Environ Technol. 2014 May-Jun;35(9-12):1499-507. doi: 10.1080/09593330.2013.871351.
Few studies have investigated the use of activated carbon fibres (ACFs) impregnated with metal oxides for the catalytic oxidation of volatile organic compounds (VOCs). Thus, the effects of the ACF-supported metal oxides on toluene removal are determined in this study. Three catalysts, namely, Ce, Mn, and Cu, two pretreatment solutions NaOH and H2O2, and three reaction temperatures of 250 degrees C, 300 degrees C, and 350 degrees C, were employed to determine toluene removal. The composition and morphology of the catalysts were analysed using Brunauer-Emmett-Teller (BET), transmission electron microscope (TEM), inductively coupled plasma (ICP), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectrometer (FTIR), and thermo-gravimetric analyser (TGA) to study the effects of the catalyst's characteristics on toluene removal. The results demonstrated that the metal catalysts supported on the ACFs could significantly increase toluene removal. The Mn/ACFs and Cu/ACFs were observed to be most active in toluene removal at a reaction temperature of 250 degrees C with 10% oxygen content. Moreover, the data also indicated that toluene removal was slightly improved after pretreating the ACFs with NaOH and H2O2. The results suggested that surface-metal loading and the surface characteristics of the ACFs were the determinant parameters for toluene removal. Furthermore, the removal of toluene over Mn/ACFs-H202 decreased when the reaction temperature considered was > 300 degrees C.
鲜有研究调查过金属氧化物浸渍的活性炭纤维 (ACF) 在挥发性有机化合物 (VOC) 催化氧化中的应用。因此，本研究旨在确定 ACF 负载的金属氧化物对甲苯去除的影响。本研究采用了三种催化剂（Ce、Mn 和 Cu）、两种预处理溶液（NaOH 和 H2O2）和三个反应温度（250°C、300°C 和 350°C）来确定甲苯的去除率。采用比表面积仪（BET）、透射电子显微镜（TEM）、电感耦合等离子体（ICP）、X 射线光电子能谱（XPS）、傅里叶变换红外光谱仪（FTIR）和热重分析仪（TGA）分析催化剂的组成和形态，以研究催化剂特性对甲苯去除的影响。结果表明，负载在 ACF 上的金属催化剂可以显著提高甲苯的去除率。在 250°C、10%氧气含量的反应温度下，Mn/ACFs 和 Cu/ACFs 对甲苯的去除效果最为显著。此外，数据还表明，用 NaOH 和 H2O2 预处理 ACF 后，甲苯的去除率略有提高。结果表明，表面金属负载和 ACF 的表面特性是甲苯去除的决定因素。此外，当考虑的反应温度超过 300°C 时，Mn/ACFs-H202 对甲苯的去除率会降低。
