Evaluation of Hydrogen Sulfide Removal of Biogas with Ecuadorian Clay Modified with sodium, zinc, cooper and Morphologically Adapted
DOI:
https://doi.org/10.18041/1794-4953/avances.1.6110Keywords:
Clay, Biogas, desulphurization, extrudates, removal.Abstract
The H2S removal capacity, of an Ecuadorian clay was studied. The clay was modified with Na, Cu, and Zn, and then morphologically adapted to the shape of extrudates. The H2S removal capacity was evaluated, using a fixed bed filter that contained the extrudates, coupled to a biogas stream, with 2.2% H2S, and flow of 1mL/s, at a gauge pressure of 2 psig, and environment temperature of 30 °C. The biogas stream came from an anaerobic vinasse treatment bioreactor. The H2S concentration at the inlet and outlet of the filter was determined by means of GASTEC 4H and 4HH ampoules, using a GASTEC GV-100-S-TR aspiration pump. The best results were obtained with the solid ST15% Na15% Cu15% Zn, which maintained its sorption characteristics for 920 min before saturating, removing 2.84 mmol of H2S/g of sorbent while industrial activated carbon, used to reduce H2S concentration, had a removal capacity of 2.58 mmol of H2S/g of carbon and saturated at 540 min.
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