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'''Photofermentation''' is the [[Fermentative hydrogen production|fermentative]] conversion of organic substrate to [[biohydrogen] ...rk-and photo-fermentation of sucrose. | journal = International Journal of Hydrogen Energy | date = February 2007 | volume = 32 | issue = 2 | pages = 200–6 | d ...

'''Biological methanation''' (also: '''biological hydrogen methanation (BHM)''' or '''microbiological methanation''') is a conversion ...called [[methanogenesis]], a specific, anaerobic metabolic pathway where [[hydrogen]] and carbon dioxide are converted into methane. By analogy with the biolog ...

...The hydrogen thus produced can serve as an energy carrier for a [[hydrogen economy]]. In the following section XH stands for any hydrogen compound, e.g. CH- and NH-compounds. ...

...>2</sub> methanation occurs by first associatively adsorbing an [[adatom]] hydrogen and forming oxygen intermediates before hydrogenation or dissociating and ...olume=49|pages=46–53}}</ref> Methanation catalysts are added after several hydrogen producing steps to prevent [[Oxocarbon|carbon oxide]] buildup in the ammoni ...

...operating at elevated current densities.|journal=International Journal of Hydrogen Energy|year=2019|volume=44|issue=20|pages=9708–9717|doi=10.1016/j.ijhydene. ...ehensive review on PEM water electrolysis|journal=International Journal of Hydrogen Energy|volume=38|issue=12|pages=4901–4934|year=2013|doi=10.1016/j.ijhydene. ...

{{Short description|Measurement of fuel economy}} ...] showing the [[United States Environmental Protection Agency|EPA]]'s fuel economy equivalent ratings for the 2011 [[Chevrolet Volt]]. The rating for [[all-el ...

...May 2024 |chapter=Some Basic Processes at Surfaces—Exemplified by Means of Hydrogen Interaction With Transition Metals}}</ref> which can enable faster measurem ...eactions. The relevant effects for this promoting role are [[Hydrogen bond|hydrogen bonding]] between the water molecule and oxygen, and the electronic modific ...

...t2=Hankwon |title=An overview of water electrolysis technologies for green hydrogen production |journal=Energy Reports |date=November 2022 |volume=8 |pages=137 ...last7=Röntzsch |first7=Lars |last8=Meier-Haack |first8=Jochen |title=Green hydrogen from anion exchange membrane water electrolysis: a review of recent develop ...

...rst1=Y.-H. Percival |title=A sweet out-of-the-box solution to the hydrogen economy: is the sugar-powered car science fiction? |journal=Energy & Environmental ...rom [[polymer]] to [[monomer]] and then oxidized into carbon dioxide and [[hydrogen ion]]s during four reactions. The reactions involve the enzymatic catalysts ...

==== Hydrogen ==== When hydrogen and steam are considered as reactants, the overall reaction takes this form ...

...[[Pollution|environmental pollution]] by creating a sustainable [[Circular economy|circular network]] of waste upcycling, clean fuel (and chemical) generation ...aruki |last2=Nagata |first2=Morio |date=2021-12-02 |title=Highly Efficient Hydrogen Production in the Photoreforming of Lignocellulosic Biomass Catalyzed by Cu ...

...xide electrolyzer cell (SOEC) | url = | journal = International Journal of Hydrogen Energy | volume = 33 | issue = 9| pages = 2337–2354 | doi = 10.1016/j.ijhyd ...e conditions for a [[solid oxide fuel cell]]. The net cell reaction yields hydrogen and oxygen gases. The reactions for one [[Mole (unit)|mole]] of water are s ...

.../www.imperial.ac.uk/events/102629/synthetic-metabolism-and-the-formate-bio-economy-conceptaddressing-humanitys-grand-challenges/ |access-date=2021-11-18|websi ...at least one methanogenic partner microorganism must be present to remove hydrogen. Some microorganisms, such as ''[[Desulfurococcus amylolyticus]]'', are abl ...

...rt description|Heat-sustained chemical process which decomposes water into hydrogen and oxygen}} ...Laboratory (INL)</ref> The term ''cycle'' is used because aside of water, hydrogen and oxygen, the chemical compounds used in these processes are continuously ...

...efforts have been applied to researching the feasibilities of a [[methanol economy]]. ...activity of methane uses transition metal complexes to activate the carbon-hydrogen bonds. In a typical C-H activation mechanism, a transition metal catalyst c ...

...96r|pmid=17927159}}</ref> The catalytic site on the enzyme provides simple hydrogen-metabolizing microorganisms a [[redox]] mechanism by which to store and uti ...rogenases are actively being researched for applications to the [[hydrogen economy]] and as potential antibiotic targets. ...

...bility. The efficiency of a chemical process can be quantified by its atom economy, yield, volume-time output, and environmental factor (E-factor), and its re ...nd Wittig Example.svg|alt=|thumb|300x300px|An illustrative example of atom economy using the Claisen rearrangement and Wittig reaction.]] ...

...o better suit the needs of the Province. Because of Alberta's energy based economy other pollutants are also considered when reporting the AQHI. * 1 part per million for hydrogen sulphide and total reduced sulphur<ref name="alberta1">{{cite web|url=http: ...

...that for each mole of chlorine introduced into a hydrocarbon, one mole of hydrogen chloride is also formed and noted the light-sensitivity of this reaction.<r ...30&nbsp;°C the relative reaction rates of primary, secondary and tertiary hydrogen atoms are in a relative ratio of approximately 1 to 3.25 to 4.43. The C-C b ...

{{short description|Plan to transform the EU into a climate-neutral economy by 2050}} ...n its climate merits, and also introduce new legislation on the [[circular economy]] (CE), [[building renovation]], [[biodiversity]], farming and [[innovation ...