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Chemical reaction between molecular hydrogen and another compound or element
non-catalytic hydrogenation takes place only at very high temperatures. Hydrogenation reduces double and triple bonds in hydrocarbons. Hydrogenation has three
Hydrogenation
Chemical element with atomic number 1 (H)
cleavage of bonds by hydrogen. Illustrative is the separation of sulfur from liquid fossil fuels: R2S + 2 H2 → H2S + 2 RH Hydrogenation, the addition of H2
Hydrogen
Addition of hydrogen atoms to fat molecules
Fat hydrogenation is the process of combining unsaturated fat with hydrogen in order to partially or completely convert it into saturated fat. Typically
Fat_hydrogenation
Chemical compound
typically by hydrogenation on a palladium catalyst. In the presence of oxygen, the anthrahydroquinone then undergoes autoxidation: the labile hydrogen atoms
Hydrogen_peroxide
Addition of non-molecular hydrogen to a compound
need for high-pressure molecular H2 used in conventional hydrogenation. Transfer hydrogenation usually occurs at mild temperature and pressure conditions
Transfer_hydrogenation
Chemical reaction
Asymmetric hydrogenation is a chemical reaction that adds two atoms of hydrogen to a target (substrate) molecule with three-dimensional spatial selectivity
Asymmetric_hydrogenation
Train transporting or using hydrogen
includes hydrogen trains, zero-emission multiple units, or ZEMUs—generic terms describing rail vehicles, large or small, which use on-board hydrogen fuel
Hydrogen_train
Ionic hydrogenation refers to hydrogenation achieved by the addition of a hydride to substrate that has been activated by an electrophile. Some ionic
Ionic_hydrogenation
Chemical compound
Hydrogen cyanide (also called prussic acid) is a chemical compound with the formula HCN and structural formula H−C≡N. It is a highly toxic and flammable
Hydrogen_cyanide
Canada-based alternative energy company
Hydrogenics is a developer and manufacturer of hydrogen generation and fuel cell products based on water electrolysis and proton-exchange membrane (PEM)
Hydrogenics
Poisonous and flammable gas
favorable thermodynamics for the hydrogenation of sulfur implies that the dehydrogenation (or cracking) of hydrogen sulfide would require very high temperatures
Hydrogen_sulfide
Use of molecular hydrogen for therapeutic purposes
Hydrogen therapy is the use of molecular hydrogen (H2) for therapeutic purposes. Hydrogen therapy’s efficacy has not been established; it may help treat
Hydrogen_therapy
Infrastructure for hydrogen transport and distribution
A hydrogen infrastructure is the infrastructure of points of hydrogen production, truck and pipeline transport, and hydrogen stations for the distribution
Hydrogen_infrastructure
Chemical compound
The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colorless gas, which forms white
Hydrogen_chloride
Methods of storing hydrogen for later use
given partial pressure. Hydrogenation of CO2 to methanol has been evaluated for hydrogen storage. Barriers of CO2 hydrogenation includes purification of
Hydrogen_storage
Procedures for safe production, handling and use of hydrogen
Hydrogen safety covers the safe production, handling and use of hydrogen, particularly hydrogen gas fuel and liquid hydrogen. Hydrogen possesses the NFPA
Hydrogen_safety
Chemical compound
Hydrogen fluoride is an inorganic compound with chemical formula HF. It is a colorless gas or liquid that dissolves in water to yield hydrofluoric acid
Hydrogen_fluoride
Organic compounds that can absorb and release hydrogen through chemical reactions
in hydrogen plasmas, which is relevant for understanding hydrogenation processes. This approach allows for a more nuanced analysis of hydrogenation, particularly
Liquid organic hydrogen carrier
Liquid_organic_hydrogen_carrier
Vehicle that uses hydrogen fuel for motive power
A hydrogen vehicle is a vehicle that uses hydrogen to move. Hydrogen vehicles include some road vehicles, rail vehicles, space rockets, forklifts, ships
Hydrogen_vehicle
Chemical process
