Carbon Molecular Sieve (CMS) is a non-polar adsorbent specifically engineered for the separation of nitrogen from air under ambient temperature and pressure swing conditions. HK-CMS-260 is a premium-grade carbon molecular sieve manufactured from high-purity elemental carbon, appearing as black cylindrical pellets with a uniform particle size distribution. The material contains a substantial number of micropores with diameters of approximately 4 angstroms (4Å), which exhibit strong instantaneous affinity for oxygen molecules. This unique pore structure enables CMS to preferentially adsorb oxygen from compressed air, producing a continuous stream of high-purity nitrogen for a wide range of industrial applications.
HK-CMS-260 is the preferred adsorbent for Pressure Swing Adsorption (PSA) nitrogen generation systems, delivering higher nitrogen production rates than standard grades. At 99.5% nitrogen purity, HK-CMS-260 achieves a nitrogen production rate of 260 Nm³ per metric ton of CMS per hour, making it an ideal choice for industries requiring nitrogen purities ranging from 97% to 99.995%.
CMS separates air based on the principle of kinetic selectivity. At equilibrium, the adsorption capacity of CMS for oxygen and nitrogen is relatively similar. However, oxygen molecules diffuse through the narrow micropores much faster than nitrogen molecules. During the short adsorption cycle of a PSA process, oxygen is preferentially adsorbed while nitrogen remains in the gas phase and is collected as the product gas.
The PSA process operates using a continuous two-bed cycle.
Compressed and purified air passes through the CMS adsorbent bed. Oxygen molecules are selectively adsorbed, while nitrogen exits the system as high-purity product gas.
Once the adsorbent approaches oxygen saturation, system pressure is reduced. The adsorbed oxygen is released, regenerating the CMS for the next adsorption cycle.
By alternating between two adsorption beds—one adsorbing while the other regenerates—the PSA system continuously supplies nitrogen without external heating, resulting in excellent energy efficiency.
CMS-260 can also be regenerated through pressure swing regeneration or thermal regeneration by heating to 300–400°C with dry inert gas. The material demonstrates excellent thermal stability and maintains reliable separation performance at temperatures up to 300°C.
Parameter | Specification | Reference |
Appearance | Black cylindrical pellets | Visual |
Pellet Diameter | 0.9 – 1.3 mm (customizable) | — |
Bulk Density | 640 – 690 g/L | — |
Compressive Strength | ≥70 – 100 N/pellet | — |
Loss on Drying | ≤1.0 wt% | — |
Hardness | ≥98 wt% | — |
Dust Content | ≤100 ppm | — |
Adsorption Cycle Time | 2 × 60 seconds | — |
Micropore Diameter | 4 Å | — |
Service Life | 6 – 10 years (ideal conditions) | — |
Performance Data
HK-CMS-260 PSA Performance at 0.7–0.8 MPa Adsorption Pressure
Nitrogen Purity (%) | Nitrogen Production (Nm³/h·t) | Nitrogen/Air Recovery Rate (%) |
99.99 | 105 – 130 | ≥21 |
99.9 | 170 – 200 | ≥31 |
99.5 | 220 – 265 | ≥40 – 41 |
99.0 | 250 – 325 | ≥45 |
98.0 | 290 – 390 | ≥46 |
97.0 | 330 – 405 | ≥48 |
Note: Performance may vary with operating conditions. HK-CMS-260 achieves 260
High Nitrogen Production Efficiency
HK-CMS-260 delivers outstanding nitrogen production across a wide purity range. At 99.5% purity, it produces 220–265 Nm³/h·t, while at 99.99% purity, production remains 105–130 Nm³/h·t. Nitrogen recovery reaches 40–41% at 99.5% purity, maximizing compressed air utilization.
High Purity with Low Impurities
When combined with optional purification equipment, HK-CMS-260 systems can achieve oxygen concentrations below 5 ppm and pressure dew points below −60°C. Nitrogen purity and flow rate can be customized to meet individual process requirements.
Superior Mechanical Strength
With compressive strength of 70–100 N per pellet and hardness of ≥98 wt%, CMS-260 withstands repeated PSA pressure cycles with minimal attrition. Dust content remains below 100 ppm, reducing contamination and extending adsorbent life.
Long Service Life
HK-CMS-260 typically provides 6–10 years of service under normal operating conditions, maintaining stable adsorption performance through thousands of adsorption-desorption cycles.
Stable and Consistent Performance
Strict manufacturing controls ensure uniform particle size, density, and adsorption characteristics. Every production batch undergoes 100% quality inspection to guarantee consistent product performance.
On-Site Nitrogen Generation
HK-CMS-260 eliminates dependence on gas cylinders and liquid nitrogen deliveries. Compared with cryogenic air separation, PSA nitrogen generation offers lower energy consumption, reduced capital investment, and greater operational flexibility.
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HK-CMS-260 carbon molecular sieve is widely used in PSA nitrogen generation systems across numerous industries.
Industry | Typical Applications |
Petrochemical & Oil & Gas | Tank blanketing, pipeline purging, pressure maintenance, enhanced oil recovery, inerting |
Metal Heat Treatment | Controlled atmosphere annealing, carburizing, sintering, brazing, bright heat treatment |
Electronics & Semiconductor | Inert atmosphere for electronic component manufacturing, soldering, wave soldering, semiconductor processing |
Food & Beverage | Modified atmosphere packaging (MAP), food preservation, beverage bottling, inert gas blanketing |
Pharmaceutical | Inert gas protection during synthesis, packaging, storage, and production |
Coal Industry | Fire prevention, mine inerting, goaf inertization |
Cable & Wire Manufacturing | Nitrogen curing for cross-linked polyethylene (XLPE) cable production |
Packaging Options
Packaging Type | Specification |
Plastic Drum | 20 kg net weight |
Plastic Drum | 40 kg net weight |
Plastic Drum | 137 kg net weight |
Custom Packaging | Available upon request |
Storage Information
Item | Specification |
Shelf Life | More than 3 years in original unopened packaging |
Storage Conditions | Store in sealed containers in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and ignition sources. Do not open packaging until ready for use to prevent premature adsorption of moisture and contaminants. |
HENTEKCAT provides comprehensive technical support, including:
HENTEKCAT – Adsorption Technologies, Engineered for Performance.
