Gas Automotive News Hydrogen has zero emissions and high weight-energy density, and is often regarded as a promising fuel of the future.
However, the low bulk density of this gas requires a large amount of space, posing challenges for efficient storage and transportation.
To solve these shortcomings, the hydrogen in the storage tank needs to be compressed to a pressure of 700-bar.
This is not only costly, but also easily causes safety problems.
, (Photo source: scifac.hku.hk) In order to popularize hydrogen-powered fuel cell vehicles (FCV), the U.S. Department of Energy (DOE) has set specific goals for hydrogen storage systems, that is, 6.
5% of the weight of hydrogen storage material should be hydrogen (weight storage capacity is 6.
5%), and one liter of storage material should hold 50 grams of hydrogen (volumetric storage capacity is 50 g L “ 1) to ensure that the vehicle can drive the appropriate mileage without consuming too much fuel.
, One strategy to achieve these goals is to develop porous adsorbent materials such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs).
The common feature of these materials is that they all have a porous structure that can effectively collect and store hydrogen.
This method also helps store hydrogen at lower pressures, such as within 100 bar.
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