Air Separation and Pressure-Swing Adsorption (PSA) Gas Separation
Application Background
Air separation (oxygen and nitrogen production) and industrial gas purification are among the most important application areas for granular molecular sieve products. By exploiting the differences in adsorption rate and capacity of different gas molecules within the sieve pores, gas separation and purification are achieved through pressure-swing adsorption (PSA / VPSA) or temperature-swing adsorption (TSA) processes.
Core Application Scenarios
Industrial Oxygen Production by PSA
|
Item |
Description |
|
Principle |
Exploits the much higher N₂ adsorption capacity (vs. O₂) of the sieve — N₂ is adsorbed at high pressure and released on depressurization, yielding oxygen-enriched gas |
|
Molecular Sieve Grade |
JZ-512O |
|
Specification Requirements |
Beads, φ1.6-2.5 mm, high crushing strength (must resist attrition under frequent pressure switching) |
|
Unit Type |
Dual-bed / multi-bed PSA / VPSA units |
Industrial Nitrogen Production by PSA
|
Item |
Description |
|
Principle |
Exploits the much faster O₂ diffusion rate (vs. N₂) through 5A or carbon molecular sieves — O₂ is adsorbed at high pressure, yielding nitrogen-enriched gas |
|
Molecular Sieve Grade |
JZ-CMS |
|
Specification Requirements |
Beads, φ1.6-2.5 mm, low abrasion (≤ 0.2%), high strength |
|
Applications |
Electronics manufacturing, food preservation, inert chemical protection, tertiary oil recovery |
Industrial Hydrogen Purification
|
Item |
Description |
|
Principle |
JZ-512H molecular sieve selectively adsorbs impurity gases (CO, CO₂, CH₄, N₂, etc.) from H₂, producing high-purity hydrogen |
|
Feed Gas |
Shift gas / reformed hydrogen, methanol cracked gas, ammonia-plant tail gas, coke-oven gas / water gas, refinery low-pressure separator gas from hydroprocessing, catalytic dry gas |
|
Purity |
Up to 99.999% and above |
Pre-Purification in Air Separation Units
|
Item |
Description |
|
Principle |
13X molecular sieve simultaneously removes H₂O and CO₂ from air, preventing freeze-plugging of the cryogenic cold box in air separation units |
|
Molecular Sieve Grade |
JZ-3ZSAG |
|
Specification Requirements |
Beads, φ1.6-2.5 mm, high strength, low dust |
|
Importance |
The "throat" of the air separation unit — inadequate purification will cause cold-box freeze-plugging and unscheduled shutdowns, with substantial losses |
Related products:
- JZ-512O
- JZ-512H
- JZ-CMS