J. Szekely

TL;DR: In this paper, an alternative representation is proposed by describing the progress of the reaction in terms of the porosity, grain size, gas phase and solid state diffusivities and a heterogeneous reaction rate constant, which is now independent of structure.

TL;DR: In this paper, a general structural model is developed for the description of non-catalytic gas-solid reactions; which allows for spherical and flat plate like pellets, made up of spherical or flat plate-like grains.

TL;DR: In this article, a structural model is presented for the non-catalytic reaction between a porous solid and a gas stream, which incoporates parameters such as solid grain size, porosity, effective pore diffusion coefficient and allows the quantitative assessment of the role played by these in determining the overall reaction rate.

TL;DR: In this article, the reduction of porous nickel-oxide pellets with hydrogen within the temperature range 224 −412°C was investigated using a previously published model for gas-solid reactions.

TL;DR: In this paper, a formulation and computed results for the growth of a spherical gas bubble in a supersaturated liquid, due to solute diffusion, are presented in a dimensionless form and the appropriate dimensionless parameters allow a more general representation of the effects of surface tension, viscosity and liquid inertia.