Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"MgH2"”.
-
Hydrogen desorption and absorption for activated magnesium hydride
The interaction between MgH2 and LiBH4 was studied to determine the resultant effects on hydrogen desorption and absorption kinetics for potential use as a hydrogen storage material. It is found that the addition of LiBH4 in small molar ratios results in improved kinetics of the same order as those …
-
Direct 3D and in situ characterization of light metal hydrides for hydrogen storage
… and dispersion of Ni catalyst particles in MgH2 as a function of high-energy ball-milling duration. Electron tomography was applied to determine the three-dimensional catalyst dispersion. It was found that the Ni catalyst is transformed into the intermetallic compound Mg2NiH4 with increasing …
-
CARBON STRUCTURES AND Mg-BASED MATERIALS FOR GAS SORPTION
… PC was mixed as an additive with 20h-milled MgH2/TiC for improvement of hydrogen storage properties. RSM optimized the mixing time and the content of PC in the (MgH2/TiC + PC) composite. The results demonstrated that both mixing time and the content of plasma carbon (PC) significantly …
-
Modifizierung der Werkstoffe auf Basis von Magnesiumsilicid mit Hilfe der Spark-Plasma-Synthese
… SPS-Technik aus kugelgemahlenen Pulvergemischen (MgH2, Si, X). Die ternären Phasen Li2xMg2−xX (X = Si, Ge, Sn, Pb) Der Einbau von Li in Mg2Si wurde in dieser Arbeit erstmalig durch die SPS-Festkörperreaktion aus LiH, MgH2 und Si untersucht. Die Synthese der Li-armen Li2xMg2−xSi-Phasen gelingt …
-
Thermodynamics and kinetics of hydrogen storage in magnesium hydride: a theoretical study of catalyst-dopant, defect, and size effects
… their high capacity, light-metal hydrides – like MgH2 – remain under scrutiny as reversible H-storage materials. A key question persists: Is there a means to enhance the hydrogen desorption/adsorption properties of this “simple” hydride by decreasing size (e.g., creating nano-sized particles by …
-
Destabilization of lithium borohydride with additions of magnesium hydride
… release hydrogen in two stages, firstly from MgH2 (275 - 350°C) then secondly from LiBH4 (315 - 450°C). The desorption temperature was found to increase with increasing amounts of LiBH4. No MgB2 or LiH was detected in the desorption products of samples dehydrogenated up to 450°C under 3 bar of …
-
Estudio teórico de las propiedades de almacenamiento de hidrógeno en nanotubos funcionalizados e hidruros de Mg
… es hidruro de magnesio dopado con niobio (MgH2+Nb) con vacancias cargadas. Se analizaron los cambios estructurales, magnéticos y energéticos. En una segunda parte, se analizó el efecto de la adsorción de distintos metales alcalinos sobre nanotubos de carbono de pared simple (8,0) prístinos …
-
Dispersion and Integration of Dopants by Mechanical Alloying in Complex Hydrogen Storage Materials
Prior work had found that MgH2, a thermodynamically hindered system, can be destabilized through the introduction of Si but no microstructural information has been presented. In this work, confirmation of the proposed forward dehydriding mechanism to Mg2Si was obtained in the MgH 2 + Si system …