| 초록 |
Biogas from anaerobic digestion of biological wastes is a renewable energy resource. It has been utilized to provide heat and electricity. Raw biogas contains about 55-65% methane, 30-45% carbon dioxide, 0.5% of hydrogen sulfide gas and fraction of water vapor. The presence of CO2 and H2S in biogas affects less caloric value of raw biogas and corrosion of engine etc.. Reducing CO2 and H2S contents improves a quality of fuel. In this work, the absorption process using aqueous monoethanol amine has been investigated as one of the leading technologies to purify the biogas. liquid absorbent is circulated through the reactor, contacting the biogas in countercurrent flow. In this paper the experimental results of the methane purification in simulated biogas mixture consisted of methane, carbon dioxide and hydrogen sulfide were presented. It was shown that using aqueous solution used is effective in reacting with CO2 in biogas and it was possible to achieve the purification of methane from the concentration of 55% up to 98%. This technique proved to be efficient in enriching and purification of biogas and has to be used to improve process efficiency. |
