Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures
The production of hydrogen via an aluminum-water reaction is explored at temperatures and pressures ranging from 273.15 to 600 K and 0.1–10 MPa, respectively. Across this range, aluminum and water can react to form different aluminum oxide and hydroxide species, resulting in differences in the relea...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Elsevier BV
2021
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| Online Access: | https://hdl.handle.net/1721.1/129778 |
| _version_ | 1826210816826802176 |
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| author | Godart, Peter Fischman, Jason Z. Seto, Kelsey C. Hart, Douglas |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Godart, Peter Fischman, Jason Z. Seto, Kelsey C. Hart, Douglas |
| author_sort | Godart, Peter |
| collection | MIT |
| description | The production of hydrogen via an aluminum-water reaction is explored at temperatures and pressures ranging from 273.15 to 600 K and 0.1–10 MPa, respectively. Across this range, aluminum and water can react to form different aluminum oxide and hydroxide species, resulting in differences in the release of thermal energy, as well as the amount of water required stoichiometrically for the reaction to proceed. A model presented in this work uses the Gibbs free energy to predict the favorability of these byproducts as a function of temperature and pressure. At 0.1 MPa, this model predicts the primary favorability of Al(OH)₃ (gibbsite)below 294 K, AlOOH (boehmite)from 294 to 578 K, and Al₂O₃ (corundum)above 578 K. The results of this model were tested using a previously established technique for activating bulk aluminum via infusion of a gallium-indium eutectic into its grain boundary network. Reaction tests were performed at the extremities of the operating range of interest, and the composition of the byproducts from each test, determined via Fourier transform infrared spectroscopy (FTIR)and X-ray diffraction (XRD)analysis, were all in alignment with the model. Furthermore, reaction tests above 423 K at 0.1 MPa indicate limited reactivity of steam with aluminum activated in this manner. Consequently, the model is modified accordingly to show that Al₂O₃ cannot be achieved in practice with this method as its transition remains above the saturation temperature of water at the pressures studied here. |
| first_indexed | 2024-09-23T14:55:54Z |
| format | Article |
| id | mit-1721.1/129778 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:55:54Z |
| publishDate | 2021 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1297782022-10-01T23:26:41Z Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures Godart, Peter Fischman, Jason Z. Seto, Kelsey C. Hart, Douglas Massachusetts Institute of Technology. Department of Mechanical Engineering The production of hydrogen via an aluminum-water reaction is explored at temperatures and pressures ranging from 273.15 to 600 K and 0.1–10 MPa, respectively. Across this range, aluminum and water can react to form different aluminum oxide and hydroxide species, resulting in differences in the release of thermal energy, as well as the amount of water required stoichiometrically for the reaction to proceed. A model presented in this work uses the Gibbs free energy to predict the favorability of these byproducts as a function of temperature and pressure. At 0.1 MPa, this model predicts the primary favorability of Al(OH)₃ (gibbsite)below 294 K, AlOOH (boehmite)from 294 to 578 K, and Al₂O₃ (corundum)above 578 K. The results of this model were tested using a previously established technique for activating bulk aluminum via infusion of a gallium-indium eutectic into its grain boundary network. Reaction tests were performed at the extremities of the operating range of interest, and the composition of the byproducts from each test, determined via Fourier transform infrared spectroscopy (FTIR)and X-ray diffraction (XRD)analysis, were all in alignment with the model. Furthermore, reaction tests above 423 K at 0.1 MPa indicate limited reactivity of steam with aluminum activated in this manner. Consequently, the model is modified accordingly to show that Al₂O₃ cannot be achieved in practice with this method as its transition remains above the saturation temperature of water at the pressures studied here. 2021-02-16T20:40:04Z 2021-02-16T20:40:04Z 2019-05 2019-03 2020-07-21T12:03:06Z Article http://purl.org/eprint/type/JournalArticle 0360-3199 https://hdl.handle.net/1721.1/129778 Godart, Peter et al. "Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures." International Journal of Hydrogen Energy 44, 23 (May 2019): 11448-11458 © 2019 Hydrogen Energy Publications LLC en http://dx.doi.org/10.1016/j.ijhydene.2019.03.140 International Journal of Hydrogen Energy Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV Author website |
| spellingShingle | Godart, Peter Fischman, Jason Z. Seto, Kelsey C. Hart, Douglas Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures |
| title | Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures |
| title_full | Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures |
| title_fullStr | Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures |
| title_full_unstemmed | Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures |
| title_short | Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures |
| title_sort | hydrogen production from aluminum water reactions subject to varied pressures and temperatures |
| url | https://hdl.handle.net/1721.1/129778 |
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