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Solvent Selection for the Detection of Siloxanes in Landfill gas  

Kim, Nack-Joo (Department of Fine Chemistry, Seoul National University of Technology)
Choi, Ju-Mi (Department of Fine Chemistry, Seoul National University of Technology)
Ji, Eun-Jung (Department of Fine Chemistry, Seoul National University of Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.29, no.8, 2007 , pp. 915-921 More about this Journal
Abstract
As a preliminary measurement of siloxanes in landfill gas(LFG), this study was conducted to determine the best suitable solvent applicable to the extraction of siloxanes in the domestic landfill using liquid-absorption method. Three solvents of n-hexane, acetone, and methanol were tested and the results obtained from GC analysis for each solvent were compared to their properties. Results showed that the resolution in the GC spectrum was the best from methanol due to the lack of overlapping of the peaks between silane and solvent. The detected siloxanes concentration were varied at maximum 2.6 times depending on the types of solvent as well as extraction velocity and impinger steps. In total, the highest concentration of siloxanes was obtained from methanol, which showed ideal pattern in the absorption of each impinger step and the least relative standard deviation. Accordingly, it is concluded that methanol is the most suitable solvent for the extraction of siloxanes in the domestic landfill. However, it is considered that solvent suitability can vary depending on the waste components and landfill record in landfills.
Keywords
Siloxanes; LFG; Liquid Adsorption; Resources;
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  • Reference
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