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 was found that the coke formed in the methane coupling reaction under plasma condition can be eliminated by the pure hydrogen gas discharge in the system.When the positive and negative high voltages of DC field were eliminated and compared with the AC field, Regardless of whether positive or negative high pressure is applied, only the carbon deposition on the cathode can be eliminated, and the coke deposition on both electrodes in the alternating current field can be eliminated, and the carbon deposition on the reactor wall can be eliminated in any of the above situations. The mechanism assumption is proposed.The amount of coke removal is related to the input power, the diameter ratio of the reactor to the electrode, and the electrode material.