Under normal conditions of temperature and pressure, hydrogen is a colorless and odorless gas, lighter than air. It is soluble in water up to 1.6 mg/L at 21°C. Depending on its temperature and pressure, it can be found in different states: gaseous, liquid, solid, metallic and triatomic. Here, we will only concentrate on hydrogen in its gaseous state. 

Made famous for using its atom in the process of nuclear fusion, hydrogen is historically used in several other applications:

• Chemical industry
  - Production of ammonia and other fertilizers

• Petrochemical industry
  - Sulfur removal
  - Process of creation of gasoline and diesel by hydrocracking
  - Methanol production (synthesis of amines and alkanes by hydrogenation)

• Food industry
  - Production of margarine & butter by fat hydrogenation

• Welding
  - Atomic Hydrogen Welding (or plasma)

• Glass production
  - As antioxidant or shielding gas when coupled with nitrogen

• Electronics manufacturing
  - Production of semiconductors, LEDs, displays, etc

• Space exploration
  - Rockets' engines (liquid form)

Today and thanks to the constant development of technologies of production of hydrogen by steam reforming (''grey'' and ''blue hydrogen'') and especially hydrogen electrolysis (''green hydrogen'' under certain conditions), hydrogen is increasingly seen as the vector that will enable a much needed change in the world's energy production and consumption patterns. In fact, it provides an alternative solution to the problem of electricity storage, which has long been an obstacle to the development of ''cleaner'', CO₂ neutral technologies.

Therefore, new ways of producing and using hydrogen have emerged: 

• Power generation – Green Hydrogen production via electrolysis process
  - "Power-to-Gas-to-Power" plants (P2G2P)
  - Electricity provided by renewable sources such as wind turbines, photovoltaic panels and others

• Green mobility, to reduce CO₂ footprint
  - Fuel cells (Fuel cells are devices that convert hydrogen into electrical energy. They are similar to batteries in that they generate electricity through an electrochemical process, but unlike batteries, fuel cells do not run out of energy and can continuously generate electricity as long as they are supplied with a fuel source and oxygen. Fuel cells are highly efficient and produce electricity with little to no emissions, making them a promising technology for clean energy production. One of the most well-known applications of fuel cells is in transportation. Fuel cell vehicles (FCVs) are powered by hydrogen fuel cells, which generate electricity to power the vehicle's electric motor.)

REFERENCE - HPR-DRY Ex 350

The problem with hydrogen today is its cost and efficiency, especially when produced by electrolysis. But with the help of the governments and the rapid development of the industry calling for more innovations, there is no doubt that these costs will decrease in the very near future, and that hydrogen consumption will increase significantly.

Compressed Hydrogen Dryers - H2 Dryers