1. Few chemicals carry as much hope and aspiration as hydrogen. Over the last few years, the first element in the periodic table has gone from a global buzzword to one of the most promising routes to decarbonizing industry, power generation and transport.
2. As production of the gas using low-carbon resources ramps up around the globe, the vision of a green hydrogen-powered economy faces a number of challenges. Alongside scaling production and lowering costs, one of the biggest challenges is hydrogen storage.
WHY IS HYDROGEN ENERGY STORAGE VITAL?
1. Hydrogen has the potential to address two major challenges in the global drive to achieve net zero emissions by 2050. First, it can help tackle the perennial issue of the intermittency of renewable energy sources such as wind and solar. By converting excess power generated on windy or sunny days into hydrogen, the gas can store renewable energy that can then be dispatched at times of peak demand as a clean fuel source for power generation. Second, hydrogen can replace fossil fuels to decarbonize sectors where electrification alone won’t suffice, such as domestic heating, industry, shipping and aviation.
2. The hitch is that, while an excellent medium for renewable energy storage, hydrogen itself is hard to store.
3. This is because it has a low volumetric energy density compared to other gases — such as natural gas — meaning it takes up significantly more space. Also, hydrogen has a boiling point close to absolute zero and requires cryogenic storage. And while it does not typically corrode storage containers, it can cause cracks in metals under certain conditions.
4. Here are four hydrogen storage solutions that could help address these challenges, as mapped out by Hydrogen Europe.