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- W239551710 abstract "In order to numerically determine the effect of chemical and physical parameters upon particle temperature profiles during pyrolysis, a basic composition model of coal itself needs to be postulated. It is desirable to make the model as straightforward and general as possible in order to more clearly ascertain the effects of systematic parametric changes upon results. Keeping the model initially general also allows maximum freedom in refining the model to take into account additional processes which may change the form of the original transport equation. Given the computational model and scheme described, it remains to determine what parametric value sets, for a given particle size, lead to chemical control of particle decomposition and what value sets lead to heat transport control. Or, given a set of kinetic parameters and reaction conditions, can a change in particle size lead to a transition from chemical control to heat transport control of the initial pyrolytic process. In chemical control, the process is pictured as taking place uniformly throughout the particle and at, or very near, the stated external driving temperature. In heat transport control, the pyrolytic process is viewed as taking place in a relatively thin-shell, reaction zone. The reaction zone shrinks towardmore » the particle center as the pyrolytic process depletes the concentration of pyrolytic material. Both types of processess have been postulated to explain behaviour of coal particles. Experimental conditions and particle sizes varied considerably, however, and the results indicate that such extreme variation in behaviour is indeed plausible, even for the same coal type.« less" @default.
- W239551710 created "2016-06-24" @default.
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- W239551710 date "1977-01-01" @default.
- W239551710 modified "2023-09-23" @default.
- W239551710 title "COMBINED INFLUENCE OF CHEMICAL AND PHYSICAL FACTORS UPON COAL PARTICLE TEMPERATURE PROFILES DURING RAPID HEATING PYROLYSIS." @default.
- W239551710 hasPublicationYear "1977" @default.
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