摘要
The hydrogen absorption amount and kinetics of the slurry formed by suspending the MgNi alloy powder in liquid benzene were studied. It is discovered that hydrogen is absorbed by both the solid phase(alloy) and liquid phase(C 6H 6) and the hydrogen absorption rate varies with the temperature and the content of the Mg-Ni in the slurry. Most hydrogen absorption curves of the slurry fall into two regions, in which the mechanism of hydriding reaction in the slurry system is different. In the former region, the hydriding of the alloy proceeds with hydrogen diffusing through C 6H 6. The part in the second region is the outcome of the hydrogenation of C 6H 6. At 548 K and under the hydrogen pressure of 4.5 MPa the saturation capacity for the slurry of 80% C 6H 6(mass fraction)+20% MgNi(mass fraction) is 5.9% (mass fraction) hydrogen, which is 97% of the theoretic capacity of the slurry system. The hydride of the alloy MgNi, which is only the hydride of Mg 2Ni phase, Mg 2NiH 4, is an efficient catalyst for the hydrogenation of C 6H 6 into C 6H 12(C 6H 6+3H 2→C 6H 12) in the slurry system.
The hydrogen absorption amount and kinetics of the slurry formed by suspending the MgNi alloy powder in liquid benzene were studied. It is discovered that hydrogen is absorbed by both the solid phase(alloy) and liquid phase(C 6H 6) and the hydrogen absorption rate varies with the temperature and the content of the Mg-Ni in the slurry. Most hydrogen absorption curves of the slurry fall into two regions, in which the mechanism of hydriding reaction in the slurry system is different. In the former region, the hydriding of the alloy proceeds with hydrogen diffusing through C 6H 6. The part in the second region is the outcome of the hydrogenation of C 6H 6. At 548 K and under the hydrogen pressure of 4.5 MPa the saturation capacity for the slurry of 80% C 6H 6(mass fraction)+20% MgNi(mass fraction) is 5.9% (mass fraction) hydrogen, which is 97% of the theoretic capacity of the slurry system. The hydride of the alloy MgNi, which is only the hydride of Mg 2Ni phase, Mg 2NiH 4, is an efficient catalyst for the hydrogenation of C 6H 6 into C 6H 12(C 6H 6+3H 2→C 6H 12) in the slurry system.
出处
《中国有色金属学会会刊：英文版》
CSCD
2003年第1期29-32,共4页
Transactions of Nonferrous Metals Society of China
基金
Project(G2 0 0 0 0 2 6 40 6)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgramofChina
Project( 5 0 0 710 5 3)supportedbytheNationalNaturalScienceFoundationofChina