Semi/partial hydrogenation of alkynes refers to the reduction of alkyne by one equivalent of hydrogen gas (H2) to give alkene rather than the fully reduced
Semi-hydrogenation_of_alkynes
Hydrogen produced by renewable energy
Green hydrogen (GH2 or GH2) is hydrogen produced by the electrolysis of water using renewable electricity. Production of green hydrogen causes significantly
Green_hydrogen
spillover hydrogen, whereas sodium cations may trap the spillover hydrogen and are detrimental to hydrogenation pathway. Recently the mechanism of hydrogen spillover
Hydrogen_spillover
Measure of the level of acidity or basicity of an aqueous solution
aqueous solutions. Acidic solutions (solutions with higher concentrations of hydrogen (H+) cations) are measured to have lower pH values than basic or alkaline
PH
Hydrogen (1H) has three naturally occurring isotopes: 1H, 2H, and 3H. 1H and 2H are stable, while 3H has a half-life of 12.32 years. Heavier isotopes also
Isotopes_of_hydrogen
Spectral line of hydrogen state transition in UHF radio frequencies
The hydrogen line, 21 centimeter line, or H I line is a spectral line that is created by a change in the energy state of solitary, electrically neutral
Hydrogen_line
Industrial production of molecular hydrogen
Hydrogen gas is produced by several industrial methods. Nearly all of the world's current supply of hydrogen is created from fossil fuels. Most hydrogen
Hydrogen_production
Phase of hydrogen
Metallic hydrogen is a phase of hydrogen in which it behaves like an electrical conductor. This phase was predicted in 1935 on theoretical grounds by
Metallic_hydrogen
Technologies that relating to the production & use of hydrogen
IV reactor Hydrogen bomb Dehydrogenation Hydrogenation Hydrogenolysis Hydrogen therapy Hydrogen odorant Atomic hydrogen welding Hydrogen-cooled turbo
Hydrogen_technologies
Chemical substance
Hydrogen iodide (HI) is a diatomic molecule and hydrogen halide. Aqueous solutions of HI are known as hydroiodic acid or hydriodic acid, a strong acid
Hydrogen_iodide
Molecular hydrogen naturally occurring on Earth
Natural hydrogen (also known as white hydrogen, geologic hydrogen, geogenic hydrogen, or gold hydrogen) is molecular hydrogen present on Earth that is
Natural_hydrogen
Reduction in ductility of a metal exposed to hydrogen
Hydrogen embrittlement (HE), also known as hydrogen-assisted cracking or hydrogen-induced cracking (HIC), is a reduction in the ductility of a metal due
Hydrogen_embrittlement
Liquid state of the element hydrogen
Liquid hydrogen (H2(l)) is the liquid state of the element hydrogen. Hydrogen is found naturally in the molecular H2 form. To exist as a liquid, H2 must
Liquid_hydrogen
Using hydrogen to decarbonize more sectors
Nam Energy Association have included green hydrogenation support. Australian clean energy company Pure Hydrogen Corporation Limited announced on July 22
Hydrogen_economy
Simplest carboxylic acid (HCOOH)
carbon monoxide-free hydrogen. It is used as a source of hydrogen in transfer hydrogenation, as in the Leuckart reaction to make amines and (in aqueous
Formic_acid
Petrochemical process optimization method
Hydrogen pinch analysis (HPA) is a hydrogen management method that originates from the concept of heat pinch analysis. HPA is a systematic technique for
Hydrogen_pinch
Topics referred to by the same term
of hydrogen Hydrogen atom, about the physics of atomic hydrogen Hydrogen ion Hydron (chemistry), a.k.a. "proton" or "hydrogen" Isotopes of hydrogen Hydrogen-2
Hydrogen_(disambiguation)
Topics referred to by the same term
Potassium hydrogen phosphate Sodium hydrogen phosphate Phosphate This disambiguation page lists articles associated with the title Hydrogen phosphate
Hydrogen_phosphate
Gaseous state of the element hydrogen kept under pressure
Compressed hydrogen (CH2, CGH2 or CGH2) is the gaseous state of the element hydrogen kept under pressure. Compressed hydrogen in hydrogen tanks at 350
Compressed_hydrogen
Device used as a frequency standard
A hydrogen maser, also known as hydrogen frequency standard, is a specific type of maser that uses the intrinsic properties of the hydrogen atom to serve
