物理化学学报 >> 2002, Vol. 18 >> Issue (03): 276-278.doi: 10.3866/PKU.WHXB20020318

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等离子体甲烷偶联体系中纯氢气放电消除积炭

崔锦华;许根慧;韩森   

  1. 天津大学化工学院　一碳化工国家重点实验室,天津　300072
  • 收稿日期:2001-08-22 修回日期:2001-10-30 发布日期:2002-03-15
  • 通讯作者: 许根慧 E-mail:jean@tju.edu.cn

Eliminating Coke Formed in CH4 Coupling under Plasma via Pure H2 Discharge in the System

Cui Jin-Hua;Xu Gen-Hui;Han Sen   

  1. The State Key Laboratory of C1 Chemical Techniques,Chemical Engineering School,Tianjin University,Tianjin　300072
  • Received:2001-08-22 Revised:2001-10-30 Published:2002-03-15
  • Contact: Xu Gen-Hui E-mail:jean@tju.edu.cn

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摘要： 发现了等离子条件下甲烷偶联反应中形成的积炭可以通过该体系中纯氢气放电而消除.将消除积炭使用直流电场的正高压和负高压与使用交流电场作了比较，发现直流电场中无论使用正高压还是负高压，只有阴极上的积炭可以被消除，而交流电场中两极积炭均可被消除，反应器壁上的积炭在以上任何情况下均可被消除.基于实验事实提出了机理假设.消除积炭的量与输入功率、反应器对电极的直径比以及电极材料有关.

关键词: 消除积炭, 甲烷偶联, 等离子体

Abstract: It has been discovered that the coke formed in CH4 coupling under plasma can be eliminated via pure H2 discharge in the system.Eliminating coke under plasma with positive or negative high voltage in DC electric field has been compared with that in AC field.The elimination of coke takes place only on the negative of the two electrodes in DC field,while on both electrodes in AC field.The coke on the reactor walls can be eliminated with either positive or negative high voltage and in either DC or AC field.Based on the experimental facts,hypotheses of the reaction mechanism are suggested.Quantity of eliminating coke depends on diametrical ratio between reactor and the electrode,input power and electrode materials.

Key words: Eliminating coke, CH4 coupling, Plasma