Rare gases are helium, neon, argon, krypton, xenon, radon and other gases, in the past, it was believed that these gases do not react with other substances, so they are also referred to as “noble gases”.
Names and chemical formulas: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn).
Properties of rare gases: Are colorless, odorless gases, very inactive in nature, and aren’t easy to chemical reactions with other substances, once called noble gases.
First of all, the lamp is divided into two properties, a heat radiation, a gas discharge lamp, the former is the filament in the heat to produce dazzling light, generally used is an inert gas, used to protect the filament with, should belong to its physical properties, the latter is to rely on the discharge between the gas luminescence, some filled with inert gas (such as argon), energy-saving lamps example, he is used to protect the filament, to avoid the filament of the electronic powder and mercury gas consumption Too fast, there are physical properties and chemical properties.
Rare gases used in electric light source, is the use of its physical properties, rare gases used in electric light source is the use of electricity when they will emit a different color of colored light, the process of this change no new substances generated for the physical change, the process of the performance of the nature of the physical properties.
At room temperature and pressure, they are colorless and odorless monoatomic gases, it is difficult to carry out chemical reactions. In the atoms of the noble gas elements, the electrons are arranged in the various electron layers just to reach a stable number. Therefore, atoms do not easily lose or gain electrons, and it is difficult to have chemical reactions with other substances.
Extended information: In the larger atomic weight, the number of electrons in the noble gas atoms, the outermost electrons are farther away from the nucleus and are bound relatively weakly. If other atoms with strong electron attraction are encountered, these outermost electrons are lost and a chemical reaction occurs. Neon, argon, krypton and xenon can be obtained from air by gas liquefaction and fractionation.
Colors of rare gases when electrified
Neon gas glows red when energized.
Argon gas electrically emits a blue-violet color.
Krypton gas is energized to emit light in a yellowish-green color.
Xenon electroluminescence is the same color as sunlight.
Radon is a radioactive gas and is not used as a light source.
The noble gases, also called rare gases, include six gases: helium, neon, argon, krypton, xenon and radon. Their volume in the air is 0.94% for argon, 0.0018% for neon, 0.0005% for helium, 0.00011% for krypton, 0.000009% for xenon, and radon is a radioactive gas.
They are called rare gases because their content in the air is very minute. In general, rare gases are chemically inactive and do not react easily with other substances, and are also known as noble gases.
Depending on the nature of the rare gases, they are used in production and scientific research. Helium is incombustible and light enough to replace flammable hydrogen in high-altitude balloons and airships. Because of their chemical inactivity, rare gases are often used as protective gases in industrial production.
For example, with arc welding rockets, aircraft, missiles, ships and other stainless steel, aluminum alloy materials used, you can use high-purity argon gas as a protective gas to prevent high-temperature metal and oxygen in the air and other reactions. Commonly used incandescent light bulbs are filled with a mixture of argon and nitrogen as a protective gas to protect the filament, in order to extend the life of the bulb.
Rare gases in the low-pressure discharge will emit a variety of colors of light, such as neon will emit a red glow, argon will emit a violet-blue glow, helium will emit a pink glow, so you can use rare gases made of colorful neon lights, the modern city of the night dressed up in full bloom. Neon lamps emit red light, can be transmitted through the fog, commonly used as aviation, navigation and railroad traffic lights.
Rare gases in the field of high-tech is showing their skills, helium boiling point is the lowest of all known substances, liquid helium is often used as ultra-low-temperature research in the refrigerant, helium in the atomic reactor can also be used as a refrigerant. Neon, krypton and xenon are also used to make lasers.
Most rare gases (except helium and radon) are extracted from the air. Although the content of rare gases in the air is low, the total amount is large, so they can be economically extracted through cryogenic separation. Fullcryo provides professional air separation equipment to extract rare gases, mainly relying on “cryogenic distillation” technology.
Taking Fullcryo’s xenon-krypton refining equipment as an example, the production process is as follows: First, the air will be purified to remove impurities such as dust, water vapor and carbon dioxide. Then, the clean air is compressed and rapidly cooled, gradually cooled to extremely low temperatures, liquefied, and turned into “liquid air”. Different gases have different boiling points, so in the subsequent distillation tower, by controlling the temperature change, the main components such as nitrogen, oxygen, and argon can be separated in an orderly manner. Rare gases such as neon, krypton, and xenon have extremely low content and are usually present in tail gas, and need to be further extracted by methods such as deep cold purification or adsorption. The entire extraction process is like “screening” molecules with temperature, which relies on thermodynamic principles and requires precise equipment and control systems.
Fullcryo provides high-purity (5N-6N level) rare gas supply and the most professional industrial rare gas solutions. It has currently helped companies in East Asia, Europe and the United States obtain more industrial gases through on-site plant construction, pipeline transmission and other gas delivery methods.
