The ACF-1500-Comfort DN150 / DN200 activated carbon filter is designed for the final stage of biogas desulfurization and H₂S removal before the gas is supplied to CHP engines or other downstream equipment. In polishing applications, it treats pretreated biogas with residual hydrogen sulfide concentrations of around 50–200 ppm. With suitable activated carbon and appropriate operating conditions, the residual H₂S concentration can be reduced to near-zero levels.

The filter has a 3 m³ activated carbon bed and holds up to 1,500 kg of activated carbon. This capacity supports long intervals between carbon replacements when treating low sulfur loads. Actual carbon service life depends on the inlet H₂S concentration, gas flow rate, carbon grade and operating conditions.

Biogas flow rates: DN150 and DN200

The filter is available with DN150 gas connections for flow rates up to 650 Nm³/h or DN200 connections for up to 850 Nm³/h. The connection size is selected to suit the required biogas flow rate. The maximum pressure loss of 5 mbar helps limit the pressure drop across the gas treatment system.

Stainless steel Comfort design

The vessel is manufactured from stainless steel 1.4571 / AISI 316Ti, selected for its corrosion resistance in biogas applications. The elevated support structure provides clearance beneath the vessel for convenient removal of spent carbon through the DN250 bottom discharge flange.

Fresh carbon is loaded through the Ø500 mm top filling manhole. An access ladder with safety cage is included to facilitate access to the top of the vessel during filling and maintenance. The filter measures 1,600 mm in diameter and 4,200 mm in height.

Carbon loading monitoring

The filter includes three gas sampling points for monitoring activated carbon saturation at 50%, 75% and 90% of the bed. Sampling at these positions helps operators track H₂S breakthrough through the bed and plan carbon replacement.

The ACF-1500-Comfort DN150 / DN200 provides an easy-to-maintain solution for biogas purification, hydrogen sulfide removal, activated carbon filtration and final biogas polishing.