Hydrogen has a very broad flammability range—a 4 percent to 74 percent concentration in air and 4 percent to 94 percent in oxygen; therefore, keeping air or oxygen from mixing with hydrogen inside confined spaces is very important.

H2
It is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. It has an atomic mass of 1.00794. Hydrogen is the most abundant element in the universe and it has an atomic number of 1 . Hydrogen has a molar mass of 1 and it’s molecular formula is H2.

Hydrogen separation uses membranes to separate the hydrogen from other gases, leaving it in its purest and most valuable form. The separated hydrogen that is captured can be used for many different applications including: LIFTING: As a lifting agent similar to helium.

Hydrogen turns into a liquid when it is cooled to a temperature below -252,87 °C.

Hydrogen used in the fuel cells is a very flammable gas and can cause fires and explosions if it is not handled properly. Hydrogen is a colorless, odorless, and tasteless gas.

Autoignition point of selected substances

Multiply the volume and pressure and divide the product by the temperature and the molar gas constant to calculate moles of the hydrogen gas. In the example, the amount of hydrogen is 202,650 x 0.025 / 293.15 x 8.314472 = 2.078 moles.

Molecular hydrogen gas, or H2, is the primary form in which hydrogen is found. Because there are two hydrogen atoms, we call this diatomic hydrogen, di meaning two. Because the hydrogen atoms are covalently bonded together they form a molecule; so H2 is also referred to as molecular hydrogen.

Polyimide membranes are well-known commercialized membranes for separating hydrogen gas at operating temperatures less than 200 °C [1,2]. In polymer membranes used to separate gases, the gas molecules are transported through the spaces of the polymer chain network.

Electrolysis is the process of using an electrical current to separate water into hydrogen and oxygen gas. The electrical charge that is applied to water will break the chemical bond between the hydrogen and oxygen atoms and produce charged particles called ions.

10.16

The molecular formula of hydrogen is H 2. Hydrogen has been recognized as a convenient, clean burning fuel. It can be stored as a compressed gas or as a liquid and is suitable for internal combustion engines in automobiles. Hydrogen itself is non-toxic and not carcinogenic.The hydrogen can be produced from coal and water.

Physical Properties of Hydrogen Gas – H 2. Odour. Odourless. Appearance. Colourless gas. Complexity. less than 7. Vapour Pressure. 20 ºK and 32 ºK.

Dihydrogen consists of two hydrogen atoms joined by a single bond. It acts as an antioxidant, a human metabolite, an electron donor, and a fuel. The structure is given below. This compound can easily ignite. On ignition, it burns as a pale blue and invisible flame.

Hydrogen gas can also be produced on a laboratory scale by the electrolysis of an aqueous solution. Production of hydrogen through electrolysis is also used industrially. Hydrogen atoms can be produced in significant quantities in the gas phase by the action of radiation on or by extreme heating of H2 (3000 K).