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[A-6.4 Decomposition of CFCs by Supercritical Water]

[Contact Person]

Masahito Sato
Head of Chemical Systems
Department of Chemical Systems
National Institute of Materials and Chemical Research
AIST, MITI
Higashi 1-1, Tsukuba, Ibaraki 305 Japan
Phone +81-298-54-4666, Fax +81-298-55-1397

[Total Budget for FY1990-1992]

23,912,000 Yen

[Abstract]

　Hydrolysis of CFCs in supercritical water(SCW) was studied to establish the process in which CFCs are completely hydrolyzed and hydrogen halides produced are neutralized. Decomposition of CFCs was increased with the density of SCW. Reaction rate increased with the pressure and strongly related with the static dielectric constant of SCW. Adding sodium hydroxide into SCW, reaction was promoted and hydrogen halides produced were neutralized to prevent the corrosion in the reactor.

[Key Words]

Supercritical Water, Hydrolysis, Chlorofluorocarbon, Freon, Decomposition