TY - JOUR AU - Chernenko, O. S. AU - Kalinchak, V. V. AU - Baturina, A. P. PY - 2020/08/26 Y2 - 2024/03/29 TI - Evaluation of the Porosity of a Coke Particle According to Its Combustion Data JF - Ukrainian Journal of Physics JA - Ukr. J. Phys. VL - 65 IS - 9 SE - Surface physics DO - 10.15407/ujpe65.9.823 UR - https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2020035 SP - 823 AB - <p>The dependence of the density of a porous coke particle on its diameter at the particle combustion in the external diffusion mode is analyzed. It is shown that, for the large values of the internal diffusion-kinetic ratio, Se<sub>v</sub> &gt; 5, the required dependence can be obtained in the analytic form. The analytic formulas are found to be different for the bulk and Knudsen diffusion modes inside the pores. A graphical comparison of the obtained dependences with the empirical power-law dependence is carried out to evaluate the power exponents in the analytic dependences. The corresponding results make it possible to evaluate the effective specific surface area of the pores.</p> ER -