Molecular Sieve
- Strong adsorption capacity and molecular screening ability.
- Broad uses in catalysis, adsorption, drying, gas separation, and purification.
- There are a variety of sizes for you to choose from.
Molecular Sieve Classification and Definition
Overview of Molecular Sieve Classification
There are many types of molecular sieves. According to the raw materials, there are zeolite molecular sieve and carbon molecular sieve. Zeolite molecular sieves include type A, type X and type Y. According to the shape, there are molecular sieve pellets and molecular sieve beads.
Molecular Sieve Definition
A molecular sieve is a synthetic hydrated aluminosilicate (zeolite) or natural zeolite that functions as a screening molecular. It has many channels with uniform pore sizes and neatly arranged holes in the molecular sieve structure.
The raw materials of molecular sieves zeolite include zeolite powder, silicon aluminum, and aluminum oxide. It is widely used in catalysis, adsorption, drying, gas separation and purification.
Carbon molecular sieve is a special classification of molecular sieve, composed of carbon elements, and is commonly used for gas separation, especially in nitrogen and oxygen generation. Since the pore size and carbon molecular sieve adsorption capacity are different from those of molecular sieves, their functions are also different. If you want to know more about carbon molecular sieves, you can read the article Carbon Molecular Sieve (CMS)-Heycarb Supplier.
Molecular sieve desiccant is synthetic and has tiny pores that block large molecules. Molecular sieves for water removal can be used to remove moisture from liquids and gases. It absorbs water faster than silica gel.
People also ask what the difference is between molecular sieve and silica gel.
Silica gel removes moisture by physical adsorption and can adsorb smaller and more extensive water molecules, so it performs well at lower humidity. Due to uniform pore size structure of molecular sieve size, it can adsorb moisture more precisely, especially for smaller water molecules. Compared with silica gel, molecular sieve for water removal is more efficient at high temperatures or dry conditions.
Heycarb molecular sieve supplier has long-standing manufacturing expertise. Heycarbons molecular sieves are sold in various forms: molecular sieve beads or pellets of multiple sizes. We also offer a wide range of molecular sieve desiccant packaging, from small bags to large bags as well as steel and plastic drums. Contact Heycarbons to get more information.
Different Heycarb Molecular Sieve Types
Molecular sieves are currently primarily of type A, type X, and type Y. Each type of molecular sieve has different pore sizes, properties and functions according to its cation. Molecular sieve uses are also different. Details of various types of molecular sieves are as follows:
Molecular Sieve 3A
3A molecular sieves 0.3nm, are suitable for dryness of gases and liquids, and dehydration of hydrocarbons. It comes in two shapes, including molecular sieve beads and pellets. It can be widely used in deep drying of petroleum, cracked gas, ethylene, propylene and natural gas, and double-glazing glass desiccant.
Main Application Areas
1. Drying of various liquids (such as ethanol)
2. Drying of air and refrigerants
3. Drying of natural gas and methane gas
4. Drying of unsaturated hydrocarbons and cracking gas, ethylene, acetylene, propylene, butadiene
Product Specifications
| Index | Unit | d（1.6-2.5）mm | d（3.0-5.0）mm | ||
|---|---|---|---|---|---|
| Superior product | Qualified product | Superior product | Qualified product | ||
| Attrition loss | % | ≤0.2 | ≤0.4 | ≤0.2 | ≤0.4 |
| Bulk Density | ml | ≥0.65 | ≥0.65 | ≥0.65 | ≥0.65 |
| Static adsorption capacity | % | ≥21 | ≥19.5 | ≥21 | ≥19.5 |
| Qualified rate | % | ≥98 | ≥96 | ≥98 | ≥96 |
| Crushing strength | N/particle | ≥35 | ≥30 | ≥100 | ≥80 |
| Static ethylene adsorption | mg/g | ≤3 | ≤3 | ≤3 | ≤3 |
| Package Moisture | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
Molecular Sieve 4A
4A molecular sieves, with a pore size of about 4A, adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, and propylene. It does not adsorb any molecules with a diameter greater than 4A (including propane). It is widely used in deep drying of gases and liquids such as air, natural gas, alkanes, and refrigerants.
Main Application Areas
1. Petrochemical industry – catalysts, desiccants, adsorbents
2. Automobiles – removal of trace water in automobile braking systems
3. Deep drying of gases and liquids such as air, natural gas, hydrocarbons, refrigerants, etc.
4. Preparation and purification of argon
Product Specifications
| Index | Unit | d（1.6-2.5）mm | d（3.0-5.0）mm | ||||
|---|---|---|---|---|---|---|---|
| Superior product | First-class product | Qualified product | Superior product | First-class product | Qualified product | ||
| Static adsorption capacity | % | ≥22.0 | ≥21.0 | ≥20.0 | ≥22.0 | ≥21.0 | ≥20.0 |
| Attrition loss | % | 0.20 | ≤0.40 | ≤0.60 | ≤0.30 | ≤0.40 | ≤0.60 |
| Qualified rate | % | ≥98 | ≥95 | ≥90 | ≥98 | ≥95 | ≥90 |
| Bulk Density | ml | ≥0.68 | ≥0.68 | ≥0.65 | ≥0.68 | ≥0.68 | ≥0.65 |
| Static methanol adsorption | % | ≥15 | ≥15 | ≥14 | ≥15 | ≥15 | ≥14 |
| Crushing strength | N/particle | ≥35 | ≥35 | ≥30 | ≥80 | ≥80 | ≥60 |
| Package Moisture | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
Molecular Sieve 5A
5A molecular sieve, with a pore size of about 5A, can adsorb any molecule smaller than this pore size. In addition to the functions of 3A and 4A molecular sieves, it can also adsorb C3-C4 normal alkanes, ethyl chloride, ethyl bromide, butanol, etc. It can be used for regular and isomerized hydrocarbon separation, pressure swing adsorption separation, and co-adsorption of water and carbon dioxide.
