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Removal of Volatile Organic Silicon Compounds (Siloxanes) from Landfill Gas by Adsorbents  

Seo, Dong-Cheon (Green Technology Research Center, SUDOKWON Landfill Site Management Corp.)
Song, Soo-Sung (Green Technology Research Center, SUDOKWON Landfill Site Management Corp.)
Won, Jong-Choul (Green Technology Research Center, SUDOKWON Landfill Site Management Corp.)
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.9, 2009 , pp. 793-802 More about this Journal
Abstract
Adsorption properties were estimated for the organic silicon compounds (siloxanes) in an actual landfill gas (LFG) using adsorbents such as coconut activated carbon, coal activated carbon, silica gel, sulfur adsorbent, carbonized sludge, and molecular sieve 13X. Coconut activated carbon showed the highest removal efficiency of more than 95%. The desorption of hexamethyldisiloxane (L2) from the adsorbent, however, resulted in the remarkable concentration variation of the compound in the treated gas. Silica gel, which had high adsorption capacity for L2 in single substance adsorption experiment in the other study, could not remove the component in the actual landfill gas while it adsorbed well octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) in the LFG. Therefore the elimination of hexamethyldisiloxane is an important factor to determine the level of total organosilicon compound in pretreated landfill gas. Moreover, the L2 from the actual landfill gas was effectively adsorbed by the serial adsorption test using two columns packed with coconut activated carbon which has the great capacity of siloxanes removal among others. In order to utilize efficiently LFG as a renewable energy, the emission and adsorptive characteristics of the substance to be treated should be considered for the organization, operation, and management of pretreatment process.
Keywords
Volatile Organic Silicon Compounds; Siloxane; Landfill Gas (LFG); Adsorption; Renewable Energy;
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Times Cited By KSCI : 2  (Citation Analysis)
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