Hydrogen is one of the least dense gases known to exist, only slightly denser than air.1/14, i.e.0 At 0°C and under standard atmospheric pressure, the density of hydrogen is0.0899 g/LHydrogen can be used as a filling gas for airships and balloons (due to its flammability, it is not very safe, and airships now mostly use helium for filling). Hydrogen is mainly used as a reducing agent.
Hydrogen is used for diseases.
Basic Introduction Edit
Introduction
Chinese Name:Hydrogen
Alias:Pure hydrogen;Liquid Hydrogen;High-purity hydrogen;Compressed Hydrogen
English Name:Hydrogen
English Alias:-Compressed hydrogen; molecular hydrogen
CAS:133-74-0
EINECS:215-605-7
Chemical Formula:H2
Relative Molecular Mass:2.0157
Hydrogen production is achieved by passing electricity through water to generate hydrogen and oxygen.
Safety Protection
Deuterium is non-toxic and asphyxiating.
Hydrogen is highly flammable and explosive; if there is a loud bang during combustion, it indicates impure hydrogen; an explosion may occur.
So, it is essential to give this due attention. See hydrogen for more information.
Flammability
Henan hydrogen is a flammable gas, accounting for a volume fraction in the air of4%Please provide the Chinese content you would like translated into American English.75%Hydrogen burns at all times. The enthalpy change of hydrogen combustion is -286 kJ/molManufacturer's Production:
2 H2(g) + O2(g) → 2 H2O(l); ΔH = -572 kJ/mol
Zhengzhou hydrogen supply4%Please provide the Chinese content you would like translated into American English.74%Mixed with air or occupies5%To95%A gas explosive when mixed with chlorine at certain concentrations, it is easily ignited by heat, sunlight, or sparks. The ignition point of hydrogen is500 °CPure hydrogen and oxygen mixture emits ultraviolet light when burned.
Because hydrogen is lighter than air, its flame tends to rise quickly, thus causing less harm than the combustion of hydrocarbons. Hydrogen reacts with all elemental oxides. At room temperature, hydrogen can spontaneously react with chlorine (under light exposure). Hydrogen and fluorine gases can explode when mixed in the dark and cold, producing potentially hazardous hydrochloric or hydrofluoric acids.
Emergency response to hydrogen fire
Evacuate personnel from the leaked pollution area to the upwind location immediately, and isolate them strictly, with strict control over entry and exit. Cut off the fire source. It is recommended that emergency personnel wear self-contained positive-pressure breathing apparatus and fire-resistant protective clothing. Try to cut off the source of the leak. Ventilate properly to accelerate dispersion. If possible, use exhaust fans to direct the leaked gas to an open area or burn it with appropriate nozzles. Properly dispose of the leaking container, and use it only after repair and inspection. Firefighting method: cut off the gas source. If the gas source cannot be immediately cut off, do not extinguish the burning gas. Cool the container with water spray, and, if possible, move the container away from the fire to an open area. Fire extinguishing agents: fog, foam, carbon dioxide, dry powder.
Industrial Use
1.Hydrogen is a primary industrial raw material and a significant industrial gas and specialty gas in Zhengzhou, Henan. It has extensive applications in petrochemicals, electronics, metallurgy, food processing, float glass, fine organic synthesis, aerospace, and more. Additionally, hydrogen is an ideal secondary energy source (secondary energy refers to energy that must be produced from a primary energy source like solar or coal). Generally, hydrogen combines with oxygen. This characteristic makes it a natural reducing agent used to prevent oxidation in production. In the high-temperature processing of glass manufacturing and the production of electronic microchips, hydrogen is added to nitrogen inert gas to remove residual oxygen. In the petrochemical industry, hydrogenation is required to refine crude oil through desulfurization and hydrogenation cracking. Another important use of hydrogen is in the hydrogenation of fats in products like margarine, cooking oils, shampoos, lubricants, household cleaners, and others. Due to its high fuel properties, the aerospace industry uses liquid hydrogen as fuel.
2.Raw materials for synthetic ammonia, synthetic methanol, synthetic hydrochloric acid, metallurgical reducing agents, and hydrogen desulfurization agents in oil refining.
Cautionary Notes
Hydrogen is a colorless, odorless, non-toxic, flammable, and explosive gas. It poses an explosive risk when mixed with fluorine, chlorine, oxygen, carbon monoxide, and air. Among these, a mixture of hydrogen and fluorine can spontaneously explode in low temperatures and darkness. The mixture with chlorine has a volume ratio of...1：1Hydrogen can explode even under light conditions. Due to its colorless and odorless nature, its presence is often undetectable as it burns with a transparent flame. To make its presence detectable by smell, a foul-smelling compound called ethanethiol is often added to hydrogen. Additionally, this compound can also impart a color to the flame.
Hydrogen is non-toxic and inert physiologically, but an increase in its concentration in the air can lead to asphyxiation. Like all cryogenic liquids, direct contact with liquid hydrogen can cause frostbite. The spillage of liquid hydrogen and its sudden, widespread evaporation can also cause environmental asphyxia and potentially form explosive mixtures with air, leading to combustion and explosion incidents. Mixing with air can form explosive mixtures that explode upon contact with heat or an open flame. Being lighter than air, if leaked indoors, it rises and remains trapped at the ceiling, making it difficult to disperse and can cause an explosion upon contact with a spark. Hydrogen reacts violently with halogens such as fluorine, chlorine, and bromine.
Hydrogen, being a flammable compressed gas, should be stored in a cool, well-ventilated storage room. The room temperature should not exceed30Keep away from ignition sources and heat. Protect from direct sunlight. Separate storage from oxygen, compressed air, halogens (fluorine, chlorine, bromine), and oxidizers. Absolutely avoid mixing storage and transportation. Install explosion-proof lighting and ventilation in the storage room, with switches located outside the warehouse. Equip with the appropriate types and quantities of firefighting equipment. Prohibit the use of machinery and tools that may produce sparks. During inspection, pay attention to the product name and the bottle inspection date; use the first-in, first-out principle. Handle with care to prevent damage to the cylinders and accessories.
Product Brand:Nian Long
Packaging:Steel Cylinder
Specs:40L
Material:Genuine
