基于火花放电等离子体部分氧化重整二甲醚制氢研究(英文)

Hydrogen production from partial oxidation of dimethyl ether by spark discharge plasma

应用自制的多级式等离子体富氢气体制备装置,进行了二甲醚部分氧化重整制氢实验。实验结果表明,常温常压下二甲醚的转化率和氢产率随占空比的增大先增大后减小,当占空比为80%时最大值分别为87.6%和39.4%。随着电源电压的增加,放电能量和持续时间逐渐增加,转化率和氢产率逐渐增加。当反应器采用保温措施或对反应物进行加湿时,转化率和氢产率均有明显提高,同时制氢能耗下降,热效率有一定提高。实验过程中附着在电极上的积炭主要是由于氧气不足造成,随空醚比的增大,积炭明显减少。

Experiments involving hydrogen production from dimethyl ether（DME） were performed with a multistage plasma converter at atmospheric pressure.The results of these experiments show that the DME conversion and H2 yield initially increase and then decrease with the pulse duty ratio increasing.The maximal values of the DME conversion and H2 yield are 87.6% and 39.4% at a pulse duty ratio of 80%,respectively.As the increase in voltage of the electric source,the conversion and H2 yield increase significantly,since both the spark energy and the resident time of a spark in chamber are enhanced.When the heat preservation configuration or humidifying reactant is employed,the DME conversion rate and the H2 yield are enhanced,while the energy consumption is much lower than standard situation at each discharge frequency and the thermal efficiency is enhanced.Owing to insufficient oxygen,the carbon deposit is formed on the electrodes.With the increase in the A/D ratio,the carbon deposit on both the electrodes is clearly reduced.