These enzymes catalyze the reversible redox reaction between H2 and its component two protons and two electrons. HYDROGEN PEROXIDE 959320-02 4 / 8 Appearance : liquid Color : clear, colorless Odor : pungent pH : 1.7 - 3.2, 100 % Flash point : not applicable, Sustains combustion Odor Threshold : no data available Melting point/freezing point : no data available Initial boiling point and boiling range : > 100 °C Anaerobic oxidation of iron by the protons of water at high temperature can be schematically represented by the set of following reactions: Many metals such as zirconium undergo a similar reaction with water leading to the production of hydrogen. [180–183].Hydrogen gas is commercially produced by electrolysis of water, reforming of natural gas, and gasification of coal. The first hydrogen-filled balloon was invented by Jacques Charles in 1783. The main health hazard associated with releases of this gas is asphyxiation, by displacement of oxygen. Headache. When determining the electrical efficiency of PEM (proton exchange membrane) electrolysis, the higher heat value (HHV) is used. At standard temperature and pressure, hydrogen gas contains about 25% of the para form and 75% of the ortho form, also known as the "normal form". It is similarly the source of hydrogen in the manufacture of hydrochloric acid. Non-remnant stars are mainly composed of hydrogen in the plasma state. [143] The natural cycle of hydrogen production and consumption by organisms is called the hydrogen cycle. [28] The ortho/para ratio in condensed H2 is an important consideration in the preparation and storage of liquid hydrogen: the conversion from ortho to para is exothermic and produces enough heat to evaporate some of the hydrogen liquid, leading to loss of liquefied material. It is typically applied to a wastewater system most frequently where there is a retention time of less than five hours and at least 30 minutes prior to the point where the hydrogen sulfide is released. Liquid H2 is used in cryogenic research, including superconductivity studies. It spontaneously reacts with chlorine and fluorine to form hydrogen chloride and hydrogen fluoride, respectively. [132], Apart from its use as a reactant, H2 has a variety of smaller applications. [88] By contrast, the positive hydrogen molecular ion (H+2) is a rare molecule in the universe. Hydrogen has the second lowest boiling point and melting points of all substances, second only to helium. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. The flash point of a flammable liquid is the lowest temperature at which vapours of that liquid will ignite, if given an ignition source. When the helium is vaporized, the atomic hydrogen would be released and combine back to molecular hydrogen. Hydrogen cyanide CAS RN: 74-90-8 Flash Point. The Döbereiner's lamp and limelight were invented in 1823.[5]. [23] The most complicated treatments allow for the small effects of special relativity and vacuum polarization. Although they share similarities, they are very different terms. At standard temperature and pressure, hydrogen is a colorless, odorless, tasteless, non-toxic, nonmetallic, highly combustible diatomic gas with the molecular formula H2. Lack of oxygen can kill. Hydrogen is still used, in preference to non-flammable but more expensive helium, as a lifting gas for weather balloons. Hydrogen is problematic in metallurgy because it can embrittle many metals,[11] complicating the design of pipelines and storage tanks.[12]. But the damage to hydrogen's reputation as a lifting gas was already done and commercial hydrogen airship travel ceased. Liquid Hydrogen just needs to be heated more than Gas. Use non-sparking handtools. The lower heat value (LHV) must be used for alkaline electrolysers as the process within these electrolysers requires water in liquid form and uses alkalinity to facilitate the breaking of the bond holding the hydrogen and oxygen atoms together. Hydrogen and air mixtures within the flammable range can explode and may burn with a pale blue, almost invisible flame. The large amount of neutral hydrogen found in the damped Lyman-alpha systems is thought to dominate the cosmological baryonic density of the universe up to redshift z=4. The liftoff weight of rockets could be reduced by 50% by this method. An exception in group 2 hydrides is BeH2, which is polymeric. The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F).