Abstract—In this study,90% purity zero-valent iron selected as hydrogen sulfide adsorbent was introduced to a biogas-tobiomethane
generation. The average H2S concentration of 211,
138 and 139 ppmwas introduced into the chemical H2S
elimination system. The both tests result showed that the H2S-
concentration 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 pHon 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
obtained95% at pH6 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 metalcorrosion but also preventsthe environmental pollution.
Index Terms—Anaerobic digestion, biogas, purification, zero-valent iron (Feo), hydrogen sulfide (H2S).
The authors are with the Department of Advanced Mechanical System Engineering, Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 Japan (e-mail: rashedshahi@gmail.com).
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Cite:Muhammad Rashed Al Mamun and Shuichi Torii, "Removal of Hydrogen Sulfide (H2S) from Biogas Using Zero-Valent Iron," Journal of Clean Energy Technologies vol. 3, no. 6, pp. 428-432, 2015.
