Effect of additives on hydrogen release reactivity of magnesium hydride composites

E. Markman; L. Luzzatto-Shukrun; Y. S. Levy; I. Pri-Bar; Y. Gelbstein

doi:10.1016/j.ijhydene.2022.07.025

Effect of additives on hydrogen release reactivity of magnesium hydride composites

E. Markman, L. Luzzatto-Shukrun, Y. S. Levy, I. Pri-Bar, Y. Gelbstein

Department of Materials Engineering

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

Abstract

Magnesium hydride, a compound potentially applicable as a hydrogen carrier and energy storage material, releases hydrogen via hydrolysis or thermolysis. Ball-milled MgH₂ composites were studied to optimize the kinetics and yield of the dehydriding process. Milling MgH₂, under inert atmosphere increased the susceptibility to oxidation: the amount of MgO produced following air exposure of pulverized MgH₂ was found to be proportional to the milling duration. Incorporation of protective coatings to avoid undesirable oxidation was studied: addition of anionic surfactants or expanded graphite as milling aids reduces the susceptibility of MgH₂ to oxidation, presumably via formation of a protective layer. Such coatings minimize the access of oxygen to the particle surface upon exposure to air and facilitate manipulations, such as performing analysis, under ambient atmosphere. Improved dehydriding efficiency of oxidation-protected milled composites was demonstrated. Hydrolysis of pristine magnesium hydride and MgH₂-composites with aqueous hydrolysates containing aprotic polar solvents demonstrated a significant increase of dehydriding efficiency.

Original language	American English
Pages (from-to)	31381-31394
Number of pages	14
Journal	International Journal of Hydrogen Energy
Volume	47
Issue number	73
DOIs	https://doi.org/10.1016/j.ijhydene.2022.07.025
State	Published - 26 Aug 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Ball-milled magnesium hydride composites
Hydrolysates containing aprotic polar solvents
MgH dehydriding kinetics
MgH surface air oxidation
Surfactant and expanded graphite milling-aid additives

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

Access to Document

10.1016/j.ijhydene.2022.07.025

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title = "Effect of additives on hydrogen release reactivity of magnesium hydride composites",

abstract = "Magnesium hydride, a compound potentially applicable as a hydrogen carrier and energy storage material, releases hydrogen via hydrolysis or thermolysis. Ball-milled MgH2 composites were studied to optimize the kinetics and yield of the dehydriding process. Milling MgH2, under inert atmosphere increased the susceptibility to oxidation: the amount of MgO produced following air exposure of pulverized MgH2 was found to be proportional to the milling duration. Incorporation of protective coatings to avoid undesirable oxidation was studied: addition of anionic surfactants or expanded graphite as milling aids reduces the susceptibility of MgH2 to oxidation, presumably via formation of a protective layer. Such coatings minimize the access of oxygen to the particle surface upon exposure to air and facilitate manipulations, such as performing analysis, under ambient atmosphere. Improved dehydriding efficiency of oxidation-protected milled composites was demonstrated. Hydrolysis of pristine magnesium hydride and MgH2-composites with aqueous hydrolysates containing aprotic polar solvents demonstrated a significant increase of dehydriding efficiency.",

keywords = "Ball-milled magnesium hydride composites, Hydrolysates containing aprotic polar solvents, MgH dehydriding kinetics, MgH surface air oxidation, Surfactant and expanded graphite milling-aid additives",

author = "E. Markman and L. Luzzatto-Shukrun and Levy, \{Y. S.\} and I. Pri-Bar and Y. Gelbstein",

note = "Funding Information: This work was supported by the Ministry of Energy, Goverment of Israel (Grant number 220-11-050). We want to thank Mr. Y. Weinberg and Mr. E. Ayalon for outstanding contribution to the development and the maintenance of our instrumentation. Funding Information: This work was supported by the Ministry of Energy , Goverment of Israel (Grant number 220-11-050). Publisher Copyright: {\textcopyright} 2022 Hydrogen Energy Publications LLC",

year = "2022",

month = aug,

day = "26",

doi = "10.1016/j.ijhydene.2022.07.025",

language = "American English",

volume = "47",

pages = "31381--31394",

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AU - Markman, E.

AU - Luzzatto-Shukrun, L.

AU - Levy, Y. S.

AU - Pri-Bar, I.

AU - Gelbstein, Y.

N1 - Funding Information: This work was supported by the Ministry of Energy, Goverment of Israel (Grant number 220-11-050). We want to thank Mr. Y. Weinberg and Mr. E. Ayalon for outstanding contribution to the development and the maintenance of our instrumentation. Funding Information: This work was supported by the Ministry of Energy , Goverment of Israel (Grant number 220-11-050). Publisher Copyright: © 2022 Hydrogen Energy Publications LLC

PY - 2022/8/26

Y1 - 2022/8/26

N2 - Magnesium hydride, a compound potentially applicable as a hydrogen carrier and energy storage material, releases hydrogen via hydrolysis or thermolysis. Ball-milled MgH2 composites were studied to optimize the kinetics and yield of the dehydriding process. Milling MgH2, under inert atmosphere increased the susceptibility to oxidation: the amount of MgO produced following air exposure of pulverized MgH2 was found to be proportional to the milling duration. Incorporation of protective coatings to avoid undesirable oxidation was studied: addition of anionic surfactants or expanded graphite as milling aids reduces the susceptibility of MgH2 to oxidation, presumably via formation of a protective layer. Such coatings minimize the access of oxygen to the particle surface upon exposure to air and facilitate manipulations, such as performing analysis, under ambient atmosphere. Improved dehydriding efficiency of oxidation-protected milled composites was demonstrated. Hydrolysis of pristine magnesium hydride and MgH2-composites with aqueous hydrolysates containing aprotic polar solvents demonstrated a significant increase of dehydriding efficiency.

AB - Magnesium hydride, a compound potentially applicable as a hydrogen carrier and energy storage material, releases hydrogen via hydrolysis or thermolysis. Ball-milled MgH2 composites were studied to optimize the kinetics and yield of the dehydriding process. Milling MgH2, under inert atmosphere increased the susceptibility to oxidation: the amount of MgO produced following air exposure of pulverized MgH2 was found to be proportional to the milling duration. Incorporation of protective coatings to avoid undesirable oxidation was studied: addition of anionic surfactants or expanded graphite as milling aids reduces the susceptibility of MgH2 to oxidation, presumably via formation of a protective layer. Such coatings minimize the access of oxygen to the particle surface upon exposure to air and facilitate manipulations, such as performing analysis, under ambient atmosphere. Improved dehydriding efficiency of oxidation-protected milled composites was demonstrated. Hydrolysis of pristine magnesium hydride and MgH2-composites with aqueous hydrolysates containing aprotic polar solvents demonstrated a significant increase of dehydriding efficiency.

KW - Ball-milled magnesium hydride composites

KW - Hydrolysates containing aprotic polar solvents

KW - MgH dehydriding kinetics

KW - MgH surface air oxidation

KW - Surfactant and expanded graphite milling-aid additives

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DO - 10.1016/j.ijhydene.2022.07.025

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 73

ER -

Effect of additives on hydrogen release reactivity of magnesium hydride composites

Abstract

UN SDGs

Keywords

All Science Journal Classification (ASJC) codes

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