A systematic study of the iron hydroxide-based adsorbent for removal of hydrogen sulphide from biogas

• Published in: Microporous and mesoporous materials Vol. 270; pp. 155 - 160
• Main Authors: Magnone, Edoardo, Kim, Shin Dong, Park, Jung Hoon
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01-11-2018
• Subjects: Adsorption; Biogas; Hydrogen sulphide; Iron hydroxide; Mesoporous adsorbents; Separation techniques; Hydrogen sulphide; Iron hydroxide; Biogas; Mesoporous adsorbents; Adsorption; Separation techniques
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2018.05.018

This study was aimed to evaluate the hydrogen sulfide (H2S) removal efficiency of an economic iron hydroxide-based adsorbent from simulated biogas mixture with an H2S concentration range of 500–10300 ppm. The properties of these porous materials such as crystal structures, surface patterns, surface area, pore volume and pore size were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and BET measurements. The H2S adsorption capacity (Adscap) is nearly independent of the drying temperature of hydroxide-based adsorbent over the range of temperatures tested (100–200 °C) as well as relative humidity (0–80%) under equal conditions of H2S concentration. In addition, the experimental results revealed that the Adscap increased exponentially from 23.3 to 48.7 wt% with the increased retention time from to 0.5–52.9 s and decreasing space velocity from 7433 to 68 h-1. At the same time, Adscap increased linearly from 20.57 to 35.18 wt% with the increasing H2S concentration from 500 to 10300 ppm.
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•Iron hydroxide-based adsorbent with high hydrodesulfurization properties was developed.•Iron hydroxide-based adsorbents were used to remove of hydrogen sulphide from biogas.•Drying temperature no effects the H2S adsorption capacity.•Relative humidity of the inflow biogas no effects the H2S adsorption capacity.•H2S adsorption capacity increases as H2S concentration increases.