Abstract

VASCO-ECHEVERRI, Oscar; RAMIREZ-CARMONA, Margarita  and  GOMEZ-MOJICA, Julián. Mathematical Models Applied to Biogas contaminants Breakthrough Curves. Rev. ion [online]. 2016, vol.29, n.1, pp.81-94. ISSN 0120-100X.  https://doi.org/10.18273/revion.v29n1-2016007.

In this project biogas was purified using separate packed bed adsorption columns using activated carbon, iron filings, kaolin and calcium carbonate. Experiments were performed in 2cm diameter and 9cm length polypropylene columns. The breakthrough curves were constructed with an average biogas flow of 2.2L per day. Samples were taken for almost 28 days, which biogas composition were quantified using gas chromatography and online gas analyser. The curves were fitted to three mathematical models. Using activated carbon a correlation coefficient of 0.9987 and 0.9991 for hydrogen sulfide (H₂S) and ammonia (NH₃), respectively, were obtained. In the case of iron filings a correlation coefficient of 0.9945 and 0.9975 for H₂S and NH₃, respectively, were obtained. Using kaolin a correlation coefficient of 0.9994 and 0.9885 for H₂S and NH₃, respectively, were obtained. Finally, using calcium carbonate with a correlation coefficient of 0.9988 and 0.9985 for H₂S and NH₃, respectively, were obtained. Removal percentage of H₂S and NH₃ using activated carbon was 72.6%, iron filings was 74.1%, kaolin was 32.7% and calcium carbonate was 65.4%.

Keywords : Mathematical models; breakthrough curves; biogas purification; Hydrogen sulfide; ammonia; adsorption.

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