Hydrogen generation by alcohol reforming in a tandem cell consisting of a coupled fuel cell and electrolyser
Hydrogen generation by alcohol reforming in a tandem cell consisting of a coupled fuel cell and electrolyser
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DOI：
10.1016/j.ijhydene.2020.01.123
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发表时间：
2020-03
影响因子：
7.2
通讯作者：
K. Zakaria;Ravikumar Thimmappa;M. Mamlouk;K. Scott
中科院分区：
文献类型：
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作者：
K. Zakaria;Ravikumar Thimmappa;M. Mamlouk;K. Scott
描述了一种无需外部电能输入即可通过电重整醇（甲醇、乙醇和甘油）生产氢气的新型电重整器的性能。该串联电池由直接连接到酒精重整器的酒精燃料电池组成，无需外部供电，从而降低了运行和安装成本。串联电池使用基于聚合物电解质膜（PEM）的燃料电池和电解槽。在 80 °C 下，通过串联 PEM 电池在电流密度高于 200 mA cm−2 的情况下从甲醇中产生氢气，无需使用外部电源。在此条件下，能量输入（由燃料电池组件提供）为 0.91 kWh/Nm3 时，电重整器电压为 0.32 V；即，在任何外部电源的电能输入为零的情况下，水电解制氢的理论值 (4.7 kWh/Nm3) 低于 20%。氢气产生率为6.2×10−4mol(H2)h−1。使用乙醇和甘油的串联电池的氢气产率比使用甲醇的串联电池低大约一个数量级。
The performance of a novel electro-reformer for the production of hydrogen by electro-reforming alcohols (methanol, ethanol and glycerol) without an external electrical energy input is described. This tandem cell consists of an alcohol fuel cell coupled directly to an alcohol reformer, negating the requirement for external electricity supply and thus reducing the cost of operation and installation. The tandem cell uses a polymer electrolyte membrane (PEM) based fuel cell and electrolyser. At 80 °C, hydrogen was generated from methanol, by the tandem PEM cell, at current densities above 200 mA cm−2, without using an external electricity supply. At this condition the electro-reformer voltage was 0.32 V at an energy input (supplied by the fuel cell component) of 0.91 kWh/Nm3; i.e. less than 20% of the theoretical value for hydrogen generation by water electrolysis (4.7 kWh/Nm3) with zero electrical energy input from any external power source. The hydrogen generation rate was 6.2 × 10−4mol (H2) h−1. The hydrogen production rate of the tandem cell with ethanol and glycerol was approximately an order of magnitude lower, than that with methanol.