Hydrogen production rates of aluminum reacting with varying densities of supercritical water

Trowell, Keena; Goroshin, Samuel; Frost, David L.; Bergthorson, Jeffrey M.

doi:10.1039/d2ra01231f

Cited by 20 publications

(21 citation statements)

References 36 publications

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“…547,567,568 Alumina combustion can be performed in air or in water, with the latter providing also hydrogen as a product. 540,543,544,559 Hydrogen production on demand at any desired location, at different scales, from the highly exothermic reactions of light metals (Al, Mg, Li) with water could be a significant technological advantage. 544,559 A schematic view of an aluminum-based power generation process is shown in Figure 29.…”

Section: Metal Fuelsmentioning

confidence: 99%

“…540,543,544,559 Hydrogen production on demand at any desired location, at different scales, from the highly exothermic reactions of light metals (Al, Mg, Li) with water could be a significant technological advantage. 544,559 A schematic view of an aluminum-based power generation process is shown in Figure 29. 540 Direct Al/air combustion can be used similarly to coal combustion to fuel a heat engine or boiler and could potentially be envisioned for retrofits of coal power plants.…”

Section: Metal Fuelsmentioning

confidence: 99%

“…562,564 Investigations have been performed for different configurations, particle sizes, and reactive atmospheres, 560,565 including CO 2 /CO/N 2 mixtures, 560 a hot coflow, 563 jet flames, 563,564 and supercritical water. 559 The aluminum reactions can also be inspected under different aspects, focusing on energy storage, power generation, transportation, or hydrogen production. 562,559 Nevertheless, the understanding of the process details is rather insufficient to date, but it will be highly necessary for designing systems suitable for practical applications.…”

Section: Metal Fuelsmentioning

confidence: 99%

“…559 The aluminum reactions can also be inspected under different aspects, focusing on energy storage, power generation, transportation, or hydrogen production. 562,559 Nevertheless, the understanding of the process details is rather insufficient to date, but it will be highly necessary for designing systems suitable for practical applications. While metal fuels can thus contribute to zero-carbon solutions, a suite of studies is needed that provide the pertinent knowledge in similar depth and reliability as for conventional fossil fuels.…”

Section: Metal Fuelsmentioning

confidence: 99%

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Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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Combustion is a reactive oxidation process that releases energy bound in chemical compounds used as fuels�energy that is needed for power generation, transportation, heating, and industrial purposes. Because of greenhouse gas and local pollutant emissions associated with fossil fuels, combustion science and applications are challenged to abandon conventional pathways and to adapt toward the demand of future carbon neutrality. For the design of efficient, low-emission processes, understanding the details of the relevant chemical transformations is essential. Comprehensive knowledge gained from decades of fossil-fuel combustion research includes general principles for establishing and validating reaction mechanisms and process models, relying on both theory and experiments with a suite of analytic monitoring and sensing techniques. Such knowledge can be advantageously applied and extended to configure, analyze, and control new systems using different, nonfossil, potentially zero-carbon fuels. Understanding the impact of combustion and its links with chemistry needs some background. The introduction therefore combines information on exemplary cultural and technological achievements using combustion and on nature and effects of combustion emissions. Subsequently, the methodology of combustion chemistry research is described. A major part is devoted to fuels, followed by a discussion of selected combustion applications, illustrating the chemical information needed for the future.

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Section: Metal Fuelsmentioning

confidence: 99%

Section: Metal Fuelsmentioning

confidence: 99%

Section: Metal Fuelsmentioning

confidence: 99%

Section: Metal Fuelsmentioning

confidence: 99%

See 2 more Smart Citations

Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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“…Therefore, to induce its reaction with water, some activation measures should be applied. Most common ones include temperature elevation above 100 °C to accelerate the reaction between aluminum and liquid water or water vapor [ 21 , 22 , 23 , 24 , 25 , 26 ], aluminum modification with Ga-based alloys to promote its fracturing along grain boundaries [ 27 , 28 , 29 ], and the preparation of alloys or composite powders with different metals (e.g., Cu, Bi, In, Sn, Fe, Si, and Ni) [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ] to enhance aluminum corrosion with hydrogen evolution. Aluminum ball milling together with oxides or hydroxides (Bi(OH) 3 , Al(OH) 3 , Al 2 O 3 , CaO, TiO 2 , etc.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Recovery from Waste Aluminum–Plastic Composites Treated with Alkaline Solution

