Sulistiyo, Kevin Leonardo (2026) Pengaruh Larutan Aktivator Terhadap Efektivitas Pemurnian Biogas Dalam Penurunan Kandungan CO2 dan H2S Menggunakan Karbon Aktif. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
This study aims to analyze the effectiveness of sodium hydroxide (NaOH) and potassium hydroxide (KOH) activating solutions on activated carbon, as well the effect of sampling time from 10 to 60 minutes on the purification of cow manure biogas to reduce carbon dioxide (CO2) and hydrogen sulfide (H2S) levels while increasing methane (CH4) content. The adsorption process was conducted in a reactor with a diameter of 1,5 inch, an adsorbent bed height of 50 cm, and a biogas flowrate of 0,2 L/min. Initial testing of the raw biogas revealed CH4, CO2, and H2S concentrations of 40,84%; 45,34%; and 100 ppm, respectively which do not meet the SNI 8019:2014 quality standards. The results demonstrated that the maximum reduction in CO2 concentration was achieved using the NaOH activator at minute 10, reaching a final concentration of 36,05% with a removal efficiency of 20%. Both activators optimally removed H2S gas at minute 10. However, the KOH activated adsorbent sustained its H2S adsorption capacity longer, retaining an H2S concentration of 40 ppm up to minute 50, compared to NaOH, which remained at 80 ppm. The peak CH4 concentration was attained under the NaOH treatment at minute 10, reaching 51,86% with an enrichment efficiency of 21%. Based on MANOVA statistical analysis, sampling time had a significant effect on all biogas quality parameters (p-value < 0,05), whereas the activator type only significantly affected the reduction of CO2 concentration. Isotherm analysis indicated that CO2 adsorption was better fitted to freundlich model, while H2S adsorption tended to follow the langmuir model. Overall, NaOH activation is more effective for CO2 removal, whereas KOH activation is superior in sustaining H2S adsorption capacity.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TD Environmental technology. Sanitary engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Environmental Engineering | ||||||||
| Depositing User: | Kevin K Sulistiyo | ||||||||
| Date Deposited: | 01 Sep 2026 04:19 | ||||||||
| Last Modified: | 01 Sep 2026 04:46 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/59506 |
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