Use of hydrogen involves the production, storage and transportation of hydrogen, the low density, difficult for storage and high-cost for transportation have become key factors that restrict the development of hydrogen energy，hydrogen storage and transport in liquid state has the following advantages:
ECONOMIC
Liquefied hydrogen density is about 800 times that of gaseous hydrogen. The same storage volume can store much more hydrogen. Liquefied hydrogen has a mass density of 14% and therefore storage in liquid state is of the highest storage density. Liquefied hydrogen can thus substantially save the cost of storage, transportation and operation.
EFFICIENT
In the process of hydrogen liquefaction, harmful impurities are solidified and freeze out. After gasification, hydrogen purity level can be 6-7N, thus effectively increasing the capacity and service life of hydrogen fuel cell.
SAFE
Hydrogen storage and transportation in liquid state is operated at low pressure of 1-1.3bar. Compared with compressed high pressure gas hydrogen storage, it is much safer.
