Highly efficient decomposition of toluene using a high-temperature plasma-catalysis reactor
| Autor: | Hao Lu, Zhizong Chen, Chen Junxia, Hyun-Ha Kim, Boqiong Jiang, Tomohiro Nozaki, Bingqing Xu, Zuliang Wu, Xiujuan Tang, Shuiliang Yao, Yuchen Yuan, Wu Xinyue, Ruowen Zhou, Xie Han |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Hot Temperature
Environmental Engineering Plasma Gases Health Toxicology and Mutagenesis 0208 environmental biotechnology Inorganic chemistry 02 engineering and technology Activation energy 010501 environmental sciences 01 natural sciences Catalysis chemistry.chemical_compound Reaction temperature Aluminum Oxide Environmental Chemistry Toluene decomposition 0105 earth and related environmental sciences Air Pollutants Volatile Organic Compounds Public Health Environmental and Occupational Health Cerium General Medicine General Chemistry Plasma Models Theoretical Pollution Decomposition Toluene 020801 environmental engineering chemistry Oxidation-Reduction |
| Zdroj: | Chemosphere. 247 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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