SO₂ Removal ≥95%
Stable desulfurization performance for industrial flue gas emission control.
For Low- to Medium-Temperature Industrial Flue Gas Desulfurization
S-1-111 Bamboo-Based Activated Carbon Desulfurization Catalyst
Bamboo-based porous carbon support combined with dedicated catalytic components for efficient flue gas desulfurization.
Designed for industrial flue gas at 40–180°C, with SO₂ removal ≥95% and sulfuric acid mist removal ≥90%, and supports in-situ regeneration for repeated use.
Wide Operating Temperature Range
Stable catalytic performance across flue gas temperatures from 40 to 180°C.
In-Situ Regeneration
Multi-stage dilute sulfuric acid rinsing enables in-situ regeneration and repeated use.
High Mechanical Strength & Acid-Wash Resistance
Dense, robust pellets resist breakage and attrition during loading and repeated regeneration.
Overview
DAQI Technology S-1-111 is a bamboo-based activated carbon desulfurization catalyst for 40–180°C industrial flue gas, delivering up to 95% SO₂ removal and 90% sulfuric acid mist removal. It supports in-situ regeneration for repeated use.
Applications
Technical Specifications
PropertyTypical Value
Physical Properties
AppearanceBlack cylindrical pellets
Diameter3.5–4.5 mm（φ4±0.5 mm）
Length4–10 mm
Bulk Density350–600 g/L
Moisture Content≤4%
pH8–10
Ignition Temperature≥250°C
Packaging1 m³/bag (FIBC bulk bag)
Loading MethodBulk Filling
Performance
SO₂ Removal Efficiency≥95%
Sulfuric Acid Mist Removal Efficiency≥90%
Desulfurization Activity ≥35 mg/cm³ (Coking, SO₂ ≤500 mg/m³); ≥40 mg/cm³ (Sulfuric Acid, SO₂ >500 mg/m³)
Initial Mechanical Strength≥200 N/cm
Mechanical Strength After Acid Washing≥100 N/cm
Operating Conditions
Recommended Temperature40–180°C
Water Vapor Content>3%
Oxygen Content>3%
Inlet SO₂ Concentration<6000 mg/m³
Dust Concentration<30 mg/m³
Tar Content<0.5 mg/m³
NOₓNo Specific Limit
Heavy MetalsNo Specific Limit
FAQ
What Is the Reaction Mechanism, and How Does Temperature Affect Performance?
SO₂ is removed through four main reaction steps: ① O₂ → 2O* (oxygen activation); ② SO₂ + O* → SO₃* (catalytic oxidation); ③ H₂O + SO₃* → H₂SO₄* (hydration); ④ nH₂O + H₂SO₄* → H₂SO₄·(nH₂O) (dilution and adsorption). At lower temperatures, physical adsorption plays a larger role. As temperature increases, chemisorption becomes dominant. Abundant oxygen-containing functional groups such as –OH, C–O–C and C–O promote the conversion of SO₂ to SO₃.
How Is the Catalyst Regenerated?
The catalyst is regenerated in situ using a multi-stage dilute sulfuric acid circulation and spray process. Before regeneration, the bed is purged with nitrogen and cooled to below 60°C. Each regeneration stage should last at least 30 minutes. After regeneration, the catalyst should stand for at least 24 hours until excess water has drained and no visible dripping remains. The regenerated catalyst can then be returned to service, allowing multiple operating cycles.
Can It Treat High-Concentration SO₂ Flue Gas?
The recommended inlet SO₂ concentration is below 6,000 mg/m³. For higher concentrations, upstream pretreatment such as pre-absorption or dilution is recommended to protect the catalyst and maintain stable desulfurization performance.
What Is the Typical Catalyst Service Life?
Service life depends on actual operating conditions, including temperature, flue gas composition and dust concentration. Under recommended conditions, the catalyst can undergo multiple regeneration cycles. When its activity no longer meets process requirements, contact DAQI Technology for replacement guidance. Do not dispose of the spent catalyst without proper technical assessment.
What Should Be Avoided During Operation?
① Do not introduce flammable gases into the catalyst bed due to fire risk. ② Avoid organic gases or vapors that may block pores and reduce catalyst activity. ③ Minimize dust ingress to prevent pore blockage. ④ Continuously monitor bed temperature and provide an emergency spray system to prevent overheating. ⑤ During shutdown, do not expose the catalyst bed to air before it has cooled sufficiently.
What Are the Storage and Handling Requirements?
① Inspect packaging integrity and quantity upon receipt. ② Store in a clean, dry location protected from moisture and foreign materials. ③ Keep away from ignition sources. Although the ignition temperature is ≥250°C, appropriate fire-prevention measures are still required. ④ Before loading, ensure the reactor is clean and free of metal debris, dust and other contaminants. ⑤ Loading should be carried out under professional technical guidance. Mechanical vibration during loading is prohibited.
