On the Analysis of Linear Pyrolysis Experiments
LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA
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Part One A Modified Linear Pyrolysis Experiment. A linear pyrolysis experiment utilizing a heated porous plate is proposed and analyzed. Simple and chainlike surface gasification processes are defined and discussed. The conditions under which the surface process is a rate process or one of near equilibrium are determined in the general case and for chainlike processes. It is shown that pyrolysis measurements yield the forward gasification rate in the limit of a surface rate process and the equilibrium vapor pressure in the limit of surface equilibrium. The pyrolysis of potassium chloride is calculated. Part Two Remarks on the Interpretation of Pyrolysis Experiments on Ammonia Salts. Previous interpretations by other investigators of linear pyrolysis rate measurements for NH4CL, NH4NO3, and NH4CLO4 assumed that the surface process is an unopposed rate process. This report presents and alternative interpretation of pyrolysis experiments which may be valid even when the surface process is near equilibrium. Some features of a previous given analysis of a modified pyrolysis experiment Part One are employed to demonstrate that the difference between the plate temperature and the surface temperature of the solid may be large enough to affect seriously the activation energies which were calculated from the previous linear pyrolysis data.
- Physical Chemistry