scholarly journals Hydrogen Desorption in Mg(BH4)2-Ca(BH4)2 System

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3230 ◽  
Author(s):  
Erika M. Dematteis ◽  
Marcello Baricco
Keyword(s):  
Thermal Decomposition ◽  
Solid State ◽  
Phase Stability ◽  
Hydrogen Desorption ◽  
Amorphous Phases ◽  
Pure Compounds ◽  
The Subject ◽  
Mechanical Mixtures ◽  
Calcium Borohydride ◽  
Nanocrystalline Phases

Magnesium borohydride, Mg(BH4)2, and calcium borohydride, Ca(BH4)2, are promising materials for hydrogen storage. Mixtures of different borohydrides have been the subject of numerous researches; however, the whole Mg(BH4)2-Ca(BH4)2 system has not been investigated yet. In this study, the phase stability and the hydrogen desorption were experimentally investigated in the Mg(BH4)2-Ca(BH4)2 system, by means of XRD, ATR-IR, and HP-DSC. Mg(BH4)2 and Ca(BH4)2 are fully immiscible in the solid state. In the mechanical mixtures, thermal decomposition occurs at slightly lower temperatures than for pure compounds. However, they originate products that cannot be identified by XRD, apart from Mg and MgH2. In fact, amorphous phases or mixtures of different poorly crystalline or nanocrystalline phases are formed, leading to a limited reversibility of the system.

scholarly journals Production of ceramics from coal fly ash

2012 ◽  
Vol 18 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Biljana Angjusheva ◽  
Emilija Fidancevska ◽  
Vojo Jovanov
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Solid State ◽  
Liquid Phase ◽  
Bending Strength ◽  
Coal Fly Ash ◽  
Liquid Phase Sintering ◽  
Heating Rates ◽  
Republic Of Macedonia ◽  
The Subject

Dense ceramics are produced from fly ash from REK Bitola, Republic of Macedonia. Four types of fly ash from electro filters and one from the collected zone with particles < 0.063 mm were the subject of this research. Consolidation was achieved by pressing (P= 133 MPa) and sintering (950, 1000, 1050 and 11000C and heating rates of 3 and 100/min). Densification was realized by liquid phase sintering and solid state reaction where diopside [Ca(Mg,Al)(Si,Al)2O6] was formed. Ceramics with optimal properties (porosity 2.96?0.5%, bending strength - 47.01?2 MPa, compressive strength - 170 ?5 MPa) was produced at 1100?C using the heating rate of 10?C/min.

From Coordination Complexes to Potential Heterogeneous Catalysts via Solid‐State Thermal Decomposition: Precursor, Atmosphere and Temperature as Tuning Variables

2019 ◽  
Vol 4 (28) ◽  
pp. 8365-8371
Author(s):  
José Pérez ◽  
José L. Serrano ◽  
Gregorio Sánchez ◽  
Pedro Lozano ◽  
Ivan da Silva ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Solid State ◽  
Heterogeneous Catalysts ◽  
Coordination Complexes

Solid-state transformations by thermal decomposition of [Co(en)3][Fe(C2O4)3] in an inert atmosphere

2020 ◽  
Vol 687 ◽  
pp. 178578
Author(s):  
D.P. Dоmоnоv ◽  
S.I. Pechenyuk ◽  
Yu.P. Semushina ◽  
G.I. Kadyrova
Keyword(s):  
Thermal Decomposition ◽  
Solid State ◽  
Inert Atmosphere

Life Cycle Assessment on the Effects of Parameter Setting in Direct Recycling Hot Press Forging of Aluminum

2018 ◽  
Vol 923 ◽  
pp. 143-148 ◽  
Author(s):  
Mohd Amri Lajis ◽  
Nur Kamilah Yusuf ◽  
Azlan Ahmad
Keyword(s):  
Solid State ◽  
Environmental Concern ◽  
Parameter Setting ◽  
Hot Press ◽  
Metallic Material ◽  
Forging Process ◽  
Global Environmental ◽  
The Subject ◽  
Metal Shaping ◽  
Recycling Techniques

Metallic material processing plays a significant role in terms of global environmental impact which contributes to the climate change phenomena that is a serious international environmental concern and the subject of much research and debate. Thus, energy-and resource-efficient strategies in the metal shaping technology domain need to be identified urgently. A frequent theme in the debates that surround waste and resources management is the extent to which the recycling of metallic materials offers genuine benefits to the environment. Solid state recycling techniques allow the manufacture of high density aluminum alloy parts directly from production scrap. In this paper the environmental impacts associated with ‘meltless’ scrap processing routes through hot press forging process with varying parameter has been studied. A comparative analysis has been performed, with different operating temperature and holding time of direct recycling hot press forging process AA6061 aluminum chip. The importance of an environmental performance analysis that included both parameter setting was discussed and highlighted throughout the paper. Finally, the application of the proposed parameter setup has resulted in the setting up of an eco-process. Indeed, LCA study on recycling (solid-state) are recommended as well it gives a noteworthy benefit to the environment and to fill the knowledge gap.

Fabrication, solid state characterization and bioavailability assessment of stable binary amorphous phases of Ritonavir with Quercetin

2015 ◽  
Vol 89 ◽  
pp. 329-338 ◽  
Author(s):  
Swapnil J. Dengale ◽  
Syed Sajjad Hussen ◽  
B.S.M. Krishna ◽  
Prashant B. Musmade ◽  
G. Gautham Shenoy ◽  
...  
Keyword(s):  
Solid State ◽  
Amorphous Phases ◽  
Solid State Characterization

scholarly journals The role of MgB12H12 in the hydrogen desorption process of Mg(BH4)2

2015 ◽  
Vol 51 (4) ◽  
pp. 700-702 ◽  
Author(s):  
Yigang Yan ◽  
Arndt Remhof ◽  
Daniel Rentsch ◽  
Andreas Züttel
Keyword(s):  
Solid State ◽  
Hydrogen Desorption ◽  
Decomposition Process ◽  
Desorption Process ◽  
Solid State Decomposition

Throughout the solid-state decomposition process of Mg(BH4)2, the MgB12H12 phase does not exist in the solid residues after decomposition.

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