| Conversion of natural gas to C_2 hydrocarbons through dielectric-barrier discharge plasma catalysis |
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| 作者姓名： | 王保伟 许根慧 |
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| 作者单位： | WANG Baowei & XU GenhuiState Key Laboratory of C1 Chemical Technology，Tianjin University，Tianjin 300072，China |
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| 基金项目： | This work was supported by the Science and Technology Development from the SINOPEC (Grant No. X500005)，the National Natural Science Foundation of China (Grant No. 29776037). |
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| 摘 要： | The experiments are carried out in the system of continuous flow reactors with dielectric-barrier discharge (DBD) for studies on the conversion of natural gas to C2 hydrocarbons through plasma catalysis under the atmosphere pressure and room temperature. The influence of discharge frequency, structure of electrode, discharge voltage, number of electrode, ratio of H2/CH4, flow rate and catalyst on conversion of methane and selectivity of C2 hydrocarbons are investigated. At the same time, the reaction process is investigated. Higher conversion of methane and selectivity of C2 hydrocarbons are achieved and deposited carbons are eliminated by proper choice of parameters. The appropriate operation parameters in dielectric-barrier discharge plasma field are that the supply voltage is 20-40 kV (8.4-40 W), the frequency of power supply is 20 kHz, the structure of (b) electrode is suitable, and the flow of methane is 20-60 ml · min-1. The conversion of methane can reach 45%, the selectivity of C2 hydrocarbons i
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Conversion of natural gas to C2 hydrocarbons through dielectric-barrier discharge plasma catalysis |
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| WANG Baowei & XU GenhuiState Key Laboratory of C Chemical Technology,Tianjin University,Tianjin ,China.Conversion of natural gas to C_2 hydrocarbons through dielectric-barrier discharge plasma catalysis[J].Science in China(Chemistry),2002,45(3). |
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| Authors: | WANG Baowei & XU GenhuiState Key Laboratory of C Chemical Technology Tianjin University Tianjin China |
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| Institution: | State Key Laboratory of C1 Chemical Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | The experiments are carried out in the system of continuous flow reactors with dielectric-barrier discharge (DBD) for studies on the conversion of natural gas to C2 hydrocarbons through plasma catalysis under the atmosphere pressure and room temperature. The influence of discharge frequency, structure of electrode, discharge voltage, number of electrode, ratio of H2/CH4, flow rate and catalyst on conversion of methane and selectivity of C2 hydrocarbons are investigated. At the same time, the reaction process is investigated. Higher conversion of methane and selectivity of C2 hydrocarbons are achieved and deposited carbons are eliminated by proper choice of parameters. The appropriate operation parameters in dielectric-barrier discharge plasma field are that the supply voltage is 20-40 kV (8.4-40 W), the frequency of power supply is 20 kHz, the structure of (b) electrode is suitable, and the flow of methane is 20-60 mL@min?1. The conversion of methane can reach 45%, the selectivity of C2 hydrocarbons is 76%, and the total selectivity of C2 hydrocarbons and C3 hydrocarbons is nearly 100%. The conversion of methane increases with the increase of voltage and decreases with the flow of methane increase; the selectivity of C2 hydrocarbons decreases with the increase of voltage and increases with the flow of methane increase. The selectivity of C2 hydrocarbons is improved with catalyst for conversion of natural gas to C2 hydrocarbons in plasma field. Methane molecule collision with radicals is mainly responsible for product formation. |
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| Keywords: | natural gas dielectric-barrier discharge plasma C2 hydrocarbon |
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