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Open AccessArticle

Analysis of Valorization Process of Aluminum Breakage Scraps to Obtain Green Hydrogen

1
Mechanical Engineering Department, ESEIAAT-UPC, Colom 11, 08222 Terrassa, Spain
2
Mechanical Engineering Department, ETSEQ-URV, Països Catalans 26, 45002 Tarragona, Spain
3
Chemical Engineering Department, ESEIAAT-UPC, Colom 11, 08222 Terrassa, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Alexandre Chagnes
Metals 2021, 11(4), 598; https://doi.org/10.3390/met11040598
Received: 26 February 2021 / Revised: 26 March 2021 / Accepted: 4 April 2021 / Published: 6 April 2021
(This article belongs to the Special Issue Advances in Valuable Metal Recycling)
In this article, it is proposed to use aluminum breakage scraps to obtain green hydrogen through the aluminum–water reaction with caustic soda as a catalyst with experimental research. From this exothermic reaction, both hydrogen and the heat generated can be used. Due to the low price of aluminum chips, this allows us to produce green hydrogen below the current price that is obtained using renewable energy sources and electrolyzers. We have also developed a process that is sustainable since it is obtained as alumina and caustic soda waste that can be reused. This alumina obtained, once filtered, has high purity which allows us to produce high-quality primary aluminum without the need to use bauxite and the production of red sludge is also reduced. A comparative study-analysis was carried out between two of the forms in which the most common aluminum is presented in industry to analyze which one performs better by studying key factors such as the hydrogen produced, and the waste generated during the process. Finally, the mathematical model has been defined to be able to control the flow based on different key parameters such as temperature, molarity, and geometry. Undoubtedly, the study that we present represents a milestone for the recovery of metallic aluminum waste and may be of great interest to industries that use aluminum in their processes, such as recuperators, as well as the vehicle and aerospace industries. View Full-Text
Keywords: metal waste valorization; aluminum breakage scrap; green hydrogen; hydrogen-controlled generation metal waste valorization; aluminum breakage scrap; green hydrogen; hydrogen-controlled generation
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MDPI and ACS Style

Salueña Berna, X.; Marín-Genescà, M.; Dagà-Monmany, J.M. Analysis of Valorization Process of Aluminum Breakage Scraps to Obtain Green Hydrogen. Metals 2021, 11, 598. https://doi.org/10.3390/met11040598

AMA Style

Salueña Berna X, Marín-Genescà M, Dagà-Monmany JM. Analysis of Valorization Process of Aluminum Breakage Scraps to Obtain Green Hydrogen. Metals. 2021; 11(4):598. https://doi.org/10.3390/met11040598

Chicago/Turabian Style

Salueña Berna, Xavier; Marín-Genescà, Marc; Dagà-Monmany, José M. 2021. "Analysis of Valorization Process of Aluminum Breakage Scraps to Obtain Green Hydrogen" Metals 11, no. 4: 598. https://doi.org/10.3390/met11040598

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