Hi all,
could anyone give me a hint, in which pyrolysis products can potassium ferrocyanide K4[Fe(CN)6] (Yellow Prussiate of Potash) degrade?
I would pyrolyze it to about 1100 °C in Ar flow a TGA capillary hyphenated to the quadrupole MS and I´m just curious which possible volatile products I can obtain. H2O and HCN and further?
Is there a risk of (CN)2 formation and/or of KCN to remain in the TGA crucible?
Could one of the remains be ferrous ferricyanide (Turnbull's Blue)?
About the seemingly possible HCN formation by high temperature thermolysis of the considered compound, being hydrogen or H-containing species present, you may also check the following discussion: https://www.researchgate.net/post/formation_of_cyanide_in_vacuum_sintering_in_high_temps_like_2000_C_with_nitrogen_atmosphere
It depends on your temperature raising rate. At 1100 oC, there will be no problem at all. before reaching this temperature, there will be possibility for KCN volatile gas.
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