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  2. 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 ]

  3. 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 .

  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. Hydrogen purification - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_purification

    Hydrogen can be purified by passing through a membrane composed of palladium and silver. Permeability of the former to hydrogen was discovered back in the 1860s. [2] An alloy with a ca. 3:1 ratio for Pd:Ag is more structural robust than pure Pd, which is the active component that allows the selective diffusion of H 2 through it.

  6. Hydrogen storage - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_storage

    Where p H 2 is the partial pressure of hydrogen, ΔH is the enthalpy of the sorption process (exothermic), ΔS is the change in entropy, R is the ideal gas constant, T is the temperature in Kelvin, V m is the molar volume of the metal, r is the radius of the nanoparticle and γ is the surface free energy of the particle.

  7. High-pressure electrolysis - Wikipedia

    en.wikipedia.org/wiki/High-pressure_electrolysis

    High-pressure electrolysis is being investigated by the DOE for efficient production of hydrogen from water. The target total in 2005 is $4.75 per gge H 2 at an efficiency of 64%. [10] The total goal for the DOE in 2010 is $2.85 per gge H 2 at an efficiency of 75%. [11] As of 2005 the DOE provided a total of $1,563,882 worth of funding for ...