Preparation And Hydrolysis Hydrogen Production Properties Of The Al-Ga Alloy

For centuries, coal, oil, and other non-renewable resources to become a majorenergy supply is imminent, with the storage capacity of these non-renewableresources dwindling, people need to find a new energy to replace these traditionalenergy sources. Compared with traditional energy sources, new energy haslow-pollution, large reserves, etc. New energy technologies is considered to be thefourth technological revolution to change the world development.Although there are many new sources of energy, such as solar energy, windenergy, but these resources can not be stored like oil, result in the loss of a lot ofresources. Now need a energy with convenient storage and easy transport. Hydrogenis such an energy source. In recent years researchers all over the world did a lot ofresearch in hydrogen preparation and storage, including the rapid development of thehydrolysis of hydride, methanol and alloy.Aluminum, cheap, abundant, good save, and the hydrolysis reaction product Al(OH)3pollution-free, it is the material of perfect choice for hydrolysis hydrogenproduction, but the alumina protective film is easily generated in the surface layer ofpure aluminum when pure aluminum reacts with water, hindered aluminum furtherreacting with water. An effective method making continuous hydrolysis is thealuminum alloy processing. The activation of the aluminum alloy is mainly from threeareas:(1) the existence of the alloy phase is conducive to get rid of the Al2O3protective film;(2) doping the metal induce a negative shift of the aluminum electrodepotential, especially some low melting point metal, such as Bi, In, Sn, Ga, so that theelectrode potential of the aluminum is improved;(3) miniature corrosion cell isformed in the interior of the aluminum alloy.Al-Ga binary alloy and Al-Ga-In-Sn quaternary alloy were prepared byhigh-temperature vacuum annealing furnace and metal melting furnace, test the XRD,SEM and hydrogen production performance respectively, discuss the composition,temperature, annealing temperature and other factors which may effect the hydrogenproduction performance, the study found that Al-Ga alloy prepared by hightemperature annealing furnace is capable of hydrolyzing hydrogen production,but with a low hydrogen production rate and a little hydrogen production, when Gacontent is50%, even when the the hydrolysis temperature reaches60℃, themaximum hydrogen production rate is only87mL/g min, the maximum amount ishydrogen production is only9%; Al-Ga-In-Sn alloy prepared by high-temperaturevacuum annealing furnace have a water-strongly hydrolyzable hydrogen production,SEM characterization find that the microstructure of the alloy is rendered globular,when the Al content increased from50%to90%, all the alloy sample have a hydrogenproduction over90%, when the Al content is90%, hydrolysis temperature60℃, themaximum hydrogen production rate reached672mL/g min, the maximum hydrogenyield is96%. Al90-GA7-In2-Sn1alloy sample prepared by metal smelting furnacecould react with water to produce hydrogen, SEM characterization shows the samplemicrostructure, plate-like, hydrogen production curve is essentially a straight line,hydrogen production rate is essentially constant, can be sustained more than35min,and the hydrogen yield can reach94%. Alloy samples annealed at differenttemperatures, the maximum amount of hydrogen production decreased by94%to83%and the maximum hydrogen production rate decreased by68mL/g min to42mL/g min.