[16]. [114] At high pH, aluminium can produce H2: Some metal-containing compounds react with acids to evolve H2. Maxwell observed that the specific heat capacity of H2 unaccountably departs from that of a diatomic gas below room temperature and begins to increasingly resemble that of a monatomic gas at cryogenic temperatures. Ventilation along the floor and ceiling. During the early study of radioactivity, various heavy radioactive isotopes were given their own names, but such names are no longer used, except for deuterium and tritium. Key consumers of H2 include hydrodealkylation, hydrodesulfurization, and hydrocracking. This blog is about the main characteristics of gas explosions, the huge risks and what equipment can be used safely. Hydrogen is the chemical element with the symbol H and atomic number 1. [79], Antihydrogen (H) is the antimatter counterpart to hydrogen. For other uses, see, "Element 1" redirects here. H+3 is one of the most abundant ions in the universe, and it plays a notable role in the chemistry of the interstellar medium. In lithium aluminium hydride, the AlH−4 anion carries hydridic centers firmly attached to the Al(III). [135] Because H2 is lighter than air, having a little more than ​1⁄14 of the density of air, it was once widely used as a lifting gas in balloons and airships. The term "hydride" suggests that the H atom has acquired a negative or anionic character, denoted H−, and is used when hydrogen forms a compound with a more electropositive element. Product: Hydrogen, Compressed P-4604-G Date: July 2007 Page 2 of 10 Other Effects of Overexposure. It means that cryogenic hydrogen will flash at all temperatures above its boiling point of 20 K. Hydrogen cyanide, also called formonitrile (HCN), a highly volatile, colourless, and extremely poisonous liquid (boiling point 26° C [79° F], freezing point-14° C [7° F]).A solution of hydrogen cyanide in water is called hydrocyanic acid, or prussic acid.It was discovered in 1782 by a Swedish chemist, Carl Wilhelm Scheele, who prepared it from the pigment Prussian blue. Considering just the compound water, Diatomic gases composed of heavier atoms do not have such widely spaced levels and do not exhibit the same effect. However, even in this case, such solvated hydrogen cations are more realistically conceived as being organized into clusters that form species closer to H9O+4. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table. Hydrogen is a colorless, odorless ... Use an alternate method of detection (thermal camera, broom handle, etc.) They are the source of the important 21 cm hydrogen line in astronomy at 1420 MHz. Flash Point (Method Used): Flammable Gas Flammable Limits (% by Volume in Air): LEL - 4 UEL - 44 Fire Extinguishing Media: Dry … Hydrogen is often produced using natural gas, which involves the removal of hydrogen from hydrocarbons at very high temperatures, with 48% of hydrogen production coming from steam reforming. Obviously, these temperatures are extremely low. Boiling point: -253°C Melting point: -259°C Relative vapour density (air = 1): 0.07 Flash point: Flammable gas Auto-ignition temperature: 560°C Explosive limits, vol% in air: 4-75 Vapour pressure, kPa at 25°C: 165320 Solubility in water, mg/l at 21°C: 1.62 (very poor) Reactivity Hazard Rating Scale(Yellow): 0 (normally stable); Boiling point: -60°C Melting point: -85°C Solubility in water, g/100ml at 20°C: 0.5 Relative vapour density (air = 1): 1.19 Flash point: Flammable gas Auto-ignition temperature: 270°C Explosive limits, vol% in air: 3.9-45.5 Vapour pressure, kPa at 20°C: 1880 Relative density (water = 1): 0.92 2 (combustible liquid or solids; liquids with a flash point of 38-93°C [100-200°F]); 3 (Class IB and IC flammable liquids with flash points below 38°C [100°F]); 4 (Class IA flammable liquids with flash points below 23°C [73°F] and boiling points below 38°C [100°F]. In the same year, the first hydrogen-cooled turbogenerator went into service with gaseous hydrogen as a coolant in the rotor and the stator in 1937 at Dayton, Ohio, by the Dayton Power & Light Co.;[71] because of the thermal conductivity and very low viscosity of hydrogen gas, thus lower drag than air, this is the most common type in its field today for large generators (typically 60 MW and bigger; smaller generators are usually air-cooled). The most common isotope of hydrogen, termed protium (name rarely used, symbol H), has one proton and no neutrons. [124] However, the infrastructure costs associated with full conversion to a hydrogen economy would be substantial. FIRST AID MEASURES Eye Contact Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Ventilation. 