Enhancement of hydrogen generation rate in reaction of aluminum with water

Mahmoodi, Korosh; Alinejad, Babak

doi:10.1016/j.ijhydene.2010.03.016

Cited by 168 publications

(76 citation statements)

References 25 publications

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“…This substantial gulf between the dross materials and the reported aluminium/alloys, shown in Table 2, was not observed when considering the maximum flow rate achieved by the reaction. The recycled dross allowed a maximum flow rate to be obtained not considerably differing from that which was reported by Soler et al [17] and Macanas et al Mahmoodi et al [14] used an aluminium-bismuth alloy to achieve the maximum flow rate shown in Table 2, a flow rate which was surpassed by the low purity aluminium dross (LD) redirected from landfill.…”

Section: Resultsmentioning

confidence: 89%

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The production of hydrogen as an alternative energy carrier from aluminium waste

2017

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Background: Aluminium dross is a valuable resource that is often redirected to landfill as there are no real viable solutions for the utilisation of this industrial waste. A study has been conducted to provide a recycling process where the dross is reacted with an alkaline solution in order to generate hydrogen with bayerite and gibbsite products. Methods: Samples of aluminium dross were obtained from two sources: aluminium dross obtained from an aluminium recycling facility, recycled dross (RD) in Qatar and aluminous dross samples which were to be directed to landfill, landfill dross (LD), also in Qatar. Quantities of each sample were weighed in amounts that would contain equal amounts of aluminium reacting with an aqueous NaOH solution to generate hydrogen. The generated hydrogen has been analysed and compared with that reported in the literature. Results: Certainly, the lower purity sample LD was treated at a lower standard than the recycled dross. The LD and RD samples generated 0.15 and 0.5 g/l Al, respectively, with the landfilled dross achieving a maximum flow rate of 0.8 l/min compared to an RD which generated hydrogen at 2 l/min. The results proved that both forms of aluminium dross possess the potential to provide an acceptable volume of hydrogen at relatively consistent flow rates. The RD sample provided higher flow rates, and the LD sample generated hydrogen at a lower but consistent flow rate for a longer period and at a volume rather close to that of the RD sample. XRD analysis of the resulting product also yielded promising results with the formation of bayerite and gibbsite, which would provide additional side products of market value; if this process will be conducted on a larger scale. Conclusions: This study has shown very promising results, with both dross samples allowing for an acceptable production of hydrogen. It has shown that the utilisation of dross can be a potentially economically viable process for a product that provides clean, renewable energy and residual aluminous products of a real market value.

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Section: Resultsmentioning

confidence: 89%

“…Alinejad and Mahmoodi [14] studied the possibility of generating hydrogen from the aluminium-water reaction through the use of highly activated aluminium. Aluminium powder was activated by being milled with sodium chloride.…”

Section: Review Of Existing Research and The Way Forwardmentioning

confidence: 99%

The production of hydrogen as an alternative energy carrier from aluminium waste

2017

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“…Aluminum oxidation has become of particular interest worldwide [7][8][9][10][11][12][13][14][15][16][17][18][19]. When smelting aluminum alloys, the thickness of the oxide film forming on the surface largely depends of the method of melting solid pieces of the charge in the furnace: in a drop-stream mode or under a layer of liquid metal (in a liquid bath).…”

Section: Methods and Designmentioning

confidence: 99%

Aluminium Alloys Smelting in Shaft- Reverberatory Furnaces in a Liquid Bath Mode

Грачев¹

2017

Archives of Foundry Engineering

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The aim of research was creation of a furnace for aluminum alloys smelting "in a liquid bath" in order to reduce metal loss. In the paper, the author demonstrates the results of research on smelting of aluminum alloys in a shaft-reverberatory furnace designed by the author. It has been shown that smelting aluminum alloy in a liquid bath was able to significantly reduce aluminum loss and that shaft-reverberatory design provided high efficiency and productivity along with lower energy costs. Ensuring continuous operation of the liquid bath and superheating chamber, which tapped alloy with the required texture, was achieved by means of the optimal design of partition between them. The optimum section of the connecting channels between the liquid bath of smelting and the superheating chamber has been theoretically substantiated and experimentally confirmed. The author proposed a workable shaft-reverberatory furnace for aluminum alloys smelting, providing solid charge melting in a liquid bath.

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“…Furthermore, the activated powder can be easily stored for a long time. 20) Czech et al 21) investigated the effect of different salt on the corrosion rate of Al powder. Using KCl obtained the higher hydrogen generation rates and hydrogen conversion efficiency in comparison with NaCl.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Hydrolysis of Aluminum Based Composites for Hydrogen Production in Pure Water

Wang

Dong

et al. 2014

Mater. Trans.

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A series of Al based composites were prepared using mechanical milling method in this paper. Effects of additives including CaO, NaCl salt and low melting point metals (Ga, In, and Sn) on the hydrolysis activity of Al based composites were evaluated in pure water. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used for the microstructure analysis of as-prepared samples and their hydrolysis products. The results showed that the addition of CaO, NaCl salt and low melting point metals can effectively improve the hydrolysis properties of Al based composites. Especially, Al alloys-CaONaCl composites exhibited a higher hydrogen yields than AlCaO and AlCaO NaCl materials. The SEM images displayed that NaCl salt particles were homogeneously distributed on the surface of Al based composites and inserted into Al matrix, which may damage the surface oxide layer of Al. Furthermore, the size of NaCl salt particles was much smaller in Al alloys-CaONaCl composites than that in AlCaONaCl composites. The XRD patterns identified that the hydrolysis products were mainly composed of AlO(OH) and Al(OH) 3 . The microstructure-related hydrolysis reaction mechanism of Al based composites was proposed finally.

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Enhancement of hydrogen generation rate in reaction of aluminum with water

Cited by 168 publications

References 25 publications

The production of hydrogen as an alternative energy carrier from aluminium waste

The production of hydrogen as an alternative energy carrier from aluminium waste

Aluminium Alloys Smelting in Shaft- Reverberatory Furnaces in a Liquid Bath Mode

Preparation and Hydrolysis of Aluminum Based Composites for Hydrogen Production in Pure Water

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