StudiesonthermalstabilitiesofcoordinationcompoundsbygaschromatographyⅨ.ThermaldecompositionofFe2（C2O4）3-HZSM-5andFe2（C2O4）3-HY

<正> Some properties and thermal decomposition of iron（Ⅲ）oxalate supported on HZSM-5and HY zeolites have been studied by GC,IR,and Mssbauer spectroscopy methods.Thermaldecomposition of unsupported iron（Ⅲ）oxalate took place in two stages:as indicated by peak a（givingCO2）and peak γ（yielding CO and CO2）,but for iron（Ⅲ）oxalate supported on zeolites,an addi-tional peak β（producing CO and CO2）appeared as a result of the interaction between C2O42- andAl3+.At 500℃ Fe2（C2O4）3-HZSM-5 system produced α-Fe in H2 due to the weak interaction be-tween the salt and the support.For Fe2（C2O4）3-HY system in H2,at 500℃ the solid products con-sisted of α-Fe and a little highly dispersed Fe（0）together with Fe（Ⅱ）and F（Ⅲ）oxides,which weredifficult to be reduced.