Main Application Areas
1. Natural gas drying, desulfurization, and carbon dioxide removal
2. Nitrogen-oxygen separation, nitrogen-hydrogen separation, production of oxygen, nitrogen, and hydrogen, PAS-pressure swing adsorption
3. Petroleum dewaxing, separation of normal hydrocarbons from branched hydrocarbons and cyclic hydrocarbons
Product Specifications
| Index | Unit | Specification | |||
|---|---|---|---|---|---|
| pellet | sphere | ||||
| Particle size | mm | 1.5-1.7 | 3.0-3.3 | 2.0-3.0 | 3.0-5.0 |
| Qualified rate | % | ≥98 | ≥98 | ≥96 | ≥96 |
| Bulk Density | g/ml | ≥0.64 | ≥0.64 | ≥0.66 | ≥0.66 |
| Attrition loss | % | ≤0.20 | ≤0.40 | ≤0.20 | ≤0.20 |
| Crushing strength | N/particle | ≥30 | ≥45 | ≥30 | ≥60 |
| Static adsorption capacity | % | ≥21.5 | ≥21.5 | ≥21.5 | ≥21.5 |
| N-hexane adsorption | % | ≥14 | ≥14 | ≥14 | ≥14 |
| Package Moisture | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
13X-Type Molecular Sieve(double-glazing glass desiccant)
Molecular Sieve 13X particle size is 10A, can adsorb any molecular less than this size. 13x mol sieve can be used as catalyst carrier, co-adsorption of H2O and CO2, co-adsorption of H2O and H2S, mainly used in medicine and compressed air drying system, according to different applications have different type.
Main Application Areas
1. Gas purification in gas separation plant, removal of water and carbon dioxide
2. Natural gas, liquefied petroleum gas, liquid hydrocarbons dry and desulfurization
3. General gas depth drying
Product Specifications
| Index | Unit | Specification | |||
|---|---|---|---|---|---|
| pellet | sphere | ||||
| Particle size | mm | 1.5-1.7 | 3.0-3.3 | 1.0-1.6 | 3.0-5.0 |
| Qualified rate | % | ≥98 | ≥98 | ≥96 | ≥96 |
| Bulk Density | g/ml | ≥0.61 | ≥0.61 | ≥0.64 | ≥0.64 |
| Attrition loss | % | ≤0.10 | ≤0.20 | ≤0.10 | ≤0.10 |
| Crushing strength | N/particle | ≥30 | ≥45 | ≥25 | ≥65 |
| Static adsorption capacity | % | ≥23.5 | ≥23.5 | ≥23.5 | ≥23.5 |
| Package Moisture | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
13X-Type Air Separation Molecular Sieve
13X-Type Air Separation Molecular Sieve is a special product designed to meet the special requirements of the cryogenic air separation industry. It further improves the molecular sieve adsorption capacity for CO2 and H2O and avoids the freezing tower phenomenon that occurs during air separation. It can be used for different-sized cryogenic air separation equipment.
Main Application Areas
Removal of water and carbon dioxide in the air
Product Specifications
| Index | Unit | Specification | |||
|---|---|---|---|---|---|
| pellet | sphere | ||||
| Particle size | mm | 1.5-1.7 | 3.0-3.3 | 2.0-3.0 | 3.0-5.0 |
| Crushing strength | N/particle | ≥30 | ≥70 | ≥50 | ≥70 |
| Bulk Density | g/ml | ≥0.62 | ≥0.61 | ≥0.64 | ≥0.64 |
| Attrition loss | % | ≤0.20 | ≤0.20 | ≤0.10 | ≤0.10 |
| Static adsorption capacity | % | ≥27 | ≥27 | ≥27 | ≥27 |
| Package Moisture | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
How to Use Molecular Sieves?
People also ask how you use molecular sieves. Molecular sieves can selectively adsorb molecules and have various uses, usually in catalysis, drying, gas separation, and purification. The specific method of using molecular sieves depends on the application scenario. Generally, there are several steps: loading molecular sieves, molecular sieve adsorption, and molecular sieve regeneration.
The following uses air drying as an example to introduce how to use molecular sieves.
- Loading molecular sieves: Select the type of molecular sieve suitable for air drying, usually 5A or 13X molecular sieve. Load the molecular sieve into the drying tower or adsorption bed to ensure that the molecular sieve is evenly distributed to form a fixed bed.
- Moisture adsorption: After removing large particles of impurities and oil stains, the air flows into the molecular sieve bed through the air inlet pipe. The pores of the molecular sieve adsorb the water vapor in the air. The dry air is discharged through the air outlet pipe and used by industrial equipment or other systems that require dry air.
- Molecular sieve regeneration: As moisture accumulates, molecular sieve adsorption capacity gradually becomes saturated. In order to achieve molecular sieve regeneration, it is necessary to expel the moisture from the molecular sieve by heating or reducing the pressure.
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