Hydrogen_maser
Chemical compound
[C8H12IrP(C6H11)3C5H5N]PF6. It is a homogeneous catalyst for hydrogenation and hydrogen-transfer reactions, developed by Robert H. Crabtree. This air
Crabtree's_catalyst
A hydrogen clathrate is a clathrate containing hydrogen in a water lattice. This substance is interesting due to its possible use to store hydrogen in
Hydrogen_clathrate
Process of converting coal into liquid hydrocarbons
pyrolysis, and hydrogenation. Indirect liquefaction processes generally involve gasification of coal to a mixture of carbon monoxide and hydrogen, often known
Coal_liquefaction
Atom of the element hydrogen
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral hydrogen atom contains a single positively charged proton in the
Hydrogen_atom
Method to produce liquid hydrocarbons as fuel
method of production of liquid hydrocarbons for use as synthetic fuel by hydrogenation of high-volatile bituminous coal at high temperature and pressure. It
Bergius_process
Process of increasing the rate of a chemical reaction
in Noyori asymmetric hydrogenation: One of the most obvious applications of catalysis is the hydrogenation (reaction with hydrogen gas) of fats using nickel
Catalysis
Intermolecular attraction between a hydrogen donor-and-acceptor pair
In chemistry, a hydrogen bond (H-bond) is a specific type of molecular interaction that exhibits partial covalent character and cannot be described as
Hydrogen_bond
2012 novel by Iain Banks
The Hydrogen Sonata is a science fiction novel by Scottish author Iain M. Banks, set in his techno-utopian Culture universe. The hardcover edition was
The_Hydrogen_Sonata
Concept in metabolism
A hydrogen carrier is an organic macromolecule that transports atoms of hydrogen from one place to another inside a cell or from cell to cell for use in
Hydrogen_carrier
Deep-red spectral line of hydrogen
Hydrogen-alpha, typically shortened to H-alpha or Hα, is a deep-red visible spectral line of the hydrogen atom with a wavelength of 656.28 nm in air and
Hydrogen-alpha
Chemical compound
Hydrogen bromide is the inorganic compound with the formula HBr. It is a hydrogen halide consisting of hydrogen and bromine. A colorless gas, it dissolves
Hydrogen_bromide
Hypothetical class of star that develops from a red dwarf
much of its hydrogen fuel supply. Because red dwarfs fuse their hydrogen slowly and are fully convective (allowing their entire hydrogen supply to be
Blue_dwarf_(red-dwarf_stage)
Disputed concept in chemistry
Nascent hydrogen is an outdated concept in organic chemistry that was once invoked to explain dissolving-metal reactions, such as the Clemmensen reduction
Nascent_hydrogen
Cyclic chemical compound, (CH2)4O
by hydrogenation. DuPont developed a process, for producing THF by oxidizing n-butane to crude maleic anhydride, followed by catalytic hydrogenation. A
Tetrahydrofuran
Chemical catalyst
catalyst. While active for alkyne hydrogenation the FLP-based catalysts do not however facilitate the hydrogenation of alkenes to alkanes. The reaction
Frustrated_Lewis_pair
American chemist (1917–2012)
for their work in asymmetric synthesis, specifically for his work in hydrogenation reactions. The other half was awarded to K. Barry Sharpless for his
William_Standish_Knowles
Star at the centre of the Solar System
kilograms (kg) of hydrogen into helium and converts 4 billion kilograms of matter into energy. About 4 to 7 billion years from now, when hydrogen fusion in the
Sun
Hydrocarbon compound (CH4) in natural gas
through the Sabatier process. Methane is also a side product of the hydrogenation of carbon monoxide in the Fischer–Tropsch process, which is practiced
Methane
Device
A hydrogen analyzer is measurement instrument used to determine the concentration of hydrogen in gases, liquids or solid materials. It is used in industrial
Hydrogen_analyzer
Fuel from carbon monoxide and hydrogen
Pyrolysis and carbonization, and hydrogenation. One of the main methods of direct conversion of coal to liquids by hydrogenation process is the Bergius process
Synthetic_fuel
