Industry News

PSA, VPSA Process and Oxygen Zeolite Introduction

Author : Gophin Chemical

Update time : 2022-02-28 16:37:37

VPSA (Vacuum Pressure Swing Adsorption) and PSA (Pressure Swing Adsorption) have similar oxygen production processes. Both processes use molecular sieves to selectively adsorb different gas molecules to separate gases. The difference is that the PSA oxygen generator enriches oxygen through pressure adsorption and atmospheric pressure desorption, while the VPSA oxygen generator desorbs oxygen from the saturated molecular sieve under vacuum conditions.

Although both processes use air as raw material, the principle of oxygen production is similar. But there are still a few differences:

1. The VPSA oxygen generator uses a blower to get raw air and pressurizes it, while the PSA oxygen generator uses an air compressor for air supply.
2. In the selection of the core component - zeolite molecular sieve, the PSA oxygen generator uses sodium molecular sieve (EniSorb 13X-HP), and the VPSA oxygen generator uses lithium molecular sieve (EniSorb Li-X).
3. The adsorption pressure of PSA oxygen generator is 0.55~0.8Mpa, and the adsorption pressure of VPSA oxygen generator is 0.05Mpa.
4. PSA oxygen capacity could reach 200~300Nm/h, and VPSA oxygen capacity could reach 7500~9000Nm/h.
5. Compared with PSA, VPSA has low energy consumption (power consumption per cubic meter of oxygen production is ≤ 0.5 kW), and is more environmentally friendly and green. Although the VPSA oxygen generator has a high oxygen capacity ability, the system design is complex, the equipment volume is also large. The requirements for supporting engineering conditions are stricter, it will take up a large space, and it needs on-site installation and debugging. For small oxygen stations, PSA is relatively better choice.

PSA Pressure Swing Absorption Adsorbent: EniSorb 13X-HP molecular sieve	Working principle: PSA uses air as raw material, and uses molecular sieves to selectively adsorb nitrogen and oxygen to separate nitrogen and oxygen in the air. Under normal temperature and pressure, ENISORB 13X-HP molecular sieve is used to selectively adsorb impurities such as nitrogen, carbon dioxide and water in the air, thereby enriching oxygen with higher purity.
	Equipment composition: Air compressor, air dryer, degreasing machine, adsorption towers, oxygen tank, control system
	Oxygen production parameters: Purity: 93±3% Pressure: 0.55-0.70Mpa Oxygen Capacity: 45-60Nm3/ton.hr
VPSA Vacuum Pressure Absorption Adsorbent: EniSorb Li-X Molecular Sieve, Activated alumina or 13X molecular sieve	Working principle: The nitrogen and oxygen in the air are sucked into the adsorption tower under low pressure. After the adsorption is saturated, the molecular sieve is desorbed under vacuum conditions, the nitrogen is discharged, and the oxygen enters the purification system. Molecular sieves are continuously adsorbed and desorbed to obtain oxygen with high purity (93±3%).
	Equipment composition: Blower, vacuum pump, cooler, adsorption towers, oxygen tank, control system
	Oxygen production parameters: Oxygen purity: 93±3% (can be adjusted within the range of 30-95% according to user requirements) Pressure: -50kpa~50kpa Oxygen production: 90-100Nm3/ton.hr

Next : EniSorb Molecular Sieve Introduction and Application

Related News

Pressure Swing Adsorption Hydrogen Purification Adsorbent Zeolite

Mar .15.2022

Pressure swing adsorption (PSA) processes are used for the production of high purity hydrogen from a variety of hydrogen-rich streams. The process is based on a physical binding of gas molecules to adsorbent material. The respective force acting between t

EniSorb CMSCH4 Coalbed Methane Recovery Adsorbent

Mar .08.2022

By EniSorb CMSCH4 adsorbent, the mixed gas of 30%-70% of CH4 and N2 can be concentrated to more than 92%, the recovery rate is more than 31.6%, and the mixed gas of 50%-50% of CH4 and N2 can be concentrated to more than 95%, The recovery rate is over 47%.

Activated Zeolite Powder Application in Polyurethane Production

Feb .21.2022

ENISORB-3AP activated zeolite powder can effectively selectively adsorb trace moisture in typical polyurethane formulations, inhibit the occurrence of side reactions, reduce the generation of bubbles and prolong the operation time.

EniDry HA Series Hearing Aids Desiccant 3g 30g 40g

Feb .10.2022

COVID-19 Nucleic acid testing kits desiccant
Pharmaceutical desiccant
Hearing aids desiccant

Ms. Jamie Shaw Ms. Jamie Shaw

Ms. Jamie Shaw

Ms. Jamie Shaw Ms. Jamie Shaw Ms. Jamie Shaw