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Coal-Based Columnar Activated Carbon: The Best Choice for Air & Water Purification?
1. What is Coal-Based Columnar Activated Carbon?
Coal-based columnar (or pellet) activated carbon is a **cylindrical-shaped adsorbent** made from **high-quality bituminous coal**, processed through **extrusion and steam activation**.
Key Features:
✔ **High mechanical strength** – Resists crushing in industrial systems.
✔ **Low pressure drop** – Ideal for **gas-phase applications**.
✔ **Customizable sizes** (1.5mm–4mm diameter).
Technical Specifications:
| **Parameter** | **Specification** | **Testing Method** |
|---------------------|----------------------------|--------------------|
| **Iodine Value** | 800–1100 mg/g | ASTM D4607 |
| **CTC Adsorption** | 50–70% | GB/T 7702 |
| **Diameter** | 1.5mm / 3mm / 4mm | Sieve Analysis |
| **Ash Content** | ≤10% | GB/T 12496 |
| **Moisture** | ≤5% | ISO 562 |
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2. Top Industrial Applications
**① Air & Gas Purification**
- **Removes VOCs, solvents, and odors** in:
- **Industrial exhaust systems**
- **Gas masks & military filters**
- **HVAC air purification**
② Water Treatment
- **Drinking water purification** (removes chlorine, organic matter).
- **Wastewater treatment** (effective for phenol removal).
**③ Chemical & Petrochemical Industry**
- **Solvent recovery** (acetone, benzene).
- **Natural gas purification** (H₂S removal).
**④ Gold Extraction (CIL Process)**
- **Alternative to granular carbon** in some heap leaching applications.
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3. Columnar vs. Granular & Powdered AC – Which is Best?
title "Adsorption Efficiency by Carbon Type"
"Columnar (Gas Phase)" : 50
"Granular (Water Phase)" : 35
"Powdered (Rapid Adsorption)" : 15
✅ **Why Choose Columnar Carbon?**
✔ **Lower pressure drop** – Better airflow in gas systems.
✔ **Higher durability** – Less attrition in moving beds.
✔ **Easier regeneration** – Can be thermally reactivated.
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4. How to Select the Right Columnar Carbon?
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