Adsorbsi gas karbon dioksida dalam biogas dengan menggunakan endapan batu kapur

R. Sutanto; A. Mulyanto; M. Wirawan; I.B. Alit; N. Nurchayati

doi:10.29303/dtm.v9i2.290

Adsorbsi gas karbon dioksida dalam biogas dengan menggunakan endapan batu kapur

R. Sutanto, A. Mulyanto, M. Wirawan, I.B. Alit, N. Nurchayati

Abstract

With the depleting reserves of energy sources and fuel shortages that occur in Indonesia today, it is needed a cheap alternative energy sources and environmentally friendly, one of which is biogas. In this study biogas is generated from horse manure. The fermentation of horse manure can produce biogas with the largest component of the CH₄ (49.5%) and CO₂ (49.7%). The use of biogas as a fuel is still in the household scale and has not been used optimally. This is due to the biogas still containing high levels of CO₂ so that it has low value of heat is produced. This research reduces the CO₂ levels by using the Ca(OH)₂ or limestone sedimentary, and then react with the CO₂ to form CaCO₃ and H₂O. The variables studied are the influence of the flow rate of the biogas that CO₂ absorbed and CH₄. CO₂ absorption made by passing the biogas with a variety of flow rates in the Ca(OH)₂ at a certain concentration. Gas and Ca(OH)₂ contact each other and the chemical reaction occurs. Every 2 minute interval of gas coming out of the absorber is detected by a biogas tester for analysis of absorbed CO2 and CH4 produced. The research results show that the average CO₂ can be absorbed at all the variations of biogas flow rate (5 liter/min. 10 liter/min and 15 liter/min) produced CH₄ at the biogas flow rate of 10 liter/min is 91%, then at the flow rate of 5 liter/min is 76.2% and at the flow rate of 15 liter/min is 72%.

Keywords

Biogas; Absorption; Carbon dioxide; Calcium hydroxide

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DOI: https://doi.org/10.29303/dtm.v9i2.290