Zhang Xiuqin, Lin Qiubao, Liu Huiying, Chen Xiaowei, Su Sunqing, Ni Meng
Department of Physics, Jimei University, Xiamen 361021, China.
Department of Building and Real Estate, The Hong Kong Polytechnic University, Hong Kong, China.
Entropy (Basel). 2019 Jan 18;21(1):85. doi: 10.3390/e21010085.
External chemical reactors for steam reforming and water gas shift reactions are needed for a proton exchange membrane (PEM) fuel cell system using syngas fuel. For the preheating of syngas and stable steam reforming reaction at 600 °C, residual hydrogen from a fuel cell and a certain amount of additional syngas are burned. The combustion temperature is calculated and the molar ratio of the syngas into burner and steam reformer is determined. Based on thermodynamics and electrochemistry, the electric power density and energy conversion efficiency of a PEM fuel cell based syngas are expressed. The effects of the temperature, the hydrogen utilization factor at the anode, and the molar ratio of the syngas into burner and steam reformer on the performance of a PEM fuel cell are discussed. To achieve the maximum power density or efficiency, the key parameters are determined. This manuscript presents the detailed operating process of a PEM fuel cell, the allocation of the syngas for combustion and electric generation, and the feasibility of a PEM fuel cell using syngas.
对于使用合成气燃料的质子交换膜（PEM）燃料电池系统而言，需要用于蒸汽重整和水煤气变换反应的外部化学反应器。为了对合成气进行预热并在600°C下实现稳定的蒸汽重整反应，燃料电池中的残余氢气和一定量的额外合成气会被燃烧。计算燃烧温度，并确定进入燃烧器和蒸汽重整器的合成气的摩尔比。基于热力学和电化学原理，给出了基于合成气的PEM燃料电池的电功率密度和能量转换效率。讨论了温度、阳极处的氢气利用率以及进入燃烧器和蒸汽重整器的合成气的摩尔比对PEM燃料电池性能的影响。为了实现最大功率密度或效率，确定了关键参数。本文介绍了PEM燃料电池的详细运行过程、用于燃烧和发电的合成气分配情况以及使用合成气的PEM燃料电池的可行性。
