A new innovation can produce green hydrogen powered by a low-cost environmentally friendly method utilizing scrap metal. Do you know that the process of producing green hydrogen without emitting greenhouse gases is simple and affordable?
To get started, simply take multiple coke cans, shred them into small pieces of metal, and place them in a basin of water. Hydrogen is released.
However, the issue is that this process produces so little gas that it is scarcely worth the effort. This is because the oxygen in the water combines with the aluminum surface very quickly to create an oxide coating that stops further reaction. The solution lies in identifying a substance, or a catalyst, capable of eliminating the oxide layer. Gallium has been employed for that purpose by several researchers. Others have demonstrated that a rather high hydrogen yield can be achieved by using a fine dust of silicon-doped aluminum, but it is an expensive metal.
Production of green hydrogen using metal scrap
Scientists from the Department of Chemical Engineering, IIT Madras, led by Professors RB Harikrishna, Hemagni Deka, T Sundararajan, and G Ranga Rao, have shown that scrap metals can be used as feedstock for the thermochemical synthesis of green hydrogen. By splitting water at high temperatures using industrial waste-metal scrap, the gas is created. For this process to reach the desired temperature, a substantial amount of energy must be input in the beginning. In a recent publication in The International Journal of Hydrogen Energy, the researchers remark that the exothermic nature of the process can lead to a reduction in energy intake.
The professors investigated the reaction of steam and metal scrap to produce green hydrogen. At 1150°C, their process yielded 500 mL of green H2 for every gram of scrap material, with a conversion efficiency of almost 94%. They state, “this is a potential way to use scrap metals for large-scale, carbon-emission-free green hydrogen production.” About 500,000 liters of hydrogen can be produced from a ton of metal waste using this procedure. The main byproduct obtained is magnetite, which could be used as an addition in fluids with magneto-rheological properties. This can be turned into a low-cost green hydrogen production technology because it is an environmentally benign process. Several other kinds of scrap metal products can also be used in this technique to produce green hydrogen.
A US business called Monolith, situated in Nebraska, has said that it has created a method for employing methane pyrolysis to produce inexpensive green hydrogen. Although it still consumes natural gas, it claims to emit only 0.45 kg of CO2 for every kilogram of hydrogen produced, as opposed to 11.3 kg for the traditional “steam methane reforming” method. CO2 emissions will be zero if the feedstock comes from recycled or biogenic sources, according to Monolith.
Investors like Decarbonization Partners, Mitsubishi Heavy Industries, Warburg Pincus, and TPR Rise Climate support the enterprise.
The method is straightforward: superheat methane using electricity. The procedure uses roughly 55 kWhr of electricity per kilogram of hydrogen, or one-seventh of what an electrolyser would require. The CO2 molecule’s hydrogen and carbon atom bonds are broken by heat. You get two valuable products out of the apparatus: carbon black and hydrogen. The hydrogen and carbon atoms come out separately.
UH2 cares about environmental sustainability by standing out at the forefront of green hydrogen solutions, exploring innovative and sustainable methods for producing hydrogen. This breakthrough represents an important milestone in the field of renewable energy, offering a greener and more efficient alternative to conventional methods.
Learn more about green hydrogen here!