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pp. 2275-2287 | Article Number: ijese.2017.154
Published Online: December 28, 2017
Abstract
In upgrading raw natural gaseous fuel, CO2 has to be removed. Waste rubberwood ash solution was applied in CO2 absorption. The pH of the rubberwood ash suspension was max. 12.4, with the main dissolved minerals being potassium, magnesium and sodium, and no significant amounts of heavy metals were found. Rubberwood ash solution was able in a packed column reactor to remove 41% v/v of CO2 in an N2 stream. The highest 95.2 % CO2 removal efficiency was achieved at the gas flow and absorbent flow rates of 600 L/h and 500 L/h, respectively, and required 35.4 kg ash/kg CO2 removed. A concept for the application of rubberwood ash in biofuel production for biomass power plant is proposed. The discussion reveals the possibility of a good practice waste management utilizing waste ash in upgrading gaseous fuel and furthermore in environmentally benign biofuel production.
Keywords: carbon dioxide; rubberwood ash; chemical absorption; packed column
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