Solid hydrogen is the solid state of the element hydrogen. At standard pressure, this is achieved by decreasing the temperature below hydrogen's melting
Solid_hydrogen
Hydrogen transport involves the use of technology to transport hydrogen from the point of generation to the point of use. Hydrogen can be transported in
Hydrogen_transport
Hydrocarbon that transfers hydrogen to substrates
naphthalene by transfer of four hydrogens to the substrate. The enthalpy of hydrogenation of naphthalene is relatively low, which allows the tetrahydronaphthalene
Hydrogen-donor_solvent
Semi-solid oily spread often used as a butter substitute
such as palladium. If hydrogenation is incomplete (partial hardening), the relatively high temperatures used in the hydrogenation process tend to flip
Margarine
RL, Krische MJ (December 2007). "Catalytic C-C coupling via transfer hydrogenation: reverse prenylation, crotylation, and allylation from the alcohol or
Hydrogen_auto-transfer
Index of enzymes associated with the same name
Hydrogen ATPase commonly refers to: Hydrogen potassium ATPase, the gastric proton pump. Plasma membrane H+-ATPase V-ATPase, the synaptic vesicle transporter
Hydrogen_atpase
Topics referred to by the same term
Hydrogen battery may refer to: Nickel–hydrogen battery, a rechargeable battery with a power source based on nickel and hydrogen Hydrogen fuel cell, an
Hydrogen_battery
Chemical compound
Hydrogen selenide is an inorganic compound with the formula H2Se. This hydrogen chalcogenide is the simplest and most commonly encountered hydride of
Hydrogen_selenide
Simplest secondary alcohol
cordite preparation. It is produced through hydration of propene or hydrogenation of acetone, with modern processes achieving anhydrous alcohol through
Isopropyl_alcohol
Void between celestial bodies
particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays
Outer_space
City in South Korea
Currently, the Ulsan Green Hydrogen Town project, a hydrogen city that supplies hydrogen by connecting the city and a hydrogen power plant, is in progress
Ulsan
Chemical compound
ketones undergo hydrogenation, although conditions are forcing: 145 °C (500 psi). One obstacle to the use of Shvo's catalyst in the hydrogenation of alkynes
Shvo_catalyst
Chemical compound
2-diaminocyclohexane is produced by the hydrogenation of o-phenylenediamine. It is also side product in hydrogenation of adiponitrile. The racemic trans isomer
Trans-1,2-Diaminocyclohexane
Chemical reaction(s) which favor one chiral isomer over another
catalysts. A versatile example of enantioselective synthesis is asymmetric hydrogenation, which is used to reduce a wide variety of functional groups. The design
Enantioselective_synthesis
Oil extracted from seeds or from other parts of plants
hydrogenation, the oil's viscosity and melting point increase. While full hydrogenation produces largely saturated fatty acids, partial hydrogenation
Vegetable_oil
Compounds containing hydrogen
Hydrogen compounds are compounds containing the element hydrogen. In these compounds, hydrogen can form in the +1 and −1 oxidation states. Hydrogen can
Hydrogen_compounds
Anion, salt, functional group or ester derived from a phosphoric acid
dihydrogen phosphate ion H2PO−4 while removal of two protons gives the hydrogen phosphate ion HPO2−4. These names are also used in chemistry for salts
Phosphate
Chemical compound of hydrogen and oxygen
solvent. Water, being a polar molecule, undergoes strong intermolecular hydrogen bonding which is a large contributor to its physical and chemical properties
Water
Psychotropic state induced by breathing hydrogen at high partial pressures
Hydrogen narcosis (also known as the hydrogen effect – a rather ambiguous term) is the psychotropic state induced by breathing hydrogen at high partial
Hydrogen_narcosis
Hot foamy substance
toothpaste is a hot foamy substance caused by the quick decomposition of hydrogen peroxide (H2O2) using potassium iodide (KI) or yeast and warm water as
Elephant's_toothpaste
Chemical compound
Trioxidane (systematically named dihydrogen trioxide,), also called hydrogen trioxide is an inorganic compound with the chemical formula H2O3 or O(OH)2
