Rapid method for measuring the VOC-adsorption and desorption properties of bamboo and Bincho charcoal

Abstract

The volatile organic compound (VOC)-adsorption properties of bamboo and Bincho charcoal were estimated using gas chromatography (GC) based on the finding that the peak area at a predetermined retention time in GC is directly related to the amount of VOC residue that was not adsorbed by bamboo and Bincho charcoal. Bamboo and Bincho charcoal showed strong adsorption of p-xylene and citronellol compared to benzene, carvone, geraniol, menthone and pulegone. The VOC-desorption properties of bamboo and bincho charcoal that had adsorbed VOC were investigated by EGA-IAMS using a skimmer interface. The EGA peak of p-xylene started to appear at over 60°C, and showed a maximum intensity at around 180°C. The EGA peak of carvone started to appear at 30 oC, showed maximum intensity at around 80°C, and decreased in peak intensity at 130°C. These results suggested that the evolution of p-xylene and benzene that had been adsorbed by charcoal was not observed at room temperature. EGA-IAMS using a skimmer interface can be used to monitor VOC desorption from charcoal that has adsorbed VOC.

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