低温常压等离子体反应器用于低密度聚乙烯制氢
Nonthermal Atmospheric Plasma Reactors for Hydrogen Production from Low-Density Polyethylene
摘要：
氢气主要通过天然气重整或电化学水分解生产，使有机固体原料利用不足。由可再生电力驱动的等离子体技术可以实现塑料废物的可持续升级循环和绿色氢气的生产。在这项工作中，低温常压等离子体反应器的基础上转移弧（transarc）和滑动弧（glidarc）放电的设计，建造，其特征在于从低密度聚乙烯（LDPE）作为模型塑料废物产生氢气。实验结果表明，在两种反应器中，产氢速率和效率均随电压的增加而单调增加，transarc和glidarc反应器的最大产氢量分别为0.33和0.42 mmol/g LDPE。对于transarc反应器，更小的电极-原料间距有利于更大的氢气产量，而对于glidarc反应器，在中间流速下获得更大的氢气产量。尽管两个反应器之间的操作模式明显不同，但LDPE的氢气产量相当。
英文摘要：
Hydrogen is largely produced via natural gas reforming or electrochemical water-splitting, leaving organic solid feedstocks under-utilized. Plasma technology powered by renewable electricity can lead to the sustainable upcycling of plastic waste and production of green hydrogen. In this work, low-temperature atmospheric pressure plasma reactors based on transferred arc (transarc) and gliding arc (glidarc) discharges are designed, built, and characterized to produce hydrogen from low-density polyethylene (LDPE) as a model plastic waste. Experimental results show that hydrogen production rate and efficiency increase monotonically with increasing voltage level in both reactors, with the maximum hydrogen production of 0.33 and 0.42 mmol/g LDPE for transarc and glidarc reactors, respectively. For the transarc reactor, smaller electrode-feedstock spacing favors greater hydrogen production, whereas, for the glidarc reactor, greater hydrogen production is obtained at intermediate flow rates. The hydrogen production from LDPE is comparable despite the markedly different modes of operation between the two reactors.
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