Abstract
Amorphous iron hydroxide-based material was selected as a suitable adsorbent for the siloxanes from biogas and landfill gas. The adsorptive characteristics of the desiloxanation (DeSiloxs) process were studied through a lab-scale experiment using a simulated gas containing a mixture of siloxanes (D4, and D5) and a field experiment on an actual environment scale. The iron hydroxide-based adsorbents exhibited high activity in adsorption of siloxanes during lab-scale experiments, where the obtained adsorption capacity was about 26.3 % with N2 as a carrier gas. However, from an applicability point of view, the effectiveness of the siloxane removal process was significantly affected by the space velocity during the in-situ test in anaerobic digestion gas plant using wastewater sludge. In the experimental case of various space velocities (50, 100, 300 h−1), a very high removal efficiency (100 %) was obtained.
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