Abstract
The hypotheses of a single-particle model developed by Russel, Saville, and Greene explaining the pressure and particle-size dependence of weight loss in the rapid hydropyrolysis of coal were originally supported by estimates based on experimental data or established theories, with the exception of the equal binary diffusivities assumed for the gas-phase components. Because these diffusivities can actually differ significantly, researchers tested the sensitivity of the model's results by analyzing the alternative limiting case with at least one relatively small binary diffusivity. The results show trends qualitatively similar to the original model. The quantitative differences are significant but may not be detectable experimentally unless the effective diffusivities within the coal particle are measured independently.
Published Version
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