Ozone Degradation by Fluoride onto Plasma-Treated Activated Carbon in CF4

✍ Scribed by Seiki Tanada; Naohito Kawasaki; Takeo Nakamura; Takashi Ohue; Yasuhiro Torii

• Book ID: 102580343
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 69 KB
• Volume: 190
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1997.4902

✦ Synopsis

have reported the structural analysis of tetrafluoromethane

The ozone degradation of fluorine was investigated using the plasma-treated activated carbon (PT-AC) using nitrogen adtetrafluoromethane plasma-treated activated carbon ( PT-AC ) . sorption method (1) and the recovery of the volatile haloge-The ozone in the stratosphere has been degraded by the chloride nated hydrocarbons, trichloroethylene and 1,1,1-trichloroand bromide radicals which are produced from chlorofluoroethane, using PT-AC (2-4). Ohte et al. (5) reported that carbons and bromofluorocarbons, respectively. However, we bethree types of fluorine were introduced by tetrafluoromethlieve that fluorine also was related to the ozone degradation.

ane plasma treatment: covalent bond type, interstitial layer

The fluoride was introduced onto the activated carbon surface type, and adsorption type. We believed that PT-AC could by tetrafluoromethane plasma treatment. The breakthrough be used to estimate the extent of ozone degradation by the curve of ozone onto PT-AC was measured to elucidate the relationship between the ozone and the fluoride. The amount of fluorine.

ozone adsorbed / degraded onto the PT-AC was larger than the

In the present study, we have investigated the amount of amount that was adsorbed / degraded onto the untreated actiozone adsorbed/degraded onto PT-AC and the amount of vated carbon. The amount of fluoride ion eluted from the PTfluoride ion eluted from the activated carbon surface to eval-AC before the adsorption / degradation of ozone was larger than uate the ozone degradation by fluoride on the PT-AC surface.

that which eluted after the adsorption / degradation of ozone. These results indicated that the ozone was degraded by the MATERIALS AND METHODS fluoride on the PT-AC surface.