Aluminum Scrap to Hydrogen: Complex Effects of Oxidation Medium, Ball Milling Parameters, and Copper Additive Dispersity

An effective combination of oxidation medium, ball milling parameters, and copper additive disperstiy ensuring fast aluminum scrap reaction with high hydrogen yield, was suggested. Different milling parameters (5, 10, and 15 mm steel balls; 1 and 2 h; unidirectional and bidirectional rotation modes) were tested for Al-10 wt.% Cu (50–70 μm) composition. The samples milled with 5 (2 h) and 10 mm (1 and 2 h) balls contained undesirable intermetallic phases Al2Cu and Cu9Al4, while those activated with 15 mm balls (1 h) provided the second-finest powder and best preservation of the original Cu and Al phases. Among the tested (at 60 °C) 2 M solutions NaCl, LiCl, KCl, MgCl2, ZnCl2, BaCl2, CaCl2, NiCl2, CoCl2, FeCl2, and AlCl3, the first six appeared to be almost useless (below 4% hydrogen yield), the following four provided better results, and the ultimate 91.5% corresponded to AlCl3. Samples with Cu dispersity of 50–100 nm, 1–19, 50–70, and 150–250 μm, and with no additive, were milled under the optimal parameters and tested in AlCl3. Their total yields were similar (~90–94%), while reaction rates differed. The highest rate was obtained for the sample modified with 50–70 μm powder.

Авторы
Buryakovskaya Olesya A. , Suleimanov Musi Zh. , Vlaskin Mikhail S. , Kumar Vinod , Ambaryan Grayr N.
Журнал
Издательство
MDPI AG
Номер выпуска
2
Язык
Английский
Страницы
185
Статус
Опубликовано
Том
13
Год
2023
Организации
  • 1 Российский университет дружбы народов (РУДН)
  • 2 ОИВТ РАН
  • 3 Graphic Era (Deemed to be University)
Ключевые слова
aluminum scrap; copper powders; composite materials; ball milling; phase transformations; intermetallides; aqueous salt solutions; hydrogen generation
Дата создания
16.11.2023
Дата изменения
16.11.2023
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/94483/
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