Makoto Kitano

The University of Tokyo, Research Center for Advanced Science and Technology
(2737-9 Naruse, Machida city 194-0044 Japan)

Abstract

An equilibrium chlorine-gas concentration from some chlorides, NaCl, KCl, CuCl, NiCl2, ZnCl2 and FeCl2 was studied. The result showed that chlorine-gas liberation from NaCl and KCl can be ignored. The equilibrium concentration of CuCl increased as temperature decreased from 1,000 to 500K, while other chlorides displayed the opposite tendency. The concentration from CuCl was about 103-105ppm at 500K in the presence of 0.1atm O2, but others were 3-100ppm. The result also showed that the order of chlorides characterized as a high chlorine gas producer was CuCl, FeCl2, ZnCl2 and NiCl2.

Key words: chlorine gas, chlorides, CuCl, dioxin, thermodynamics