OUR GREAT MINDS

    by Tina Olivero

    Understanding GREEN HYDROGEN: Gas, Liquid and Solid

    Green hydrogen is a type of hydrogen that is produced through the electrolysis of water using renewable energy sources such as solar or wind power. This process is known as “green” hydrogen production because it does not produce any greenhouse gas emissions.

    There are several forms that green hydrogen can take:

    • Gas: Green hydrogen can be produced and stored as a gas. This is the most common form of hydrogen and it can be easily transported and used as a fuel for a variety of applications, such as heating buildings or powering vehicles.
    • Liquid: Green hydrogen can also be produced and stored as a liquid, typically in a cryogenic tank. This form of hydrogen is easier to transport and handle than gas, but it requires special equipment and infrastructure to store and use.
    • Solid: Green hydrogen can also be produced and stored as a solid, typically in the form of a metal hydride. This form of hydrogen has the advantage of being highly compact and stable, but it requires special equipment to release the hydrogen for use.

    GREEN HYDROGEN GAS

    Green hydrogen gas is produced through a process called electrolysis. In electrolysis, electricity is used to split water into constituent elements of hydrogen and oxygen. The electricity for this process can be generated from a variety of renewable energy sources, such as solar or wind power, which is why it is called “green” hydrogen.

    Here is a basic overview of the process of producing green hydrogen gas through electrolysis:

    1. Water is electrolyzed in an electrolyzer, which is a device that uses electricity to split water into hydrogen and oxygen.
    2. The electrolyzer is powered by renewable electricity, such as solar or wind power.
    3. The hydrogen gas produced during electrolysis is then purified and stored for use as a fuel.
    4. The oxygen gas produced during electrolysis is typically released into the atmosphere.

    Overall, the process of producing green hydrogen gas through electrolysis is a clean and efficient way to produce hydrogen fuel, as it does not produce any greenhouse gas emissions.

    GREEN HYDROGEN LIQUID

    Green hydrogen liquid is produced through a process called liquefaction. In liquefaction, hydrogen gas is cooled and pressurized until it becomes a liquid. This process is typically carried out at temperatures below -253°C (-423°F) and pressures above 70 bar (7000 kPa).

    To produce green hydrogen liquid, the process of electrolysis is used to produce green hydrogen gas, as described in my previous message. The green hydrogen gas is then cooled and pressurized until it becomes a liquid.

    One advantage of green hydrogen liquid is that it is easier to transport and handle than hydrogen gas, as it is denser and more stable. It can be stored in cryogenic tanks and transported via tanker trucks or ships. However, it requires special equipment and infrastructure to store and use, as it must be kept at very low temperatures to remain a liquid.

    Overall, the process of producing green hydrogen liquid involves the production of green hydrogen gas through electrolysis, followed by liquefaction to produce the liquid form.

    GREEN HYDROGEN SOLIDS

    Green hydrogen solids are produced through a process called hydrogenation. In hydrogenation, hydrogen gas is reacted with a solid material to form a solid compound containing hydrogen. This process can be carried out at room temperature and pressure, and it does not produce any greenhouse gas emissions.

    One common method of producing green hydrogen solids is to react green hydrogen gas with metals or metal alloys to form metal hydrides. Metal hydrides are solid compounds that can store large amounts of hydrogen in a compact and stable form. They can be produced through a process called dehydrogenation, in which the metal hydride is heated to release the hydrogen gas.

    To produce green hydrogen solids, the process of electrolysis is used to produce green hydrogen gas, as described in my previous messages. The green hydrogen gas is then reacted with a solid material to form a solid compound containing hydrogen.

    Overall, the process of producing green hydrogen solids involves the production of green hydrogen gas through electrolysis, followed by hydrogenation to produce the solid form.

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