Buryakovskaya

Vlaskin

2022

Materials

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An alternative solution to the problem of aluminum–plastic multilayer waste utilization was suggested. The process can be used for hydrogen generation and layer separation. Three different sorts of aluminum–plastic sandwich materials were treated with an alkali solution. In the temperature range of 50–70 °C, for tablet blisters of polyvinylchloride and aluminum (14.8 wt.%), the latter thoroughly reacted in 15–30 min. For sheets of paper, polyethylene, and aluminum (20 wt.%), full hydrogen ‘recovery’ from reacted aluminum component took 3–8 min. From the lids of polyethylene terephthalate, aluminum (60 wt.%), and painted polyethylene with perforations, the aluminum was consumed after 45–105 min. The effect of perforations was the reduction of the process duration from nearly 90 min for the lids with no perforations to nearly 45 min for the perforated ones (at 70 °C). Perforations provided better contact between the aluminum foil, isolated between the plastic layers, and the alkali solution. Hydrogen bubbles originating near those perforations provided foil separation from the upper painted plastic layer by creating gas gaps between them. The remaining components of the composite multilayer materials were separated and ready for further recycling.

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TEMPO‐Oxidized Cellulose Nanofibers as Pseudocatalysts for in Situ and on‐Demand Hydrogen Generation via Aluminum Powder/Pure Water Reactions at a Temperature below 50 °C

Fugetsu

Yoshinaga

Kimura

et al. 2023

Adv Energy and Sustain Res

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Cellulose nanofibers (CNFs) prepared via 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO)‐mediated oxidation of the C6 primary hydroxyls of native cellulose to carboxylates are used as pseudocatalysts for enhancing the aluminum powder/pure water reactions. The Al powder/pure water reaction is a stepwise reaction. It starts from hydration of the outmost native Al2O3 thin layer and then the reaction of the inner metallic Al with water. At lower temperatures (<50 °C), OH− and Al3+ ions are the preliminary products of the native Al2O3 thin layer hydration. Once Al powders are mixed with pure water containing 0.1–0.5 wt% TEMPO‐CNFs, condensed networks consisting of TEMPO‐CNFs self‐establish over the native Al2O3 thin layer. Al3+ ions are captured by TEMPO‐CNFs via the formation of insoluble Al3+/TEMPO‐CNFs complexing nanostructures and the conjugated OH− ions are being restricted nearby the native Al2O3‐based thin layer via electrostatic repulsion. A highly alkaline condition (pH > 11) is dynamically generated, and as a result, the native Al2O3 thin layer dissolves rapidly via the reaction with OH− ions. The OH− ions function also as catalysts, accelerating the reaction of metallic Al with water. Al powders (2–200 μm) react promptly and a nearly 100% Al/H2 conversion is obtained at the reaction temperature below 50 °C.

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Hydrogen production rates of aluminum reacting with varying densities of supercritical water

Abstract: Hydrogen production rates of aluminum reacting with various densities of supercritical water are determined using a novel method. High-density supercritical water is found to be the most efficient oxidizer, in terms of both reaction rates and yields.

Cited by 20 publications

References 36 publications

Combustion, Chemistry, and Carbon Neutrality

Combustion, Chemistry, and Carbon Neutrality

Hydrogen Recovery from Waste Aluminum–Plastic Composites Treated with Alkaline Solution

TEMPO‐Oxidized Cellulose Nanofibers as Pseudocatalysts for in Situ and on‐Demand Hydrogen Generation via Aluminum Powder/Pure Water Reactions at a Temperature below 50 °C

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