Hydrogen is a colorless gas with a lower density than air (among various gases, hydrogen has the lowest density. Under standard conditions, the mass of 1 liter of hydrogen is 0.0899 grams, which is much lighter than air in the same volume). Because hydrogen is difficult to dissolve in water, it can be collected using the drainage gas collection method. In addition, at a pressure of 101 kPa and a temperature of -252.87 ℃, hydrogen gas can transform into a colorless liquid- At 259.1 ℃, it turns into a snowy solid. At room temperature, hydrogen gas has stable properties and is not easily prone to chemical reactions with other substances. But when the conditions change (such as ignition, heating, use of catalysts, etc.), the situation is different. If hydrogen gas is adsorbed by metals such as palladium or platinum, it exhibits strong activity (especially when adsorbed by palladium). Palladium metal has the strongest adsorption effect on hydrogen gas. When the volume fraction in the air is 4% -75%, encountering a fire source can cause an explosion.
Product application
Hydrogen is the main industrial raw material, as well as the most important industrial gas and specialty gas
1. It has a wide range of applications in petrochemical, electronic, metallurgical, food processing, float glass, fine organic synthesis, aerospace, and other fields.
2. Hydrogen is also an ideal secondary energy source (secondary energy refers to energy that must be produced from a primary energy source such as solar energy, coal, etc.).
3. In the high-temperature processing of glass manufacturing and electronic microchip manufacturing, hydrogen is added to a nitrogen protective atmosphere to remove residual oxygen.
In the petrochemical industry, hydrogenation is required to extract crude oil through desulfurization and hydrogenation cracking.
Another important use of hydrogen is the hydrogenation of fats in margarine, edible oils, shampoo, lubricants, household cleaners, and other products.
Due to the high fuel efficiency of hydrogen, the aerospace industry uses liquid hydrogen as fuel.
High purity hydrogen gas is also used in nuclear research, bombardment particles for deuterium accelerators, tracers, raw materials for gas chromatography hydrogen flame analysis, low density sounding balloons, new high-energy fuels (driving rockets), smelting of metals such as tungsten and molybdenum, as well as in industries such as petroleum refining, float glass, electronics, food, drinking water, chemical production, aerospace, and automotive
