Hydrogen gas can be generated by reacting an active metal with dilute acid, reacting Al or Zn with a strong base, or industrially by catalytic steam reforming, which produces synthesis gas, or syngas. 22.2: Hydrogen is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts.
Hydrogen is a clean fuel that, when consumed in a fuel cell, produces only water. Hydrogen can be produced from a variety of domestic resources, such as natural gas, nuclear power, biomass, and renewable power like solar and wind.
Hydrogen can be produced from diverse, domestic resources. Currently, most hydrogen is produced from fossil fuels, specifically natural gas. Electricity—from the grid or from renewable sources such as wind, solar, geothermal, or biomass—is also currently used to produce hydrogen. In the longer term, solar energy and biomass can be used more
Hydrogen can be produced using many different feedstocks, energy sources, and processes, and DOE funds research on many different ways of producing clean
A synthesis gas can also be created by reacting coal or biomass with high-temperature steam and oxygen in a pressurized gasifier. This converts the coal or biomass into gaseous components—a process called gasification. The resulting synthesis gas contains hydrogen and carbon monoxide, which is reacted with steam to separate the hydrogen.
Just the facts. Atomic number (number of protons in the nucleus): 1. Atomic symbol (on the Periodic Table of Elements): H. Atomic weight (average mass of the atom): 1.00794. Density: 0.00008988
OverviewApplicationsPropertiesHistoryCosmic prevalence and distributionProductionBiological reactionsSafety and precautions
Large quantities of H2 are used in the "upgrading" of fossil fuels. Key consumers of H2 include hydrodesulfurization, and hydrocracking. Many of these reactions can be classified as hydrogenolysis, i.e., the cleavage of bonds by hydrogen. Illustrative is the separation of sulfur from liquid fossil fuels: R2S + 2 H2 → H2S + 2 RH
Hydrogen can be produced domestically from resources like natural gas, coal, solar energy, wind, and biomass. When used to power highly efficient fuel cell electric vehicles, hydrogen holds the promise of helping strengthen national energy security, conserve petroleum, and diversify our transportation energy options for a more resilient system.
Hydrogen is an energy carrier. Energy carriers transport energy in a usable form from one place to another. Elemental hydrogen is an energy carrier that
Gas—Hydrogen can be stored as a gas in large volumes in natural geological formations—salt caverns, lined hard rock caverns, depleted oil and natural gas fields, and aquifers. Gaseous hydrogen may also be stored in relatively smaller volumes in pressurized, stationary or portable tanks, and in dedicated hydrogen gas pipeline
A massive scale-up is underway. According to McKinsey, an estimated 130 to 345 gigawatts (GW) of electrolyzer capacity will be necessary to meet the green
Hydrogen. Hydrogen is the lightest chemical element and the most abundant chemical substance in the universe. Using fossil fuels or clean electricity, we can produce hydrogen gas, which can be stored, transported, and burned to provide power. Unlike most fuels, hydrogen does not produce the greenhouse gas carbon dioxide (CO 2) when burned
Hydrogen is a clean alternative to methane, also known as natural gas. It''s the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Here on earth, vast numbers of
It can be transported as a gas by pipelines or in liquid form by ships, much like liquefied natural gas (LNG). It can be transformed into electricity and methane to power homes and feed industry, and into fuels for cars, trucks, ships and planes. Hydrogen can enable renewables to provide an even greater contribution.
Hydrogen gas is generally inert and not flammable at a concentration less than 4.7% in air, although it is highly flammable at higher concentrations.1,2 Inhalational method of delivery provides a simple and practical strategy to administer hydrogen gas at different concentrations (1%, 1.3%, 2%, 4%) through a ventilator circuit/face mask
Like any gas, hydrogen can be compressed and stored in tanks, then used as needed. However, the volume of hydrogen is much larger than that of other hydrocarbons; nearly four times as much as
Hydrogen is a naturally occurring gas, and it is the most abundant substance in the universe. (The word in Greek means "water former" because hydrogen creates water when burned.) For example, green hydrogen can be produced from 100 percent solar and wind power in renewables-rich regions and delivered to any refueling
But green hydrogen costs about $5 per kilogram, more than twice as much as gray hydrogen, which tends to track the price of natural gas. Cheaper electrolyzers will help—DOE is sponsoring a "moonshot" to reach $1 per kilogram within a decade. But green hydrogen would also require a huge scale-up of renewable electricity.
Hydrogen gas is produced by several industrial methods. Nearly all of the world''s current supply of hydrogen is created from fossil fuels.: 1 Most hydrogen is gray hydrogen made through steam methane reforming this process, hydrogen is produced from a chemical reaction between steam and methane, the main component of natural gas.Producing