Trioxidane
Catalyst composed of nickel and boron
"Catalytic hydrogenation. V. Reaction of sodium borohydride with aqueous nickel salts. P-1 nickel boride, a convenient, highly active nickel hydrogenation catalyst"
Nickel_boride_catalyst
Chemical compound
Triatomic hydrogen or H3 is an unstable triatomic molecule containing only hydrogen. Since this molecule contains only three atoms of hydrogen it is the
Triatomic_hydrogen
Negative ion of hydrogen
The hydrogen anion, H−, is a negative ion of hydrogen, that is, a hydrogen atom that has captured an extra electron. The hydrogen anion is an important
Hydrogen_anion
Isotope of hydrogen with two neutrons
Ancient Greek τρίτος (trítos) 'third'), or hydrogen-3 (symbol T or 3H), is a rare and radioactive isotope of hydrogen with a half-life of 12.32 years. The tritium
Tritium
Method of separating enantiomers in a racemic mixture by reaction rate
allylic alcohols by asymmetric hydrogenation of the olefin. Utilizing the Ru[BINAP] complex, selective hydrogenation can give high ee's of the unsaturated
Kinetic_resolution
Gas Detector
April 2018.{{cite web}}: CS1 maint: deprecated archival service (link) "Hydrogenation-induced insulating state in the intermetallic compound LaMg2Ni". biomedexperts
Hydrogen_sensor
Chemical compound
Fluoroantimonic acid is a mixture of hydrogen fluoride and antimony pentafluoride, containing various cations and anions, the simplest being fluoronium
Fluoroantimonic_acid
Aqueous solution of hydrogen chloride
also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungent smell
Hydrochloric_acid
Type of unsaturated fat
one of the original uses for fat hydrogenation. However, an isomerization side reaction during fat hydrogenation can convert remaining unsaturated fats
Trans_fat
Parody where water is presented by an uncommon name
misplaced fears. Sometimes other unfamiliar technical names are used: "hydrogen hydroxide", "dihydrogen oxide" and "hydric acid". In 1983, on April Fools'
Dihydrogen_monoxide_parody
Hydrogen Challenger was a 66-metre (216 ft 6 in) refitted coastal tanker (previously Bernd) for mobile hydrogen production. It was fitted with a vertical
Hydrogen_Challenger
enantioselective hydrogenation of ketones, methods for the hydrogenation of carbon–nitrogen double bonds are less general. Hydrogenation of imines is complicated
Hydrogenation of carbon–nitrogen double bonds
Hydrogenation_of_carbon–nitrogen_double_bonds
Empirical rule in organic chemistry
hydrogenation of alkenes to alkanes is exothermic. The amount of energy released during a hydrogenation reaction, known as the heat of hydrogenation,
Zaytsev's_rule
Type of airplane
A hydrogen-powered aircraft is an aeroplane that uses hydrogen fuel as a power source. Hydrogen can either be burned in a jet engine or another kind of
Hydrogen-powered_aircraft
Type of biofuel
hydrocracking or hydrogenation of vegetable oil or animal fat. Hydrocracking breaks big molecules into smaller ones using hydrogen while hydrogenation eliminates
Hydrotreated_vegetable_oil
American hydrogen aviation company
Universal Hydrogen was an American aerospace company. Founded in 2020, it was based in Los Angeles, aiming to create both a hydrogen-powered propulsion
Universal_Hydrogen
Atoms composed of exotic particles
shortens the muon's lifetime from 2.2 μs to only 0.08 μs. Muonic hydrogen is like normal hydrogen with the electron replaced by a negative muon, which is to
Exotic_atom
Chemical compound
Wilkinson's catalyst is used to promote the hydrogenation. The nitrile groups are unaffected. The degree of hydrogenation determines the kind of vulcanization
Nitrile_rubber
Primary alcohol compound (CH3CH2CH2OH)
hydrogenation of propionaldehyde. Propionaldehyde is produced via the oxo process by hydroformylation of ethylene using carbon monoxide and hydrogen in
1-Propanol
Chemical compound
ring. It is a typical naphthene in petroleum. It can be produced by hydrogenation of ethylbenzene and by hydrodeoxygenation of lignin. "Ethylcyclohexane"
Ethylcyclohexane
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