Akademik Veri Yönetim Sistemi
4th International Hydrogen Technologies Congress, Edirne, Türkiye, 20 - 22 Haziran 2019, ss.58
Hydrogen is considered to be a
promising next-generation energy source due to its high heat
value and
possible generation from renewable
sources.
hydrogen can be stored traditionally in pressurized
tanks, by
adsorption on high surface area, nanostructured
materials (activated
carbon, carbon
nanotubes, metal organic frameworks (MOFs), etc.) and hydrogen
storing alloys, but all of these methods have
some drawbacks such as low volumetric and gravimetric storage, high energy
consumption, and
safety considerations. Chemical hydrides (NaBH4, NaH,
LiH, KBH4, NaAlH4, etc.) are promising candidates for
pure hydrogen production and stored at room temperature. Because the adsorption
and desorption kinetics of these chemical
hydrides are fast enough to provide continuous H2 supply and
transportation of hydrogen containing media is possible at close to atmospheric
temperature and pressure conditions. Among them, sodium borohydride (NaBH4) is the
most advantageous hydride due to its different properties such as high hydrogen
capacity (10.8 wt.%), non-flammability, non-toxicity and stability
in alkaline
media. he
alkaline sodium borohydride solution can only be hydrolyzed in the presence of
suitable catalysts, and many studies have been done
to find the suitable catalysis.
In
the present work, new and efficient Nickel-Titanium Boride (Ni-Ti-B) catalysts
will be developed for catalytic hydrolysis reaction of alkaline NaBH4
solution. Hydrogen generation rate will be measured using the ternary Ni-Ti-B
catalyst as a function of different Ti concentration, solution temprature, NaBH4
concentration, and NaOH (a base-stabilizer) concentration. The performance of
the system will be analyzed from themodynamic points of view and will be
compared with the pristine Co-B catalysts.