Here is a promising forward-looking article by Mark Newman at Sandvik regarding the future of power to gas using Hydrogen and energy storage. The take away is that a hydrogen-based economy is much more likely today than 15 years ago. The reason is the recent expansion of electricity generation via wind turbines and photovoltaic cells. According to the article, batteries have improved a great deal over the years but are unsuitable for most grid-scale applications over a long period of an electricity outage. So far, pumped hydro plants have represented the standard for grid-scale energy storage, but it is only available in some locations due to its dependence on suitable geography.
This is where hydrogen comes in, writes Mark Newman: "Like electricity, hydrogen is an energy carrier as opposed to fuel, since it needs to be manufactured. The fuel, in this case, is the wind or the sun which is used to make electricity that splits water into hydrogen and oxygen via electrolysis. The part that I think is key is the fact that hydrogen doesn't always need to be used in conjunction with fuel cells in order to make electricity again when a demand peak occurs, but can instead be added into the natural gas grid and mixed with methane and be used in the same way as the methane would be used. There are numerous projects being undertaken around the world to investigate the feasibility and limits to doing this, for example, in Leeds, UK, and in Sydney, Australia, to mention just two."
"It very much looks as if the stars are aligning behind hydrogen. Some market assessments conservatively put growth rates in high single figures, but some large and credible companies are openly saying these estimates are much too low. Some have said the truth is more likely to be close to 10-fold growth by 2050."
Source: Full article LINK
