Energy & Green Tech
Members of the consortium running the U.K.'s first hydrogen blended gas project are hailing it as a success. The project, known as HyDeploy, has been running at Keele University, where both university buildings and homes ...
Energy & Green Tech
A Chinese research team has developed a new concept for extracting thermal energy from low-temperature waste heat sources and reusing it on demand simply by controlling the pressure.
Feb 17, 2023
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Energy & Green Tech
Researchers at the Fraunhofer-Gesellschaft have developed a technology for the energy-efficient and economic separation of hydrogen from natural gas. This membrane technology makes it possible for the two substances to be ...
Apr 1, 2021
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32
Energy & Green Tech
Though plants can serve as a source of food, oxygen and décor, they're not often considered to be a good source of electricity. But by collecting electrons naturally transported within plant cells, scientists can generate ...
Dec 13, 2022
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167
Energy & Green Tech
A new energy-efficient way to produce hydrogen gas from ethanol and water has the potential to make clean hydrogen fuel a more viable alternative for gasoline to power cars.
May 23, 2022
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Engineering
One of the promising alternatives to fossil fuels is methanol, in which the global shipping and logistics company Maersk, among others, is investing for its future fleet of container ships. However, there is a problem when ...
May 31, 2024
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Energy & Green Tech
Engineers at the University of Illinois Chicago have built a machine that captures carbon from flue gas and converts it to ethylene.
Dec 12, 2022
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141
Business
Over the past decades, the need for carbon-free energy has driven increasing interest in hydrogen as an environmentally clean fuel. But shifting the economy away from fossils fuels to clean-burning hydrogen will require significant ...
Jun 9, 2021
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13
Energy & Green Tech
Last night's Federal Budget did not have any promising signals for encouraging uptake of electric vehicles, or to increase spending on installing the essential infrastructure needed to allay fears that motorists won't be ...
May 12, 2021
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25
Energy & Green Tech
In the battle against climate change, green hydrogen is being hailed as a potential miracle fuel that could help the world's worst-polluting industries slash carbon emissions.
Dec 9, 2020
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Hydrogen (pronounced /ˈhaɪdrədʒən/) is the chemical element with atomic number 1. It is represented by the symbol H. At standard temperature and pressure, hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of 1.00794 u, hydrogen is the lightest element.
Hydrogen is the most abundant chemical element, constituting roughly 75% of the universe's elemental mass. Stars in the main sequence are mainly composed of hydrogen in its plasma state. Elemental hydrogen is relatively rare on Earth. Industrial production is from hydrocarbons such as methane with most being used "captively" at the production site. The two largest uses are in fossil fuel processing (e.g., hydrocracking) and ammonia production mostly for the fertilizer market. Hydrogen may be produced from water by electrolysis at substantially greater cost than production from natural gas.
The most common isotope of hydrogen is protium (name rarely used, symbol H) with a single proton and no neutrons. In ionic compounds it can take a negative charge (an anion known as a hydride and written as H−), or as a positively-charged species H+. The latter cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds always occur as more complex species. Hydrogen forms compounds with most elements and is present in water and most organic compounds. It plays a particularly important role in acid-base chemistry with many reactions exchanging protons between soluble molecules. As the only neutral atom with an analytic solution to the Schrödinger equation, the study of the energetics and bonding of the hydrogen atom played a key role in the development of quantum mechanics.
Hydrogen is important in metallurgy as it can embrittle many metals, complicating the design of pipelines and storage tanks. Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals. Hydrogen solubility in metals is influenced by local distortions or impurities in the crystal lattice.
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