Encontro de Energia no Meio Rural
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Abstract

SOUZA, Samuel Nelson Melegari de, NEITZKE, Guilherme, MAGALHAES, Edney A. et al. Confection and appraisal of performance of a remotion CO₂ system from biogas. In Proceedings of the 6. Encontro de Energia no Meio Rural, 2006, Campinas (SP, Brazil) [online]. 2006 [cited 26 April 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022006000100040&lng=en&nrm=iso> .

The biogas is an alternative fuel produced by the biomass anaerobic digestion (organics wastes) and is composed by methane and carbon dioxide. The shift the composition of biogás is very important because increases its viability of use as biofuel. The remotion of carbon dioxide (CO₂) to result in an increasing the concentration of methane (CH₄) in biogas composition and became the lower heating value higher. One decreasing the concentration of acid hydrosulphide (H₂S) reduce the corrosion produced during the use of biogas in thermal systems for the secondary energy production. This work aimed to develop a phisical and chemical mechanism for remotion of CO₂ from biogas. The device has made, was a absorption column stuffed, with 250 cm of high and 30 cm of diameter, using pipe of PVC rigid of 20 mm of diameter as stuff and water as solvent. It has been done test with inside pressure and gas flow in the column betweem 300 and 500 kPa and 190 and 670 cm³/s. The original biogas has a concentration the 33%% of CO₂. With the utilization of the column´s absorption was obtained reduction in CO₂ concentration of 15%, which showed an increasing of 57% in the lower heating value of biogas per unit of mass.

Keywords : Column of absorption; methane; renewable energy; natural gas.