Guidelines and specific application sites of molecular sieves

There are many types of molecular sieves in the market, so which one should be chosen to better suit customers' applications?

 

Step 1: Clarify the characteristics of the separated substances

Molecule Substance	Recommendation	Reason	Project
H2O	3A molecular sieve	Pore diameter 0.3nm which just adsorb water	Ethanol dehydration, lithium battery electrolyte drying
CO2	13X molecular sieve	Strong polarity adsorption, CO2 capture rate>90%	Biogas purification, CO2 recovery from breweries
Butane	5A molecular sieve	Pore size 0.5nm, sieving isomeric alkanes	Separation of Normal/Isomeric Alkanes in Petroleum Refining
O2	LiLSX molecular sieve	Selective adsorption of nitrogen and oxygen	Medical oxygen generator (93% purity oxygen)

 

Step 2: Check the operating environment and select the "pressure resistant" molecular sieve

working conditions	Preferred molecular sieve	Advantage
High temperature>150 ℃	High silicon Y-shaped	Thermal decomposition temperature>800 ℃
Acidic environment pH<5	ZSM-5	Acid resistant and corrosion-resistant, with a threefold increase in lifespan
Oil and fog scenes	Pre filter+4A molecular sieve	Prevent oil poisoning, regeneration times>3000 times

 

 

Step 3: The followings are several common used application scenarios

1. New energy battery moisture-proof guard

* Common problem: Decomposition of electrolyte upon contact with water

* Solution: The filtration tank with 3A molecular sieve

* Effect: Moisture content below 10ppm

 

2. Core materials for hospital oxygen concentrators

* Common problem: Traditional oxygen production purity <90%

* Solution: The adsorption tower with LiLSX molecular sieve

* Effect: 93% medical oxygen, in line with ventilator standards

 

3. Dehydration of natural gas pipelines

* Common problem: Moisture condensation corrodes pipelines

* Solution: The drying tower with 4A molecular sieve

* Effect: Dew point -70 ℃, pipeline life extended by 5 years

 

 

4. Purification of alcohol fuel

* Common problem: Ethanol contains water and is difficult to burn

* Solution: The fixed bed with molecular sieve 3A

* Effect: Fuel grade ethanol (moisture<0.3%)

 

5. Refrigerator refrigerant protection

* Common problem: R134a refrigerant hydrolysis and acid corrosion

* Solution: Built in 5A molecular sieve desiccant

* Effect: Cooling efficiency increased by 15%, compressor lifespan extended by 3 years