Measurement of Effective Diffusivity for CO–CO₂ Gas Mixture in Hot Briquetting Carbon Composite Iron Ore by Wicke–Kallenbach Method

Abstract

Effective diffusivity for CO–CO₂ gas mixture in Hot Briquetting Carbon Composite Iron Ore (CCB) at a temperature range of room temperature to 673 K was measured by Wicke–Kallenbach Method. The results obtained are summarized as follows;
(1) Effective diffusivity of CO–CO₂ gas mixture through CCB increased with increasing temperature and fractional reaction of CCB. The effective diffusivity for CO–CO₂ system in CCB was proportional to the 1.50 power of temperature.
(2) Kundsen diffusion and surface diffusion are negligible in regard to diffusions of CO and CO₂ in CO–CO₂ gas mixture in CCB. Therefore, diffusions of CO and CO₂ in CO–CO₂ gas mixture in CCB are described by molecular diffusion.