Low pressure, low cost hydrogen storage technology

目前绿色制氢和储氢主要围绕高压储氢电解槽技术展开。然而，电解槽使用的是稀土金属，如Ir。材料短缺意味着每年只能支持3-7.5GW的电解槽规模。这也与政府减少稀缺材料利用的使命背道而驰。该存储元件面向运输应用，例如用于运输的氢气加油，在这些应用中，高压压缩存储主导了当前技术，以满足车辆的能量密度要求。将氢气压缩到350或700巴作为加气站需要耗费大量能量。然而，除了运输业外，氢气还有许多用途。人们一直在谈论在天然气供应系统中添加高达20%的氢气。HyDeploy刚刚完成了一项被宣布为“成功”的试验，并在基尔大学试验了20%的H2混合物。这5家天然气网络运营商显然都宣布，他们已经为这一过渡做好了准备。然而，住宅的压力可能在75mbar到2bar之间，比高压系统的350到700bar低了一大步。如果随后使用的是低压系统，那么产生氢气然后将其压缩到高压是没有意义的。从能源的角度来看，在低压下储存氢气并避免往返的能源成本和压缩机和水箱的财务成本更有意义。市场上没有低压低成本的储氢产品。交付内容-了解低压储氢背后的基础科学-使用可持续性原则设计低压储氢系统-为验证技术而生产的小型试验台和仪器-分析测试结果以检查适合性和耐用性

Currently green hydrogen production and storage is focused primarily around electrolyser technology with high pressure storage. However, Electrolysers use rare earth metals such as Iridium. Material scarcity means there is only support for 3-7.5GW of electrolyser scale up annually. This also goes against the government mandate to reduce scarce material utilisation. The storage element is geared towards transport applications, such as hydrogen refuelling for transportation, where high pressure compressed storage has dominated current technology to meet energy density requirements for vehicles. To compress hydrogen to 350 or 700bar for a refuelling station requires a lot of energy.However, there are many uses for hydrogen aside from the transportation industry. There has been talk of adding Hydrogen to the gas supply system of up to 20%. HyDeploy has just concluded which was declared a "success" and trialed 20% H2 mix at Keele University. The 5 gas network operators have all apparently declared they are ready for this transition. However, pressures to domestic premises can be between 75mBar and 2Bar, a big step down from the 350-700Bar of a high pressure system. It makes little sense to generate hydrogen and then compress this to high pressures if the subsequent usage is low pressure systems. It makes more sense from an energy perspective to store the hydrogen at low pressures and avoid the round trip energy cost and the financial cost of the compressors and tanks. There is no low-pressure low-cost, hydrogen storage products on the market.Deliverables-Understanding the fundamental science behind low pressure hydrogen storage-Designing low pressure hydrogen storage systems using sustainability principles-Small scale test rig and instrumentation produced for validating technology-Test results analysed to check suitability and durability