SIMULTANEOUS DYNAMIC THERMOGRAVIMETRY AND MASS SPECTROMETRY OF THE EVAPORATION OF ALKALI METAL NITRATES AND NITRITES.

Article abstract of DOI:10.1007/BF01914677

Six alkali metal nitrates and nitrites were evaporated in vacuum at a constant heating rate in a combined mass spectrometric and thermogravimetric apparatus. Time resolved profiles of decomposition gases and kinetics were obtained for LiNO//3, NaNO//3, KNO//3, Na/KNO//3, NaNO//2 and KNO//2. Activation energies for the evaporation of these salts were calculated and compared to previous results of isothermal experiments. In the temperature range 650-850 K, the decomposing nitrates released NO, N//2 and O//2 while the nitrites released only NO and N//2.