等离子体甲烷偶联体系中纯氢气放电消除积炭(英文)

Eliminating Coke Formed in CH_4 Coupling under Plasma via Pure H_2 Discharge in the System

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.

It has been discovered that the coke formed in CH4 coupling under plasma can be eliminated via pure H-2 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.