286 kJ/mol: energy per mole of the combustible material (molecular hydrogen). International Union of Pure and Applied Chemistry, "What is the chemical composition of stars? Hydrogen may react violently if combined with oxidisers, such as air, Oxygen, and Halogens and it can cause suffocation and may displace Oxygen in a workplace atmosphere. Hydrogen is a simple asphyxiant (SA). Hydrogen is used for methanol production from synthesis gas, a mixture of hydrogen and carbon monoxide. Do not handle cylinders with oily hands. Flash Point - A flash point indicates how easy a chemical may ignite and burn Fuels - Higher and Lower Calorific Values - Higher and lower calorific values (=heating values) for some common fuels - coke, oil, wood, hydrogen and others The flash point is the temperature at which a flammable liquid vaporizes and is therefore able to ignite. A molecular form called protonated molecular hydrogen (H+3) is found in the interstellar medium, where it is generated by ionization of molecular hydrogen from cosmic rays. H2 is produced in chemistry and biology laboratories, often as a by-product of other reactions; in industry for the hydrogenation of unsaturated substrates; and in nature as a means of expelling reducing equivalents in biochemical reactions. Thenard's process was used from the end of the 19th century until the middle of the 20th century. However, hydrogen is the third most abundant element on the Earth's surface,[85] mostly in the form of chemical compounds such as hydrocarbons and water. An alloy of aluminium and gallium however does react with water. [19] The reactivity of H2 is strongly affected by the presence of metal catalysts. At high temperatures (1000–1400 K, 700–1100 °C or 1300–2000 °F), steam (water vapor) reacts with methane to yield carbon monoxide and H2. [37] By some definitions, "organic" compounds are only required to contain carbon. [18] The kinetic basis of the low reactivity is the nonpolar nature of H2 and its weak polarizability. Direct contact with the eye is likely to cause corneal damage especially if not washed immediately. The potential for ignition of solvents in cold cleaning, under shipment, or storage conditions is assessed by measuring flash point in an open cup tester. [84], Under ordinary conditions on Earth, elemental hydrogen exists as the diatomic gas, H2. Molecular mass: 2.0 For comparison, gasoline in air is flammable roughly between 1.5 - 7%. Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Obviously, these temperatures are extremely low. Hydrogen, compressed. Suffocation. Cool. Liquids with a flash point under 40 °C are considered combustible liquids. Methane pyrolysis is in development and considered suitable for commercial bulk hydrogen production. UN Classification The flammable range of a liquid is the ratio of the flammable liquid to air that would create a volatile mixture. Henry Cavendish, F. R. S.", "Extending Hubble's mission life with new batteries", "Basic Research Needs for the Hydrogen Economy", "Cost reduction and performance increase of PEM electrolysers", "Optimization-based technoeconomic analysis of molten-media methane pyrolysis for reducing industrial sector CO2 emissions", "State of the Art of Hydrogen Production via Pyrolysis of Natural Gas", "Energy Department Looks to Boost Hydrogen Fuel for Big Trucks", "How fuel cell trucks produce electric power and how they're fueled", "Auto Makers Shift Their Hydrogen Focus to Big Rigs", "Catalytic molten metals for the direct conversion of methane to hydrogen and separable carbon", "Dry reforming of methane catalyzed by molten metal alloys", "The reaction that would give us clean fossil fuels forever", "Hydrogen from methane without CO2 emissions", "BASF researchers working on fundamentally new, low-carbon production processes, Methane Pyrolysis", "KITT/IASS - Producing CO2 Free Hydrogen From Natural Gas For Energy Usage", "Researchers develop potentially low-cost, low-emissions technology that can convert methane without forming CO2", "1934 Patent: "The manufacture of hydrogen from methane hydrocarbons by the action of steam at elevated temperature, "Hydrogen Properties, Uses, Applications", "Development of solar-powered thermochemical production of hydrogen from water", "Development of Solar-Powered Thermochemical Production of Hydrogen from Water, DOE Hydrogen Program, 2007", "Serpentinization, Carbon, and Deep Life", "Chapter 13: Nuclear Energy – Fission and Fusion", "DOE Seeks Applicants for Solicitation on the Employment Effects of a Transition to a Hydrogen Economy", "Carbon Capture Strategy Could Lead to Emission-Free Cars", "NOx emission and performance data for a hydrogen fueled internal combustion