Deep Removal of Methyl Mercaptan in Biogas

Abstract:

For a distributed PEMFC power station utilizing biogas as a source to produce hydrogen, deep desulfurization of the biogas is important. ZnO/γ-Al₂O₃ and CuO/γ-Al₂O₃ were prepared by an impregnation method, and their performances on CH₃SH removal in the biogas have been studied. Results showed that CuO/γ-Al₂O₃ is able to remove CH₃SH to below 10 ppb at 250-400 °C and has a sulfur capacity of 0.056 mmol g^-1 at 300 °C. Regarding to the desulfurization mechanism, it has been confirmed that the removal of CH₃SH with CuO/γ-Al₂O₃ is based on chemical adsorption. In the desulfurization, CH₄s dry reforming took place at above 250 °C, and the generated H₂ and CO reduced CuO to Cu₂O and Cu. Further, it was supposed that H₂S generates through the hydrogenation of CH₃SH at the presence of H₂.

• Periodical: Applied Mechanics and Materials (Volume 472)
• Pages: 641-648
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.472.641
• Online since: January 2014
• Authors: Juan Gong*, Yi Fei Jiao, Qing Quan Su, Wan Liang Mi
• Keywords: Adsorbent, Biogas, Deep Desulfurization, Methyl Mercaptan, PEMFC

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