CPL/Puragen Activated Carbons – Finalist Award Biogas Problem Solver

Activated carbon filtration is commonly used in the biogas and biomethane industries to remove hydrogen sulfide (H2S) and other contaminants like ammonia, siloxanes, and VOCs. Typically, spent activated carbon can be recycled through thermal reactivation, reducing carbon footprint by over 90% compared to using virgin carbon.

CPL/Puragen operates two reactivation facilities in the UK, one for drinking water (CR1) and one for industrial applications (CR2). However, reactivating spent carbon from biogas has been difficult due to high sulfur content, leading to landfill or incineration.

After extensive R&D, CPL/Puragen developed a proprietary process called 'CR3', enabling the recycling of high-sulfur spent carbon, preventing waste and pollution across the UK and Europe.