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| dc.description.abstract | Reduced energy reserves that occurred in
Indonesia today, it needed a new source of alternative energy.
Biogas is one of the alternative energy sources. Typical
biogas contains 50–65% methane (CH4), 30–45%
carbon dioxide (CO2), moisture and traces of
hydrogen sulphide (H2S). Purification of biogas done
to remove the impurities (inhibitor) on biogas such as
carbon dioxide (CO2). Chemical absorption involves
formation of reversible chemical bonds between the solute
and the solvent. Chemical solvents generally employ either
aqueous solutions of alkaline salts (i.e. sodium, potassium
and calcium hydroxides). In the process of purification
chosen liquid NaOH, KOH and Ca(OH)2 because theirs as
absorbent material is highly reactive with CO2. This study
aims to determine the The CO2 absorption using NaOH,
Ca(OH)2 and KOH with the same consentration ( 15 % ).
Absorption method used is missed biogas in the ` alkaline
solution.The results showed that the absorption by using
15 % KOH concentration produced the higest CO2 absorption
with the lowest CO2 content and the highest content of
methane. The KOH solution can increased the CH4 content of
biogas 70,3 % from 33,64 to 57,29 % by volume.The
absorption of CO2 content of biogas was 100 % from 30,18 %
to 0 % by volume.The NaOH solution can increased the CH4
content of biogas 67,07 % from 55,37 to 82,56 % by
volume.The absorption of CO2 content of biogas was 100 %
from 42,33 to 0 % by volume . The absorption of CO2
content usage Ca(OH) solvent was the lowest from the others. | en_US |
