Abstract—In this study, 90% purity zero-valent iron selected
as hydrogen sulfide adsorbent was introduced to a biogas-to-biomethane
generation. The average H2S concentration of 211,
138 and 139 ppm was introduced into the chemical H2S
elimination system. The both tests result showed that the H2Sconcentration
could reach below 50 ppm which acceptable for
running in internal combustion engines. In this process the
removal of H2S depends on the use of the removal substances
and pH. The effect of pH on the H2S removal with Feo is
attributed to the formation of FeS through the precipitation of
Fe(II) and sulfide. The maximum absorption efficiency was
obtained 95% at pH 6 for Feo, which are higher than
conventional adsorbents. The H2S removal using zero-valent
iron reduced high operation cost and risk factor to the process.
Therefore, it is still highly recommended not only for
preventing metal corrosion but also prevents the
environmental pollution.