UPDATED – New tech to produce hydrogen from tap water

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A Spanish scientist has developed a system that reportedly produces hydrogen on-site without expensive electrolysis. The prototype utilizes a water tank that is initially filled with water, ferrosilicon, and sodium hydroxide.

JULY 27, 2022 PILAR SÁNCHEZ MOLINA

From pv magazine Spain
Spanish scientist José Antonio G. I. has developed a system that is able to generate and store hydrogen on-site from tap water without electrolysis.
“Until now, the most common way to produce hydrogen is by electrolysis. However, this process implies a significant electrical consumption that makes it not interesting from an economic point of view,” he told pv magazine.
The prototype consists of a water tank that is initially filled with water, ferrosilicon, and sodium hydroxide. Hydrogen production begins when a 20 W compressor discharges pressurized air in the lower part of the tank.
“It is the air that causes the reaction between the different chemical components and generates hydrogen,” the scientist explained. “Then, the generated hydrogen leaves through the upper area of ​​the tank to be introduced into an equally pressurized tank. The water in this second tank collects the possible impurities and hydrogen comes out through the upper part of the tank.”
After the hydrogen is purified, it flows via an upper conduit to another tank equipped with closed contacts, a safety valve and an outlet pipe assisted by a solenoid valve.
Currently, we are developing a model with a 220-litre tank that can work with a pressure of 1 kg/cm2 and a flow rate of 30 litres per minute,” González Ibáñez went on to say. “This can generate heating, hot water and electricity for a household or a small business.”
The group is also designing a larger model that can work with a pressure of 750 Kg/cm2 and can reportedly supply a thermal power plant or a container ship.
“Hydrogen is produced at the place of consumption, so transportation disappears, it only needs a water tap,” the scientist emphasized. “The system is capable of generating the energy equivalent to a liter of gasoline –30 Mjoules or 8.333333 kW– for €0.0151515 ($0.0153749).”
First compression test, with only two tanks: the generation tank and the rinsing tank, with no safety measures yet.
*The article was updated on July 29 to specify that the two chemical elements added to the first tank are ferrosilicon and sodium hydroxide.
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