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Temperature dependence on hydrogen production from hydrolysis reaction of recycled aluminum

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Abstract

Hydrogen (H2) is an energy carrier capable of replacing fossil fuels without the main effect of combustion-based pollutant generation into the atmosphere. Therefore, its sustainable production is of great interest. In this research study, the effect of temperature in the reaction of hydrolysis with recycled aluminum for the H2 production has been evaluated. The reaction was carried by using a concentrated NaOH solution, and different operating temperatures were established. According to the gas chromatography analysis, the produced H2 has a purity of 93.33%. Accumulated H2 production over time at different temperatures was statistically modeled with growth models (Gompertz, Logistic and Asymptotic) which showed a good fit. According to the statistical analysis, it was found that the main effect of temperature on the reaction is the increase in speed, with the highest production (727 mL) in 116 s at 50 °C. Nevertheless, at room temperature, the reaction efficiency was found to be 97%, obtaining 660 mL of H2 in 268 s. The physicochemical characterization of the solid residues obtained in the reaction revealed that these are formed by micrometric agglomerates containing aluminum, sodium, and oxygen. Moreover, the main crystalline phases detected were aluminum hydroxide and sodium aluminum oxide hydrate. It is concluded that the production of H2 from recycled aluminum at room temperature can be a viable option for the generation of clean power with lower energy consumption and financial costs than traditional technologies.

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Acknowledgements

The collaboration of the Environmental Engineering laboratories of the Faculty of Engineering of the Autonomous University of Yucatan, Mexico, and the use and facilities of LANNBIO, Cinvestav-Merida are gratefully acknowledged.

Funding

This research received support of: CONACYT Project CB-2015-255109, CONACYT (CB-2015-01) Project 254321 and Project CONACYT-SENER 254667.

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Conceptualization was contributed by M.R-G. and L.S-P.; methodology was contributed by R.Q. and J.M.; C.V-P. and J.M. contributed to software; M.F-B. and R.Q. contributed to validation; C.V-P. and M.F-B. contributed to formal analysis; M.A.E-S. and E.H-N. contributed to research; writing—original draft preparation, was contributed by L.S-P. and E.H-N.; writing—review and editing, was contributed by M.R-G. and M.A.E-S.; M.R-G. and L.S-P contributed to project administration. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Liliana San-Pedro or Miguel Ruiz-Gómez.

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Soberanis, M.A.E., Vales-Pinzón, C., Hernández-Núñez, E. et al. Temperature dependence on hydrogen production from hydrolysis reaction of recycled aluminum. Clean Techn Environ Policy 25, 35–49 (2023). https://doi.org/10.1007/s10098-022-02386-y

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  • DOI: https://doi.org/10.1007/s10098-022-02386-y

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