Hydrogen absorbing and releasing alloy material and application thereof

Abstract

The invention relates to a hydrogen absorbing and releasing alloy material with the formula of A(1-x)Bx, wherein A is at least one of Ti, Zr, Mg and rare-earth RE; B is at least one of Hf, Nb, Cr, Ca, Cu, Ni, Mo, Fe, Co, Al, Mn and Si; x is the mol ratio from 0.05 to 0.90; the rare-earth RE comprises at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and the usage temperature of the alloy is higher than 200 DEG C. Further, the invention relates to a hydrogen absorbing and releasing alloy material of an anti-phase splitting multicycle vacuum interlayer applied to the pollution control of the tail gas of motor vehicles. The hydrogen absorbing and releasing alloy has overstable capacity of anti-high temperature phase splitting and repeated hydrogen absorbing and releasing processes for ten thousand times and can be used for solving the problem of cold start pollution of the tail gas of vehicles or particle pollution of the tail gas of diesel engine road vehicles.

Description

technical field [0001] The present invention relates to the field of hydrogen storage alloys and the field of vacuum, more specifically, relates to a high-temperature phase-separation-resistant vacuum interlayer hydrogen absorption and desorption alloy material, which is applied to the pollution control of motor vehicle exhaust, and further said to be applied to the control of cold start pollution of automobile exhaust Or diesel vehicle exhaust particulate pollution control. Background technique [0002] A hydrogen storage alloy is a solid solution alloy or an intermetallic compound material that can reversibly absorb and release hydrogen at a certain temperature. Due to the reversible hydrogen absorption and desorption characteristics and hydrogen absorption and desorption thermal effects of hydrogen storage alloys, hydrogen storage alloys are usually used in nickel-metal hydride electrodes, heat pumps, heat exchange, thermal excitation, thermal energy storage, and temperat...

AI Technical Summary

Problems solved by technology

When necessary, the valve between the two is opened, and the high platform pressure alloy releases hydrogen, and at the same time absorbs the surrounding heat to achieve the purpose of cooling; the hydrogen reaches the low platform pressure alloy and is absorbed, because the alloy absorbs hydrogen and releases heat, so as to realize the purpose of rapid temperature rise of the catalyst , but this approach complicates the pollution control system

In addition, since the catalytic purification of automobile exhaust gas requires a high operating temperature environment (400-950 ° C), hydrogen storage alloys have problems such as alloy phase separation at high temperatures; after the alloy undergoes a number of hydrogen absorption and dehydrogenation cycles, the reversibility of the alloy deteriorates.

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