Stationary states of hydrogen‐producing reactions in nonequilibrium plasma
Stationary states of hydrogen‐producing reactions in nonequilibrium plasma
复制标题
非平衡等离子体中产氢反应的稳态
DOI：
10.1002/aic.17952
复制
发表时间：
2023
期刊：
影响因子：
3.7
通讯作者：
Thimsen, Elijah
中科院分区：
文献类型：
--
作者：
Chen, Xiaoshuang;Thimsen, Elijah
在这项工作中，探索了非平衡等离子体中制氢反应的定态，即水裂解和水煤气变换反应。对于这两个反应，在等离子体中的长停留时间从反应器的流出物被发现是独立的流入物形态。换句话说，向反应器进料0.1H2O或0.1H2+ 0.05O2（摩尔）产生相同的流出物组成，并且类似地，向反应器进料0.1CO + 0.1H2O产生与0.1CO2+ 0.1H2名义上相同的流出物。对于这两个反应，从等离子体的流出物被发现是非常远离局部平衡在总压力和背景温度的等离子体和相对于局部平衡形态的吸热方向移动。这项工作进一步表明，在等离子体化学过程中，必须特别注意复合区。复合区倾向于将气体成分从等离子体稳定状态驱动回到局部平衡。
In this work, stationary states of hydrogen‐producing reactions in nonequilibrium plasmas are explored, namely the water splitting and water gas shift reactions. For both reactions, the effluent from the reactor at long residence times in the plasma was found to be independent of the influent speciation. In other words, feeding the reactor either 0.1H2O or 0.1H2+ 0.05O2by mole produced the same effluent composition, and similarly, feeding the reactor 0.1CO + 0.1H2O produced nominally the same effluent as 0.1CO2+ 0.1H2. For both reactions, the effluent from the plasma was found to be very far from local equilibrium at the total pressure and background temperature of the plasma and shifted in the endothermic direction relative to the local equilibrium speciation. This work further demonstrates that special attention must be paid to the recombination zone in plasmachemical processes. The recombination zone tends to drive the gas composition from plasma stationary states back towards local equilibrium.