Deblending and purification of hydrogen from natural gas mixtures using the electrochemical hydrogen pump
Deblending and purification of hydrogen from natural gas mixtures using the electrochemical hydrogen pump
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DOI：
10.1016/j.ijhydene.2023.05.065
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发表时间：
2023-05
影响因子：
7.2
通讯作者：
C. Jackson;Graham Smith;A. Kucernak
中科院分区：
文献类型：
--
作者：
C. Jackson;Graham Smith;A. Kucernak
这项工作评估了电化学氢泵（EHP）用于天然气（NG）电网中的H2脱混，用于需要满足高ISO 14687-2019-D纯度标准的H2加气站。在0.2和0.3 A cm−2的电流密度下，测试了CH 4或NG中20、50和80% H2的浓度。此外，添加O2和O2/O3泄漏到入口EHP进料的影响进行了研究，以减轻中毒的EHP催化剂的有效性。使用0.3 A cm−2的NG（20-80% H2）或80% H2（0.2 A cm−2）时，满足<100 μmol mol− 1的CH 4浓度要求;但是，由于Nafion®中CO2的高渗透性，无法满足<2 μmol mol− 1的CO2限值。此外，当在0.3 A cm−2的NG中使用80% H2时，可以满足<2 μmol mol− 1的其他烃浓度限值。此外，EHP表现出低能耗，特别是在0.2 A cm− 2时，范围为3.5至12.5 kWh kgH 2 −1。
This work evaluates the use of Electrochemical Hydrogen Pumps (EHPs) for H2deblending from natural gas (NG) grids for use in H2refuelling stations which need to meet the high ISO 14687-2019-D purity standards. Concentrations of 20, 50 and 80% H2in either CH4or NG were tested at current densities of 0.2 and 0.3 A cm−2. Moreover, the impact of adding O2and O2/O3bleeds to the inlet EHP feeds were investigated for their effectiveness in mitigating poisoning of the EHP catalysts. The CH4concentration requirement of <100 μmol mol−1was met using NG at 0.3 A cm−2(20–80% H2) or with 80% H2at 0.2 A cm−2; however, the CO2limit of <2 μmol mol−1could not be met, due to the high permeability of CO2in Nafion®. Moreover, the other hydrocarbon concentrations limit of <2 μmol mol−1could be met when operating with 80% H2in NG at 0.3 A cm−2. Additionally, the EHP demonstrated low energy consumption, particularly at 0.2 A cm−2ranging from 3.5 to 12.5 kWh kgH2−1.