MIT engineers have developed a fast and sustainable method for producing hydrogen fuel using aluminum, saltwater, and coffee grounds.
In a groundbreaking discovery, the Massachusetts Institute of Technology suggests that old soda cans and seawater could be the key to revolutionizing fuel production and creating a sustainable source of clean energy.
The aluminum is pretreated with a rare-metal alloy that effectively scrubs aluminum into a pure form that can react with seawater to generate hydrogen. In a sustainable cycle, the salt ions in the seawater can attract and recover the alloy, which can be reused to generate more hydrogen. In the end, the team discovered that a low concentration of imidazole — an active ingredient in caffeine — is enough to significantly speed up the reaction, producing the same amount of hydrogen in just five minutes, compared to two hours without the added stimulant.The researchers are developing a small reactor that could run on a marine vessel or underwater vehicle.
“We also don’t have to carry a tank of hydrogen. Instead, we would transport aluminum as the ‘fuel,’ and just add water to produce the hydrogen that we need.”Hydrogen gas is seen as a “green” energy source that could power engines and fuel cells without generating climate-warming emissions.
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