Good news! However, would it not be better to generate hydrogen from water?
Always remember the Hindenburg disaster of 1937!
"... Despite its potential for various real-world applications, hydrogen is often expensive to produce, store and safely transport to desired locations. Moreover, before it can be used, it typically needs to be purified, as hydrogen produced industrially is typically mixed with other gases, such as carbon monoxide (CO), carbon dioxide (CO₂), nitrogen (N₂) and light hydrocarbons. ...
Researchers ... recently devised a new strategy to separate hydrogen from impurities at low temperatures, while also enabling its safe storage and transportation. Their proposed method ... relies on a reversible chemical reaction between two organic compounds that act as hydrogen carriers, enabling the reversible absorption and release of hydrogen. ...
The strategy they proposed relies on a low-cost catalytic cycle, which involves the reversible interconversion of the compounds γ-butyrolactone (GBL) and 1,4-butanediol (BDO). ...
"Using crude hydrogen feeds with over 50 vol.% impurities, GBL is hydrogenated to BDO at 170 oC, achieving >99.2% H2-to-BDO selectivity while suppressing side reactions," ... "The hydrogen-rich BDO can then be safely stored and transported using existing liquid fuel infrastructure. Upon demand, catalytic dehydrogenation regenerates GBL and releases high-purity hydrogen (>99.998%), free of COx impurities." ...
used an inexpensive copper-based catalyst to capture hydrogen from impure industrial gas streams and store it in BDO, a cheap and safe oil-like liquid. Notably, this liquid can be transported using the same tanks, pipelines and trucks that are currently used to transport other fuels. When it reaches its destination, the hydrogen stored in the liquid can be easily released with high purity. ...
"A key advantage of our strategy is that both the catalyst and the liquid organic hydrogen carriers or LOHC (GBL/BDO) are abundant and inexpensive," ...
"Moreover, hydrogen capture and storage occur in a single step, simplifying the overall system. Our approach is safe and scalable ..."
From the abstract:
"Industrially, hydrogen production often relies on carbon-based resources, necessitating the separation of hydrogen from impurities such as CO, CO2, hydrocarbons and N2. Traditional purification methods involve complicated and energy-intensive sequential conversion and removal of these impurities.
Here we introduce a reversible catalytic cycle based on the interconversion between γ-butyrolactone and 1,4-butanediol over an inverse Al2O3/Cu catalyst, enabling efficient hydrogen separation and storage from crude hydrogen feeds. This process could transform crude hydrogen feeds containing over 50% impurities into pure hydrogen at low temperature.
The low impurity affinity and high dispersion of inverse Al2O3/Cu facilitate catalytic crude and waste hydrogen separations previously considered unachievable. This approach avoids the need for expensive pressure swing adsorption or membrane systems in liquid organic hydrogen carriers, showing great potential for large-scale applications in crude hydrogen or industrial tail gas utilization processes. By providing a low-risk, energy-efficient alternative, this strategy supports the global transition from grey/blue hydrogen to green hydrogen."
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