyst