Hydrogen generation by the hydrolysis of mechanochemically activated aluminum-tin-indium composites in pure water

Preez, S.P. du; Bessarabov, Dmitri

doi:10.1016/j.ijhydene.2018.09.133

Cited by 53 publications

(24 citation statements)

References 116 publications

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“…HySA Infrastructure (South Africa) has undertaken the fabrication of mechano-chemically processed Al composites using various activation compounds: bismuth, tin, and/or indium. These composites are highly reactive towards neutral pH water of various qualities (e.g., tap, filtered, deionized) [1][2][3][4][5]. Mechanochemical processing facilitates particle size reduction of the composite particles and the distribution of activation compounds throughout Al particles.…”

Section: Mechanochemically Processed Almentioning

confidence: 99%

Material Aspects Pertaining to Hydrogen Production from Aluminum: Opinion

Preez

2019

RDMS

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Section: Mechanochemically Processed Almentioning

confidence: 99%

Material Aspects Pertaining to Hydrogen Production from Aluminum: Opinion

Preez

2019

RDMS

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“…Although hydrogen is abundant on earth, it does not occur naturally in its pure form and has to be processed to be converted to an energy carrier [ 1 , 2 ]. Numerous processes are employed to produce hydrogen from various source materials, e.g., electrochemical, [ 3 ] photo-electrochemical, [ 4 , 5 ] photo-chemical, [ 6 ] photo-biological, [ 4 , 7 ] photo-catalytical, [ 4 , 8 ] partial hydrocarbons oxidation, [ 9 ] photo-thermochemical, [ 10 ] and niche and nanoparticle-assisted biological methods [ 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

On-Demand Hydrogen Generation by the Hydrolysis of Ball-Milled Aluminum–Bismuth–Zinc Composites

2022

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In this investigation, ternary Al-Bi-Zn composites were prepared through mechanochemical activation to determine the combined effects of low-cost Bi and Zn on the morphology change and reactivity of the Al composite during the hydrolysis reaction. Specifically, Zn was considered as a means to slow the hydrogen generation rate while preserving a high hydrogen yield. A steady hydrogen generation rate is preferred when coupled with a proton exchange membrane fuel cell (PEMFC). Scanning electron microscopy (SEM) analysis indicated that Bi and Zn were distributed relatively uniformly in Al particles. By doing so, galvanic coupling between anodic Al and the cathodic Bi/Zn sustains the hydrolysis reaction until the entire Al particle is consumed. X-ray diffraction analysis (XRD) showed no intermetallic phases between Al, Bi, and/or Zn formed. A composite containing 7.5 wt% Bi and 2.5 wt% Zn had a hydrogen yield of 99.5%, which was completed after approximately 2300 s. It was further found that the water quality used during hydrolysis could further slow the hydrogen generation rate.

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“…There are several paths for hydrogen production, e.g., fossil fuel reforming, coal and biomass gasification, water splitting, ethanol electro-oxidation, and numerous niche processes [7][8][9][10][11][12][13][14][15][16][17][18][19]. Produced hydrogen can be stored and utilized in various ways, e.g., transportation and power generation sectors (fuel cells and internal combustion engines) [20][21][22], domestic applications (spatial heating and cooking) [23,24], ammonia and methanol production [25,26], and in the petrochemical industry [27] (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…Figure17. Schematic of the catalytic hydrogen burner with Pt/SiC foam disks (reproduced from[147] with permission from Elsevier).…”

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confidence: 99%

Catalytic Hydrogen Combustion for Domestic and Safety Applications: A Critical Review of Catalyst Materials and Technologies

2021

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Spatial heating and cooking account for a significant fraction of global domestic energy consumption. It is therefore likely that hydrogen combustion will form part of a hydrogen-based energy economy. Catalytic hydrogen combustion (CHC) is considered a promising technology for this purpose. CHC is an exothermic reaction, with water as the only by-product. Compared to direct flame-based hydrogen combustion, CHC is relatively safe as it foregoes COx, CH4, and under certain conditions NOx formation. More so, the risk of blow-off (flame extinguished due to the high fuel flow speed required for H2 combustion) is adverted. CHC is, however, perplexed by the occurrence of hotspots, which are defined as areas where the localized surface temperature is higher than the average surface temperature over the catalyst surface. Hotspots may result in hydrogen’s autoignition and accelerated catalyst degradation. In this review, catalyst materials along with the hydrogen technologies investigated for CHC applications were discussed. We showed that although significant research has been dedicated to CHC, relatively limited commercial applications have been identified up to date. We further showed the effect of catalyst support selection on the performance and durability of CHC catalysts, as well as a holistic summary of existing catalysts used for various CHC applications and catalytic burners. Lastly, the relevance of CHC applications for safety purposes was demonstrated.

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Hydrogen generation by the hydrolysis of mechanochemically activated aluminum-tin-indium composites in pure water

Cited by 53 publications

References 116 publications

Material Aspects Pertaining to Hydrogen Production from Aluminum: Opinion

Material Aspects Pertaining to Hydrogen Production from Aluminum: Opinion

On-Demand Hydrogen Generation by the Hydrolysis of Ball-Milled Aluminum–Bismuth–Zinc Composites

Catalytic Hydrogen Combustion for Domestic and Safety Applications: A Critical Review of Catalyst Materials and Technologies

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