ACTIVATED CARBON PROCESS
Typically, desulfurization via dry scrubbing is achieved with an iron based catalyst. The main advantages of using iron based desulfurization media are its low cost and high desulfurization capacity. However, the chemical reaction occurring during the capture of hydrogen sulfide tends to agglomerate the media pellets into larger chunks, which renders spent media removal a time consuming chore. For this reason, landfill gas and biogas desulfurization has been trending towards the use of activated carbon as the desulfurization media.
This is a high performance desulfurization activated carbon specifically made for biogas and landfill gas applications. This media requires a relative humidity range of 60% to 80%, a temperature range of 30°C (86°F) to 40°C (104°F), and an oxygen to sulfur ratio of 3 to 1 for optimum performance.
Tests performed on our activated carbon desulfurization systems have demonstrated outlet concentrations of less than 2 ppmv after one year of operation with an average H2S inlet concentration of 6,000 ppmv.