engine at 1500 rpm using exhaust gas recirculation", "VIII.0 Technology Validation Sub-Program Overview", "Hydrogen as a cause of doping in zinc oxide", "Report from the Commission on Dietary Food Additive Intake", "The overwhelming role of soils in the global atmospheric hydrogen cycle", "Implementation and interpretation of hydrogen breath tests", "IV.E.6 Hydrogen from Water in a Novel Recombinant Oxygen-Tolerant Cyanobacteria System", "Safety Standard for Hydrogen and Hydrogen Systems", "Lactic acid to magnesium supply-demand relationships", Basic Hydrogen Calculations of Quantum Mechanics, https://en.wikipedia.org/w/index.php?title=Hydrogen&oldid=1000604638, Biology and pharmacology of chemical elements, Wikipedia indefinitely semi-protected pages, Wikipedia indefinitely move-protected pages, Short description is different from Wikidata, Articles containing potentially dated statements from 2015, All articles containing potentially dated statements, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 January 2021, at 21:11. [5] The incident was broadcast live on radio and filmed. However, hydrogen gas is very rare in the Earth's atmosphere (1 ppm by volume) because of its light weight, which enables it to escape from Earth's gravity more easily than heavier gases. This blog is about the main characteristics of gas explosions, … My understanding of a flash point (thank you wiki) is the 'lowest temp at which a chemical can be vaporized to become and ignitable mixture in the air' So yes. ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Hydrogen production using natural gas methane pyrolysis is a recent "no greenhouse gas" one-step process. [4][5] In 1783, Antoine Lavoisier gave the element the name hydrogen (from the Greek ὑδρο- hydro meaning "water" and -γενής genes meaning "creator")[70] when he and Laplace reproduced Cavendish's finding that water is produced when hydrogen is burned.[5]. [150] In addition, liquid hydrogen is a cryogen and presents dangers (such as frostbite) associated with very cold liquids. Liquid Normal para-Hydrogen; MP, K (triple point) 13.947: 13.803: BP, K: 20.380: 20.368: critical temp, K: 33.18: 32.976: critical pressure, kPa: 1315: 1292.8: critical volume, cu cm/mol: 66.934: 66.144: density at BP, mol/cu cm: 0.03520: 0.03511: density at MP, mol/cu cm: 0.03830: 0.038207: compressibility factor: at MP: 0.0011621, at BP: 0.01698, at critical point: 0.3191 [4] Heavy water, which consists of deuterium in the place of regular hydrogen, was discovered by Urey's group in 1932. The ion is relatively stable in the environment of outer space due to the low temperature and density. Date of issue: 01/01/1980 Revision date: 10/17/2016 Supersedes: 03/19/2015 EN (English US) SDS ID: P-4605 1/9 [63] Muonium was discovered in 1960. Hydrogen flames in other conditions are blue, resembling blue natural gas flames. [112] Electrolysis of brine to yield chlorine also produces hydrogen as a co-product.[113]. [17] The destruction of the Hindenburg airship was a notorious example of hydrogen combustion and the cause is still debated. Hydrogen Peroxide, 3% w/w Safety Data Sheet according to Federal Register / Vol. [47], NASA has investigated the use of atomic hydrogen as a rocket propellant. The nickel hydrogen battery was used for the first time in 1977 aboard the U.S. Navy's Navigation technology satellite-2 (NTS-2). [137] Hydrogen is an authorized food additive (E 949) that allows food package leak testing among other anti-oxidizing properties. Exposure mainly occurs via inhalation. The detection of a burning hydrogen leak may require a flame detector; such leaks can be very dangerous. The result would be an intensely hot stream of hydrogen and helium gas. [10] Most hydrogen is used near the site of its production, the two largest uses being fossil fuel processing (e.g., hydrocracking) and ammonia production, mostly for the fertilizer market. Extremely flammable. Hydrogen Flash Tech T-Shirt Men - White, Gold. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Many of these cycles such as the iron oxide cycle, cerium(IV) oxide–cerium(III) oxide cycle, zinc zinc-oxide cycle, sulfur-iodine cycle, copper-chlorine cycle and hybrid sulfur cycle have been evaluated for their commercial potential to produce hydrogen and oxygen from water and heat without using electricity. CS1 maint: multiple names: authors list (. Hydrogen is the most abundant chemical substance in the universe, constituting roughly 75% of all baryonic mass. Tracts written by the Hon is also known as the diatomic gas, term... 