Pellets Activated Carbon Is Used For Air / Gas Desulfurization H2S

Air Desulfurization Activated Carbon for H₂S & Sulfur Gas Removal

Hydrogen sulfide (H₂S) is one of the most challenging gases in industrial air treatment.

It causes corrosion, strong odors, and environmental compliance issues.

Standard activated carbon is not enough.

Effective air desulfurization requires chemically impregnated activated carbon designed specifically for sulfur compounds.

Flue gas desulfurization presents unique challenges: high humidity, corrosive sulfur compounds, and massive air volumes. Standard activated carbon fails quickly under these conditions. Our 4mm pelletized activated carbon is specifically formulated with enhanced hydrophobic properties and high CTC activity to deliver consistent SO₂ and H2S removal—even in moisture-saturated exhaust streams.

 
Activated Carbon for Air Desulfurization & H₂S Removal

Impregnated activated carbon is widely used in air desulfurization systems to remove hydrogen sulfide (H₂S), mercaptans, and other sulfur compounds through chemical adsorption and catalytic reactions.

How Activated Carbon Removes H₂S from Air

Unlike standard carbon, impregnated activated carbon removes H₂S through a combination of adsorption and chemical reaction.

The impregnated chemicals (such as KOH or KI) react with H₂S and convert it into stable compounds, preventing release back into the air.

Types of Activated Carbon for Air Desulfurization

To achieve highly efficient desulfurization, activated carbon is typically classified based on its physical form and chemical treatment method:

• Coal-Based Pellet (Columnar) Activated Carbon: Coal-based columnar activated carbon is the most widely used type for air desulfurization. Its high mechanical strength (Hardness ≥95%) and low airflow resistance make it ideally suited for industrial desulfurization towers handling large air volumes.
• Impregnated Activated Carbon (Chemically Treated): For acidic gases such as hydrogen sulfide (H₂S), standard activated carbon offers only limited adsorption capacity. By impregnating the carbon with potassium hydroxide (KOH) or potassium iodide (KI), it acquires both chemical adsorption and catalytic capabilities, enabling it to convert sulfides into stable compounds.
• Catalytic Activated Carbon: This type of activated carbon does not necessarily rely on high-loading impregnating agents; instead, by modifying the functional groups on the carbon surface, it utilizes moisture and oxygen present in the air to directly catalytically oxidize H₂S into elemental sulfur or sulfuric acid, thereby offering a significantly longer service life.
• Coconut Shell Activated Carbon: In certain small-scale, precision air purification systems where purity requirements are exceptionally stringent, nut-shell-based carbon is also utilized as a substrate for impregnation, leveraging its highly developed microporous structure.

1. Hydrophobic Formulation for High-Humidity Flue Gas
   Unlike standard carbons that lose adsorption capacity in wet scrubber exhaust, our 4mm pellets feature an enhanced hydrophobic surface that prioritizes SO₂ and H2S capture even at 90%+ relative humidity. This is critical for waste incineration, sludge drying, and wet FGD bypass applications.
2. Low Ash, Long Service Life in Corrosive Environments
   Controlled ash content (≤10%) minimizes secondary particulate generation and reduces the risk of acidic ash leaching that can corrode downstream ductwork.
3. Optimized 4mm Geometry for Deep-Bed Desulfurization
   The uniform cylindrical shape creates consistent bed porosity, preventing channeling and ensuring full utilization of the carbon bed in tall adsorbers typical of flue gas treatment systems.
4. High Mechanical Strength for Thermal Regeneration
   With hardness ≥95%, our pellets maintain structural integrity through multiple thermal reactivation cycles—a key cost-saving advantage for power plants and steel mills operating continuous emissions monitoring.
   
   

Custom Supply & Delivery

25kg / 500kg

pallet

OEM

7–30 days

global shipping

After-Sales Guarantee:

We offer complimentary sample testing and provide technical guidance. For bulk purchases, we offer customized solutions and preferential pricing; furthermore, we guarantee free returns or exchanges for any quality-related issues occurring within the warranty period.

Trust & Credibility:

1. Certifications: We hold ISO 9001 Quality Management Certification and NSF/ANSI 61 Standard Certification, ensuring full compliance with safety requirements for drinking water treatment applications.
2. Proven Track Record: We serve numerous water treatment plants and chemical enterprises worldwide, consistently delivering reliable performance in both industrial wastewater and drinking water purification projects, and enjoying an excellent reputation within the industry.
3. Professional Support: Backed by over 25 years of experience in the R&D and manufacturing of activated carbon for water treatment, we provide personalized, one-on-one guidance to assist you in selecting the optimal product for your specific needs.

Q1: Can standard activated carbon remove SO₂ from flue gas?

Standard carbon has limited SO₂ capacity. For effective flue gas desulfurization, we recommend high-CTC pelletized carbon with hydrophobic treatment to maintain performance in humid exhaust.

Q2: How does high humidity affect desulfurization performance?

Moisture competes for adsorption sites. Our hydrophobic formulation reduces water uptake, preserving pore volume for SO₂ and H2S capture.

Q3: What's the difference between activated carbon and activated coke for desulfurization?

Activated coke has lower surface area but higher mechanical strength. Our 4mm pellets offer a middle ground: high CTC activity with sufficient hardness for deep-bed operation.

Q4: Can this carbon be thermally regenerated after sulfur loading?

Yes. Our high-hardness pellets withstand multiple thermal reactivation cycles. We offer spent carbon take-back and regeneration services.

Q5: What bed depth is recommended for H2S removal in wastewater odor control?

For typical WWTP odor control, 0.8–1.2 meter bed depth with 1.5–2.0 second contact time provides effective H2S breakthrough delay.