HENTEKCAT’s Desiccant and Adsorbent division provides high-performance materials for gas drying, moisture control, carbon dioxide removal, and volatile organic compound (VOC) adsorption across industrial, medical, and environmental applications. Our portfolio includes activated alumina balls, soda lime, and honeycomb activated carbon – each engineered for maximum adsorption capacity, mechanical durability, and cost-effective regeneration. Whether you require deep drying of compressed air, CO₂ scrubbing for anesthesia circuits, or VOC abatement for industrial exhaust, our desiccant and adsorbent solutions deliver reliable, long-lasting performance.
Activated alumina balls are white, spherical porous pellets manufactured from high-purity aluminum oxide (Al₂O₃) through a specialized process that creates a highly developed microporous structure.
Key Specifications:
Parameter | Typical Value |
Al₂O₃ content | ≥92% – 93% |
Specific surface area | 280 – 380 m²/g |
Total pore volume | ≥0.38 – 0.40 cm³/g |
Static adsorption capacity (RH=60%) | ≥16.8 – 19% |
Water adsorption rate | ≥50 – 52% |
Crush strength (3-5mm) | ≥100 – 180 N/pellet |
Bulk density | 0.60 – 0.89 g/cm³ |
Attrition loss | ≤0.1 – 0.3% |
Key Features:
– High adsorption capacity – Specific surface area exceeding 300 m²/g ensures efficient moisture and contaminant removal
– Excellent mechanical strength – High crush strength (≥130-180 N/pellet) and low attrition loss (≤0.3%) prevent powdering and cracking under high-pressure airflow
– Stable regeneration performance – Adsorption capacity restored by heating to 175-315°C; achieves thousands of adsorption-regeneration cycles
– Chemical inertness – Non-toxic, odorless, insoluble in water and ethanol; strong selective adsorption for fluoride ions
Applications: Compressed air drying (pressure dew points to -70°C), instrument air drying, natural gas drying, air separation units, drinking water defluoridation and dearsenification, catalyst carrier.
Soda lime is a granular mixture of calcium hydroxide (Ca(OH)₂) and sodium hydroxide (NaOH) that provides efficient carbon dioxide removal through a controlled chemical reaction. It is non-toxic, odorless, and partially soluble in water.
Key Specifications:
Parameter | Typical Value |
CO₂ absorption capacity | >25% – 35% (by weight) |
CO₂ activity | >35% |
CO₂ absorption rate | >140 L/kg |
Moisture content (H₂O) | 12% – 19% |
Loss on drying | ≤7.0% – 7.5% |
Particle hardness | ≥80% |
Particle size | 2.5 – 5.0 mm (irregular D-shaped) |
Fines content | ≤1.0% |
Bulk density | ~2.0 g/cm³ |
Color change (indicating grade) | White → Purple |
pH (before use) | 12 – 14 |
pH (after use) | ~10 |
Key Features:
– High CO₂ absorption capacity – Each kilogram provides approximately 10 hours of effective CO₂ absorption in closed anesthesia circuits
– Clear color change indicator – Medical-grade soda lime contains pH-sensitive indicator dye (ethyl violet); granules change distinctly from white to purple when exhausted
– Low dust and high hardness – Minimal dust formation (fines ≤1.0%); particle hardness ≥80% ensures minimal attrition
– KOH-free formulation – Medical-grade formulations minimize anesthetic agent degradation and toxic byproduct formation
– Extended service life – Low moisture absorption (<7.5%) ensures stable performance during storage
Applications: Closed-circuit anesthesia systems, respiratory therapy equipment, diving rebreathers, mine refuge chambers, laboratory CO₂ absorption, industrial gas purification.
Honeycomb activated carbon is a specially engineered monolithic structure manufactured from high-quality activated carbon powder through molding and high-temperature activation. The honeycomb configuration creates an effective adsorption surface area at least three times that of conventional columnar activated carbon.
Key Specifications:
Parameter | Standard Grade | High-Performance Grade |
Specific surface area (m²/g) | ≥400 – 750 | ≥750 – 1,000 |
Iodine value (mg/g) | ≥400 – 600 | ≥800 |
CTC adsorption value (%) | ≥35 – 65 | 70 – 80 |
Static benzene adsorption (%) | ≥35 | ≥45 |
Bulk density (g/cm³) | 0.35 – 0.60 | 0.20 – 0.35 |
Cell density (cpsi) | 25/50/100/150/200 | 100 |
Compressive strength (MPa) | Positive ≥0.9; Side ≥0.3 | Positive ≥0.9; Side ≥0.3 |
Pressure drop (at 0.8 m/s, 600mm bed) | ≤490 Pa | ≤490 Pa |
Key Features:
– Exceptional adsorption capacity – Iodine values reaching 800 mg/g or higher; CTC adsorption values of 70-80%
– Ultra-low pressure drop – Approximately 11 times lower than densely packed 4 mm columnar activated carbon at equivalent linear velocities
– Superior mass transfer – Short diffusion distance accelerates both adsorption and desorption rates
– High mechanical strength – Positive compressive strength exceeding 0.9 MPa; side compressive strength above 0.3 MPa
– Water-resistant option available – Secondary-fired grade withstands strong acids, alkalis, and high-humidity environments
– Regenerable – Thermal regeneration restores adsorption capacity for hundreds of cycles
Applications: Industrial VOC abatement (coating, printing, painting, pharmaceutical, petrochemical), spray paint booth exhaust, odor control (wastewater treatment, food processing), indoor air purification, catalyst support for catalytic combustion and SCR systems.
Product | Primary Function | Key Advantage | Regeneration | Service Life |
Activated Alumina Ball | Gas drying, moisture removal | High strength, low attrition | Thermal (175-315°C) | 3-5+ years |
Soda Lime | CO₂ chemical absorption | Visual exhaustion indicator | Non-regenerable | ~10 hours/kg |
Honeycomb Activated Carbon | VOC/odor adsorption | Ultra-low pressure drop | Thermal | Hundreds of cycles |
– Comprehensive portfolio – Drying, CO₂ removal, and VOC adsorption solutions under one roof
– Proven performance – Activated alumina: >50% water adsorption; soda lime: >140 L/kg CO₂ capacity; honeycomb carbon: ≥800 iodine value
– High durability – Activated alumina: >100-180 N/pellet crush strength; honeycomb carbon: >0.9 MPa compressive strength
– Regeneration-ready – Thermal regeneration extends service life and reduces operating costs
– Application-specific engineering – Tailored to your gas composition, flow rate, dew point, and purity requirements
– Global support – Technical support across North America, Europe, and Asia
HENTEKCAT Desiccant and Adsorbent – Engineered for Performance, Reliability, and Cleaner Air.
