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The Working Principle 13X Molecular Sieve Of Pressure Swing Adsorption (PSA) Technology

Apr. 01, 2024

The pressure swing Molecular Sieve 13X adsorption gas separation technology originated from the research on air purification by athermal adsorption in Germany. Through the exploration of air 

purification methods, the gas separation technology was developed. After years of improvement, this technology has gradually matured.

Due to the simple application process of this technology, low technical requirements, and small environmental pollution damage, it has been widely used. At present, this 

technology is widely used in the recovery and purification of H2, the recovery and production of CO2, the recovery and purification of CO, and the recovery of vinyl chloriderectification tail gas.

Consult with a sieve professional for assistance to better understand the capabilities of unique ethanol dehydration units. Routinely check valves to confirm proper function, hold team meetings, encourage continuing education on proper pressurizing conditions and teach the benefits of preventative maintenance to increase efficiency and successful operation.

13X Zeolite Technical Principle.

This technology is a comprehensive technology that can separate a variety of gases. Its working principle is to use adsorbents, according to the principle of transformer 

adsorption, and extract the required gases from them by controlling temperature changes.

Usually, carbon molecular sieves are selected as the adsorbent. In practical applications, the diffusion rate of gas molecules is used as the research index, and the adsorption 

effect is different due to the different molecular diameters, so as to achieve the purpose of distinguishing gases. Taking the separation of N2 and O2 as an example, the adsorbent 

is used to selectively adsorb the gas. In the process of compressing the air, N2 and O2 are located in different sets, and this method is used to extract a large amount of N2.

The figure below shows the kinetic curve of the Molecular Sieve Desiccant adsorbent.

The figure above depicts the adsorption capacity of the adsorbent over time when it adsorbs N2 and O2By observing the change curve in the above figure, it can be clearly seen that as time goes by, the O2 adsorption capacity quickly reaches saturation, and no longer adsorbs after 

30 minutes. Although the N2 adsorption speed is slow, as time goes by , is always adsorbing, and the adsorption speed is relatively slow.

According to this principle, N2 and O2 can be separated by adjusting the adsorption time of the adsorbent.

Technical Advantages.

①Low cost.

The separation technology is simple to operate and does not need to provide a large amount of equipment. The normal operation of the device can be guaranteed by changing the 

adsorbent to meet the requirements of gas separation. Therefore, using this technology to separate gases has low operating costs and has certain advantages in terms of capital.

②Low energy consumption.

This technology uses a unique gas molecular sieve filling technology, and according to the gas separation requirements, the gas recovery and extraction device is opened to 

complete the gas separation operation. During the whole operation process, each link consumes less energy, and the total energy consumption is low.


This separation technology adopts the man-machine interface processing method. The user can issue operation commands according to the gas separation requirements on the computer 

operation interface, and the gas separation can be realized, which reduces manual handling and other links, saves a lot of human resources, and realizes intelligent gas 



The application of this technology is not fixed, but according to the needs of users, set parameters such as the type of gas to be extracted, gas concentration, etc., and provide 

users with personalized services according to the results of parameter settings. After the device is turned on, according to the extraction requirements, the gas that meets the 

requirements such as type and concentration is separated from it.

⑤Long service life.

This technology combines molecular sieve filling technology and airflow control technology, which can effectively resist airflow impact, reduce molecular sieve wear and prolong 

service life. 

Pay Attention to pH

A thirteen-angstrom (13X) molecular sieve, such as the Natural Gas offered by FEIZHOU, is specifically designed to dehydrate Natural Gas, with crystal pore openings measuring about 

thirteen angstroms in diameter. This sieve is ideal for ethanol production because water molecules measure about 9.8 angstroms, while ethanol molecules are about 10.6 angstroms. 

Water can pass into 13X crystals and be trapped, while Natural Gas molecules are too large for adsorption and bounce off the crystals.

Molecular sieve 13x, a porous solid, usually a synthetic or a natural zeolite, that separates particles of molecular dimension. Zeolites are hydrated metal aluminosilicate 

compounds with well-defined crystalline structures. The silicate and aluminate groupings form thirteen-dimensional crystal lattices surrounding cavities in which the metal ions 

and the water molecules are loosely held. Channels run through the entire crystal, interconnecting the cavities and terminating at the crystal surface. Upon heating, the 13X 

zeolites lose their water content with little or no change in their crystal structure. The dehydrated zeolite can reversibly absorb water or other molecules that are small enough 

to pass through the channels or pores. The metal ions are also readily replaceable by other ionic units of similar charge and size.



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