Plasma-catalysis technologies (PCTs) have the potential to control the emissions of volatile organic compounds, although their low-energy efficiency is a bottleneck for their practical applications. A plasma-catalyst reactor filled with a CeO2/γ-Al2O3 catalyst was developed to decompose toluene with a high-energy efficiency enhanced by the elevating reaction temperature. When the reaction temperature was raised from 50 °C to 250 °C, toluene conversion dramatically increased from 45.3% to 95.5% and the energy efficiency increased from 53.5 g/kWh to 113.0 g/kWh. Conversely, the toluene conversion using a thermal catalysis technology (TCT) exhibited a maximum of 16.7%. The activation energy of toluene decomposition using PCTs is 14.0 kJ/mol, which is far lower than those of toluene decomposition using TCTs, which implies that toluene decomposition using PCT differs from that using TCT. The experimental results revealed that the Ce3+/Ce4+ ratio decreased and Oads/Olatt ratio increased after the 40-h evaluation experiment, suggesting that CeO2 promoted the formation of the reactive oxygen species that is beneficial for toluene decomposition.

中文翻译：

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使用高温等离子体催化反应器高效分解甲苯。

等离子体催化技术（PCTs）具有控制挥发性有机化合物排放的潜力，尽管其低能效是其实际应用的瓶颈。开发了填充有CeO2 /γ-Al2O3催化剂的等离子体催化剂反应器，以分解甲苯，并通过提高反应温度提高了高能效。当反应温度从50°C升高到250°C时，甲苯转化率从45.3％显着增加到95.5％，能量效率从53.5 g / kWh增加到113.0 g / kWh。相反，使用热催化技术（TCT）的甲苯转化率最高显示为16.7％。使用PCT分解甲苯的活化能为14.0 kJ / mol，远低于使用TCT分解甲苯的活化能，这意味着使用PCT进行的甲苯分解与使用TCT进行的甲苯分解不同。实验结果表明，经过40 h的评估实验，Ce3 + / Ce4 +的比例降低，Oads / Olatt的比例升高，表明CeO2促进了活性氧的形成，有利于甲苯的分解。