Vermaak Leandri, Neomagus Hein W J P, Bessarabov Dmitri G
HySA Infrastructure Centre of Competence, Faculty of Engineering, Potchefstroom Campus, North-West University, Potchefstroom 2520, South Africa.
Centre of Excellence in Carbon Based Fuels, Faculty of Engineering, Potchefstroom Campus, School of Chemical and Minerals Engineering, North-West University, Potchefstroom 2520, South Africa.
Membranes (Basel). 2021 Feb 13;11(2):127. doi: 10.3390/membranes11020127.
In this paper an overview of commercial hydrogen separation technologies is given. These technologies are discussed and compared-with a detailed discussion on membrane-based technologies. An emerging and promising novel hydrogen separation technology, namely, electrochemical hydrogen separation (EHS) is reviewed in detail. EHS has many advantages over conventional separation systems (e.g., it is not energy intensive, it is environmentally-friendly with near-zero pollutants, it is known for its silent operation, and, the greatest advantage, simultaneous compression and purification can be achieved in a one-step operation). Therefore, the focus of this review is to survey open literature and research conducted to date on EHS. Current technological advances in the field of EHS that have been made are highlighted. In the conclusion, literature gaps and aspects of electrochemical hydrogen separation, that require further research, are also highlighted. Currently, the cost factor, lack of adequate understanding of the degradation mechanisms related to this technology, and the fact that certain aspects of this technology are as yet unexplored (e.g., simultaneous hydrogen separation and compression) all hinder its widespread application. In future research, some attention could be given to the aforementioned factors and emerging technologies, such as ceramic proton conductors and solid acids.
本文对商业氢分离技术进行了概述。对这些技术进行了讨论和比较，并对基于膜的技术进行了详细讨论。详细综述了一种新兴且有前景的新型氢分离技术，即电化学氢分离（EHS）。与传统分离系统相比，EHS具有许多优势（例如，它不耗能，对环境友好，污染物接近零排放，以安静运行著称，最大的优势是可在一步操作中同时实现压缩和纯化）。因此，本综述的重点是调研迄今为止关于EHS的公开文献和研究。突出了EHS领域目前取得的技术进展。在结论部分，还强调了文献空白以及电化学氢分离中需要进一步研究的方面。目前，成本因素、对与该技术相关的降解机制缺乏充分了解，以及该技术的某些方面尚未得到探索（例如，同时进行氢分离和压缩），所有这些都阻碍了其广泛应用。在未来的研究中，可以关注上述因素以及新兴技术，如陶瓷质子导体和固体酸。
