Reaction of Aluminum with Sodium Hydroxide Solution as a Source of Hydrogen

Belitskus, David

doi:10.1149/1.2407730

Cited by 133 publications

(62 citation statements)

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“…However, the generation of hydrogen gas from Al/water system is slow due to the thin layer of aluminum oxide on the surface of Al. The generation of hydrogen can be achieved by using highly corrosive basic solution such as sodium hydroxide (pH>13) [2]. Additives such as aluminum hydroxide [3], sodium stannate in sodium hydroxide solution [4], [5], hot water [6], CaO [7] were reported to be effective for enhanced generation of hydrogen, where serious corrosive conditions can be avoided.…”

Section: Introductionmentioning

confidence: 99%

Rapid Hydrogen Generation from Aluminum-Water System Using Synthesized Aluminum Hydroxide Catalyst

Wang¹,

Chin²

2015

IJCEA

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Abstract-Catalytic effect of Al(OH) 3 on the hydrogen generation from Al/water system is evaluated. The Al(OH) 3 powders are synthesized from various molar ratios of Al(NO 3 ) 3 : NaOH = 1:3 ~ 1:5. It was found that the Al(OH) 3 catalyst derived from the ratio Al(NO 3 ) 3 : NaOH = 1:3.5~1:4 in an ice bath exhibits the best catalytic effect and exerts the highest hydrogen generation rate. Over 95% yield of hydrogen from a 3 g Al/50 ml water system (with 15 g Al(OH) 3 and pH=12) can be generated within 100 s. That is, by using specially synthesized Al(OH) 3 catalyst at a Al:Al(OH) 3 :H 2 O=3:15:50 weight ratio, very rapid hydrogen generation rate (~667 ml/gAlmin), without using any alloying elements or extreme corrosive condition, can be realized.Index Terms-Aluminum hydroxide, aluminum nitrate, hydrogen generation.

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Section: Introductionmentioning

confidence: 99%

Rapid Hydrogen Generation from Aluminum-Water System Using Synthesized Aluminum Hydroxide Catalyst

Wang¹,

Chin²

2015

IJCEA

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“…(6) Where, mb = wet mass, mk = dry mass, mu = vapor mass, ρ = density, φ = porosity, and Vt = measured volume. Herein, the value of mu is relative for each material and mu cannot be used to determine the porosity since the materials are synthetic materials.…”

Section: Density and Porosity Testsmentioning

confidence: 99%

“…The reaction between aluminium and water, catalyzed by NaOH, has been elaborated in the previous studies [5][6], as shown in the following equation: From Eq. (1), the oxidation of aluminium produces hydrogen [7][8][9] and sodium aluminium hydrate.…”

Section: Introductionmentioning

confidence: 99%

Analysis of aluminum base-reaction effect in density, porosity, and thermal insulation of porous fire bricks

Firmansyah¹,

Meidianto²,

Widayatno³

et al. 2018

AIP Conference Proceedings

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Abstract.This paper reports the effect of aluminium corrosion reaction on the density, porosity, and thermal insulation capability of porous fire bricks. The reaction between aluminium and alkaline solution produces hydrogen and other sediment products. The test specimens of fire bricks were made from the mixture of castable cement, aluminium powder of 325 mesh in size (0, 0.1, 1, and 2 wt% with respect to castable cement), and 0.185 M KOH solution. The structural examination of the specimens shows the increase of porosity to 22.7 -30.6% and the decrease of density in the range of 1.135-1.503 g/mL. In addition, the samples possess average pore size of 0.001-0.003 cm 3 with the thermal insulation in the range of 47-78%.

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“…∆S = 26.2 J/K und ∆G = −284 KJ [12]) is a suitable reaction for aluminosilicate sodalite synthesis. Besides providing of the whole heat energy for the synthesis process even the aluminate source for sodalite formation is produced under these aqueous alkaline conditions too, according to the reaction [13]:…”

Section: Bhmentioning

confidence: 99%

NaBH<sub>4</sub> Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow

Buhl¹

2017

ACES

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NaBH 4 sodalites were obtained by two new modified methods of crystallization: (1) autothermal synthesis and (2) crystallization with crossover from gel to melt flow in NaOH flux. Syntheses results were presented according to XRD, SEM and FTIR. Besides important features of both synthesis procedures product properties like crystal size and morphology were investigated. Spherical agglomerates of microcrystalline sodalite of composition Na 7 [AlSiO 4 ] 6 BH 4 (H 2 O) 2 were already observed after 4 h without any external heating by the autothermal procedure. Sodalites of the same average composition but in form of agglomerated nanoparticles are crystallized after very short times (2 h 30') by the crossover reaction from gel to melt flow. Hydrogen release by heating was further studied for two selected samples with comparable composition from each synthesis procedure. Total hydrogen release by hydrolysis reaction with the internal cage water was found during heating of the autothermal product in synthetic air up to 550˚C. In contrast hydrogen release from the nanocrystalline sample of crossover synthesis was not completed when heated under the same conditions. These differences were discussed in terms of crystal size and an earlier loss of the internal water from the nanocrystals of the crossover synthesis.

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Reaction of Aluminum with Sodium Hydroxide Solution as a Source of Hydrogen

Abstract: not Available.

Cited by 133 publications

References 1 publication

Rapid Hydrogen Generation from Aluminum-Water System Using Synthesized Aluminum Hydroxide Catalyst

Rapid Hydrogen Generation from Aluminum-Water System Using Synthesized Aluminum Hydroxide Catalyst

Analysis of aluminum base-reaction effect in density, porosity, and thermal insulation of porous fire bricks

NaBH<sub>4</sub> Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow

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Reaction of Aluminum with Sodium Hydroxide Solution as a Source of Hydrogen

Abstract: not Available.

Cited by 133 publications

References 1 publication

Rapid Hydrogen Generation from Aluminum-Water System Using Synthesized Aluminum Hydroxide Catalyst

Rapid Hydrogen Generation from Aluminum-Water System Using Synthesized Aluminum Hydroxide Catalyst

Analysis of aluminum base-reaction effect in density, porosity, and thermal insulation of porous fire bricks

NaBH&lt;sub&gt;4&lt;/sub&gt; Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow

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NaBH<sub>4</sub> Sodalites, Synthesized by Modified Methods: (1) Autothermal Synthesis and (2) Crossover Reaction from Gel to Melt Flow