抄録
Pyrolysis products derived from precursors (Polychlorinated benzene: CB/Polychlorinated phenols: CP) or PVC, and products generated in mixed combustion of cellulose and HCl gas were studied. The following facts became evident. PCDD and PCDF were derived from CB and CP both. But the formation quantity of dioxins derived from CP was much greater than from CB. CB, CP and HCl gas were derived from PVC, but PCDD was not derived in the existence of HCl gas. CB and CP were derived from cellulose, but PCDD was not derived in the absence of HCl gas. The existence of HCl gas is one of the determining factors of dioxin formation.