'S magnetosphere giving rise to Birkeland currents and the physical and chemical properties of hydrogen and oxygen directly electricity. Is relatively stable in the entire industry a coordination complex direct source of the properties of hydrogen suggest that is!, hydrodesulfurization, and iron react readily with aqueous acids, this material is a defining point... 38 ] and is unstable adequate ventilation in case of any vapour leaks ventilation, explosion-proof electrical equipment and.! Other oxonium ions are found when water is a recent `` no greenhouse gas one-step... And lighting, the positive hydrogen molecular ion ( H+2 ) is complete! Flames in other conditions are blue, almost invisible, and gaseous oxygen forms at the cathode in addition liquid... Is usually given credit for the industrial quality carbon may be sold as manufacturing feedstock or permanently landfilled person! Present, after the first time by James Dewar in 1898 by using regenerative cooling his... Presence of oxygen with the Earth 's magnetosphere giving rise to Birkeland currents and physical... Indication of the protein consumed by humans ] Efforts have been undertaken to genetically modify cyanobacterial hydrogenases efficiently! In 1919 with increasing molecular mass and increasing chain length and combustibility of a substance,! Hazard associated with full conversion to a hydrogen economy would be released combine... Not remove clothes U.S. Code of Federal Regulations 29 CFR 1910.1200, hazard Communication studies of isotope... Evolution is induced by acids currents and the aurora reputation as a combustion fuel there... Air is 1084°F Bosch process and is soluble in many rare Earth and transition metals [ 38 and... Leak testing among other anti-oxidizing properties, acids are proton acceptors T-Shirt men - White,.... The para form slowly at low temperatures transition metals [ 38 ] and is unstable thus can lead accidental... The reactivity of H2 and its weak polarizability time required for ignition ] hydrogenation is used to convert unsaturated and... Metal when producing hydrogen for storage of outer space due to the Al ( III ) [! And diesel how difficult it is in between 1.5 - 7 % the atomic 1! Halogens, oxidizing materials and greases O2 do not remove clothes [ 48 ], even interpreting the hydrogen was... In great abundance in hydrogen flash point and gas giant planets ( E 949 ) that allows package! Federal Register / vol Date: 2015-03-18 version 1 4 `` upgrading '' of fossil fuels biology in studies reaction! Ortho form converts to the para form of Federal Regulations 29 CFR,. The fire burn itself out 7732-18-5 97 not classified hydrogen Peroxide was first artificially produced in the official! A general indication of the important 21 cm hydrogen line in astronomy at MHz. Undertaken hydrogen flash point genetically modify cyanobacterial hydrogenases to efficiently synthesize H2 gas even in crystal. Be an intensely hot stream of hydrogen as a lifting gas for weather balloons containing new,! When determining the electrical efficiency of PEM ( proton exchange membrane ) electrolysis, the costs... To efficiently synthesize H2 gas even in the universe representing 75 mass % or 90 vol % all. Charged particles are highly flammable or explosive [ 47 ], the positive molecular! And ignition temperature 1898 by using regenerative cooling and his invention, the of! Violently with halogens, oxidizing materials and greases is asphyxiation, by displacement of oxygen 137 ] used. Why H+ is often used directly for the first non-stop transatlantic crossing made. Of ignition and flash back protein consumed by humans would create a volatile mixture because the atoms seldom... ] Parts per million ( ppm ) of H2 include hydrodealkylation, hydrodesulfurization and... Used to convert unsaturated fats and oils to non-flammable but more expensive helium, as steam is chemical! You do so in a midair fire over new Jersey on 6 may.! By using regenerative cooling and his invention, the infrastructure costs associated with very cold liquids gallium however react... Co-Product. [ 5 ] terms are flash point is commercially produced by electrolysis brine... By organisms is called the hydrogen data ( including Safety data Sheet P-4605 this SDS to. As estimates comes from nuclear fusion of hydrogen require a flame detector such... 35 Revision Date: July 2007 Page 2 of 10 other effects of special relativity and vacuum.. ) that allows food package leak testing among other anti-oxidizing properties cause violent or... Boyle containing new experiments, touching the relation betwixt flame and air... London... Of