Senior Research Engineer
09:45 - 10:15
Wednesday, 18 September 2019
T3.3 Low-Cost Hydrogen Storage Technology for Large Scale Energy Transport
Our world needs a sustainable and new energy. Hydrogen can lead us to a sustainable and clean energy society with much less greenhouse gas and particulate matter emissions. Producing hydrogen from renewable energy would be the most cost competitive way in the near future. Due to the regional disparities of the renewable energy availability, the international renewable hydrogen market will emerge. The development of low-cost hydrogen storage technology would be one of the biggest technical challenges for long distance and large scale transport of hydrogen. South Korea and Japan have a plan to import hydrogen from overseas and Australia is planning to export renewable hydrogen. When South Korea imports hydrogen from Australia, it is estimated that 60~70% of the imported hydrogen cost is from the storage and transport. For this reason, hydrogen storage technology is very essential for large scale and long distant transport and various approaches for developing the hydrogen storage technology have been explored. KOGAS is also developing low-cost hydrogen storage technology for large scale energy transport to secure technology enabling the supply of hydrogen with low cost.
The LOHC(liquid organic hydrogen carriers) is known as most promising hydrogen storage material, due to the high hydrogen content, reversibility and commercial availability. Cycloalkane compounds, especially benzene derivatives are easily available with low cost and have high hydrogen storage capacity and compatibility with existing gasoline infrastructure. Benzene derivatives have relatively lower dehydrogenation energy than alkane hydrocarbon compounds but still require high energy. KOGAS is researching to overcome this technical barrier.
The incorporation of heteroatoms into LOHCs reduces the dehydrogenation energy. In case the heteroatoms are boron and nitrogen the compound is also called CBN(carbon boron nitrogen). KOGAS is developing CBN based hydrogen storage material with extremely low dehydrogenation energy. KOGAS is developing hydrogenation and dehydrogenation catalyst for the CBN materials.
KOGAS is also applying computational chemistry tools for the development of hydrogen storage materials. DFT(density functional theory) based simulation was carried out for the estimation of thermochemical properties like enthalpies of dehydrogenation for various LOHC based hydrogen storage materials. This computational simulation can reduce effort in the screening of candidate LOHCs among many components and help to study the mechanism of catalytic dehydrogenation reaction.
KOGAS will improve these research works to commercialize the low-cost hydrogen storage technology for the coming hydrogen economy.