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  2. Biohydrogen - Wikipedia

    en.wikipedia.org/wiki/Biohydrogen

    The biological hydrogen production with algae is a method of photobiological water splitting which is done in a closed photobioreactor based on the production of hydrogen as a solar fuel by algae. [ 13 ] [ 14 ] Algae produce hydrogen under certain conditions.

  3. Hydrogen therapy - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_therapy

    Hydrogen therapy is the use of molecular hydrogen (H 2) for therapeutic purposes. H 2 has therapeutic benefits due to its antioxidant and anti-inflammatory effects, as well as due to its role as an inducer of gene expression , [ 1 ] H 2 is not cytotoxic or explosive below 4% concentration. [ 2 ]

  4. Hydrogen production - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_production

    High pressure electrolysis is the electrolysis of water by decomposition of water (H 2 O) into oxygen (O 2) and hydrogen gas (H 2) by means of an electric current being passed through the water. The difference with a standard electrolyzer is the compressed hydrogen output around 120–200 bar (1740–2900 psi , 12–20 MPa ). [ 146 ]

  5. Electrolysis of water - Wikipedia

    en.wikipedia.org/wiki/Electrolysis_of_water

    Considering the industrial production of hydrogen, and using current best processes for water electrolysis (PEM or alkaline electrolysis) which have an effective electrical efficiency of 70–80%, [68] [73] [74] producing 1 kg of hydrogen (which has a specific energy of 143 MJ/kg) requires 50–55 kW⋅h (180–200 MJ) of electricity.

  6. Girdler sulfide process - Wikipedia

    en.wikipedia.org/wiki/Girdler_sulfide_process

    The process is named after the Gildler Company, which constructed the first American plant to implement it. The method is an isotopic exchange process, where isotopes of hydrogen are swapped between hydrogen sulfide (H 2 S) and water (H 2 O), also known as "light" water, that produces heavy water over several steps. This process is highly ...

  7. Steam reforming - Wikipedia

    en.wikipedia.org/wiki/Steam_reforming

    Steam reforming or steam methane reforming (SMR) is a method for producing syngas (hydrogen and carbon monoxide) by reaction of hydrocarbons with water. Commonly, natural gas is the feedstock. The main purpose of this technology is often hydrogen production , although syngas has multiple other uses such as production of ammonia or methanol .