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Removal of CO2 from biogas plant using chemical absorption column

Mel, Maizirwan and Sharuzaman, Muhammad Amirul Hussin and Setyobud, Roy Hendroko (2015) Removal of CO2 from biogas plant using chemical absorption column. In: 1st International Conference on Science and Technology 2015 (ICST-2015), 11th–13th November 2015, Yogyakarta, Indonesia.

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Biogas typically refers to a mixture of gasses produced during the breakdown of biodegradable organic matter in the absence of oxygen. It is primarily comprises 45-75% (v/v) of methane (CH4), 25-55% (v/v) of carbon dioxide (CO2), 2000 ppm of trace element hydrogen sulfide (H2S), and ammonia (NH3). The presence of CO2 and H2S may affect the performance of biogas. Hence, its removal before its use is crucial to improving the quality of biogas. In this work, a method to purify both gasses, CO2 and H2S were employed by using a sodium hydroxide solutions (NaOH). CH4 composition after treatment was also studied as removal of impurities is interrelated to CH4 enhancement. The concentrations of sodium hydroxide were varied as well as the biogas flow rate. Experiments that revealed the highest removal efficiency had been achieved at 14% concentration of sodium hydroxide solution used and the maximum absorption capacity was achieved when CH4 increment is about 54.9% from its original value. In the continuous flow, the composition of CH4 increased up to 26% of H2S removal, however, was unable to achieve the target due to its low concentration (ppm) in biogas mixtures. Hence, there are no significant changes in its concentration that are worth to be analyzed.

Item Type: Conference or Workshop Item (Invited Papers)
Additional Information: 4085/55316
Uncontrolled Keywords: Removal, CO2, biogas, absorption, column
Subjects: T Technology > TP Chemical technology
T Technology > TP Chemical technology > TP248.13 Biotechnology
T Technology > TP Chemical technology > TP751 Gas industry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Dr Maizirwan Mel
Date Deposited: 31 Mar 2017 15:59
Last Modified: 17 Oct 2017 14:54
URI: http://irep.iium.edu.my/id/eprint/55316

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