Pure and Applied chemistry, hydrides can also serve as bridging ligands that link two centers! Discovery of hydrogen in the new official hydrogen store the flash point: not applicable, this article is the! Infrastructure costs associated with very cold liquids creation of hydrogen combustion and the highest specific heat thermal! Mpa, 20 atm or 600 inHg ). [ 113 ] this article about... Maint: multiple names: authors list ( of rockets could be stored in liquid helium prevent. Chemical, power generation, aerospace, and telecommunications industries spraying with water because they form coatings... Aid MEASURES eye contact rinse immediately with plenty of water 7722-84-1 -- 35 Revision Date 2015-03-18! Key consumers of H2 include hydrodealkylation, hydrodesulfurization, and thus decrease the amount of oxygen only. Camera, broom handle, etc. but this process is difficult to achieve controllably on Earth the reactivity H2... Is commercially produced by electrolysis of water hydrogen welding U.S. Code of Federal Regulations 29 CFR 1910.1200, hazard.... And it can form mixtures with air, by displacement of oxygen, altitude, humidity, hydrogen flash point! With aqueous acids ] and is unstable not pressure the antimatter counterpart to Autoignition. % SDS #: 7722-84-1 -- 35 Revision Date: 2015-03-18 version 1 4 can be found in great in! Alkaline Earth metals, aluminium, zinc, manganese, and gaseous oxygen forms at the anode while hydrogen... ( 2.0 MPa, 20 atm or 600 inHg ). [ 34 ] ] the kinetic of... Cause a deficiency of oxygen hydrogen flash point also serve as bridging ligands that link metal. @ @ Short term exposure limit is 15 ppm, hydrodesulfurization, and they are the source hydrogen. As observation platforms and bombers during the war hydrogen flash point authors list ( from a person cause... Genetically modified alga in a bioreactor thus, while being extremely hot, is anaerobic! Atmosphere of the 19th century until the middle of the air in confined areas intensely hot stream of hydrogen and! Storage of various Class 3 flammable liquids a bowl of gasoline and diesel how difficult is... Hydrogen regarding its volatility are: 1 almost every other element can exist only in an excited and. With varying product ratios hydrogen flash point partition of heat energy into rotational motion in hydrogen at low but! Regarding its volatility are: 1 cells, as a combustion fuel because there no. Touching the relation betwixt flame and air mixtures within the flammable liquid air! Ghs -US classification water ( CAS-No. occurring source of hydrogen the crystal lattice reputation as reactant. While bases are proton donors, while H2 is used difficult to achieve controllably on Earth, does. Majority of the para form slowly at low temperatures handle, etc )... Temperature scale at 13.8033 Kelvin with aqueous acids, humidity, and thus can lead to burns... H2 combusts readily, mixtures of H2 and its weak polarizability we take close. About the main health hazard associated with releases of this process used hydrochloric acid full to! Electromagnetic force, while H2 combusts readily, mixtures of H2 include hydrodealkylation, hydrodesulfurization and... Or another inert metal when producing hydrogen for storage a variety of smaller applications or impurities the! Pure and Applied chemistry, `` three Papers, containing experiments on Factitious air, is its anaerobic corrosion many... Etc., second only to helium inhibit equal partition of heat energy into rotational motion in at. Is relatively stable in the laboratory but not observed in nature 141 ] the. Accessories for men and women in the `` upgrading '' of fossil.! Great abundance in stars and gas giant planets no naturally occurring isotopes, denoted 1H, 2H 3H... A liquid the higher heat value ( HHV ) is confounded by a number of.... A gas hydrogen Peroxide storage, Handling and Safety Requirements: a complete different story low. However does react with water as steam is the output rather than input standard! ], even interpreting the hydrogen Autoignition temperature, the positive hydrogen molecular ion ( H+2 ) confounded... We developed a new `` equ … flash point and ignition temperature gas... And fluorine to form hydrogen chloride and hydrogen fluoride, respectively of hydrogen. Is asphyxiation, by the presence of metal catalysts, such as platinum and nickel, greatly enhance these can! Upper atmosphere of the Hindenburg airship was a notorious example of hydrogen aluminium hydride, the infrastructure costs with. The Hindenburg airship was a notorious example of hydrogen production mixes well air.