Hydrogen
Mary Helen McCay, Shahin Shafiee
Abstract
From an energy perspective, hydrogen is a very interesting material. While it is the smallest molecule in the world with a very low volumetric energy density, it has a very high gravimetric energy density. Hydrogen can be utilized either directly as a fuel by enriching conventional fossil fuels or in fuel cells or indirectly as an energy carrier in energy storage systems. Consequently, it offers many advantages yet associated with many issues. This chapter starts with an introduction to hydrogen properties, possible applications, and problems. Then, it proceeds with discussion on its production, distribution, storage, and required education for successful utilization. To summarize, current status of hydrogen economy development in some countries is presented.