Hydrogen Absorpsivity-Desorbsivity of Mg Doped by Ni, Cu, Al Produced by Mechanical Alloying

Widyastuti Widyastuti; Budi P. Febrian; Sutarsis Sutarsis

doi:10.4028/www.scientific.net/AMR.789.37

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 789Hydrogen Absorpsivity-Desorbsivity of Mg Doped by...

Hydrogen Absorpsivity-Desorbsivity of Mg Doped by Ni, Cu, Al Produced by Mechanical Alloying

Abstract:

Mg, in the form of MgH_2, is one kinds of materials widely used as hydrogen storage materials. Absorption and desorption properties of hydrogen which comes from metal hydride depend on materials itself, addition of elements, as well as manufacturing method. In this research, Mg as hydrogen storage were prepared by mechanical alloying with Ni, Cu, and Al as element addition and variation milling time for 10, 20 and 30 hours. Some morphological analyses (XRD, SEM) were done to observe phase transformation. Absorption and desorption properties characterization were employed by DSC and hydrogenation tests. The improvement in milling time decreased particle size, therefore enhanced wt% of absorbed hydrogen and decrease onset desorption temperature. However, the excessive of agglomeration and cold welding on mechanical alloying process resulted in bigger particle size. Alloying elements, Al and Cu, served as catalyst, while Ni acted as alloying which reacted with hydrogen. Mg10wt%Al with 20 hours milling time at hydrogenation temperature 250°C, 3 atm pressure, and 1 hour holding time resulted in the highest weight percent of H₂ (0.38%wt). However, Mg10wt%Al with 30 hours milling time had the lowest onset temperature, 341.49°C

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Periodical:

Advanced Materials Research (Volume 789)

Pages:

37-41

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.789.37

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Online since:

September 2013

Authors:

Widyastuti Widyastuti, Budi P. Febrian, Sutarsis Sutarsis

Keywords:

Absorption, Desorption, Hydrogen Storage Materials, Mechanical Alloying, Mg

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