Ag Exchanged Zeolites Silver Exchanged Zeolite Ag 400 For Cryogenic Vacuum Equipment To Remove Hydrogen

A hydrogen getter is a material that absorbs hydrogen gas to maintain a vacuum or a controlled atmosphere in a sealed system. These getters are crucial in applications like cryogenic storage,  transport, where the presence of hydrogen can cause corrosion or device failure. They work by chemically reacting with and trapping hydrogen, often using a porous matrix impregnated with active materials like siliver zeolite.

How Ag Exchanged Zeolites  work

Absorption: Hydrogen getters actively absorb hydrogen gas, removing it from the surrounding environment.

Silver Exchanged Zeolite Applications

Cryogenics: Incorporated into containers and pipes for liquid gases like LNG and LH2 to maintain a high vacuum and prevent degradation.

Common types

Ag 400 Zeolite Molecular sieves: Materials like silver molecular sieves are used in high-vacuum applications to absorb hydrogen released from materials like steel.

Ag-Zeolite Hydrogen Getter

Silver molecular sieve is a new generation of high-efficiency hydrogen absorbing material used in the vacuum interlayer of high-vacuum multi-layer insulation containers. It can effectively adsorb the slowly released H2 of carbon steel, stainless steel, insulation materials, etc., so as to ensure that the interlayer always keeps a super High vacuum. Our silver molecular sieve adopts brand new small-crystal molecular sieve synthesis technology, fully crystalline molecular sieve carrier molding technology, and active silver ion loading and activation technology so that it has excellent mechanical strength, hydrogen absorption rate, and hydrogen absorption capacity at the same time.

Usage

Due to the different production processes and operations of each manufacturer, it is generally recommended that the dosage of our silver zeolite be 10-15 times that of palladium oxide, and there is no need to activate it before use;

Storage

In order to avoid damage to the glass bottle during transportation and storage, add foam packaging.

Why We focus on Hydrogen getter with a cryogenic tank vacuum space

To maintain good thermal insulation performance, the vacuum degree of the dissection is generally below 10-²Pa Pa. The leakage and outgassing in the high-vacuum dissection insulation tank are the main factors that destroy its vacuum degree.

Leakage： leakage of the inner and outer tank. The main components are N2、O2 、CO2 and H2O, which account for 20% to 30% of the leaked gas and can be easily absorbed by activated carbon or traditional zeolites at 77 K or above.

Outgassing： outgassing of carbon steel, stainless steel, aluminum foil, and cellophane, producing mainly H2, H2 accounts for 70%~80% of the leakage and outgassing and it is difficult to be absorbed, making it a key factor for the destroy of vacuum degree.

The main characteristics of the silver zeolite series are as follows:

The high-vacuum multi-layer insulation tank is mainly composed of the outer shell (carbon steel), inner tank (stainless steel), reflective material (aluminum foil), and insulation material (cellophane).

a) the adsorption capacity of PdO for H2 is about 8 times that of silver zeolite. In practical use, taking into account the influence of other factors, in order to ensure the same hydrogen adsorption performance, the recommended amount of silver zeolite is 10-15 times that of PdO;

b) the adsorption capacity of silver zeolite is higher than that of imported and domestic products;

c)Application of hydrogen getter in high-vacuum multi-layer insulation tank plays a key role in maintaining the vacuum degree for a long period.  The maintenance of vacuum degree mainly depends on the characteristics and amount of the hydrogen getter, and whether it can work well.