DYNAMIC EFFECTIVE DIFFUSIVSTY WHEN APPLIED TO THE PRESSURE INCREASE DURING REACTION FOR MULTICOMPONENT GASEOUS SYSTEMS WITHIN A POROUS SOLID
Open Access
- 1 January 1975
- journal article
- Published by Taylor & Francis in JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
- Vol. 8 (5) , 374-378
- https://doi.org/10.1252/jcej.8.374
Abstract
α-Hematite powder of 8.1 μm in average diameter was packed in a quartz tube and was reduced by feeding pure hydrogen toward the upper surface of the packed bed at 900°C and the pressure increase within the bed was measured. Midway through the reduction, hydrogen-inert gas mixtures were fed instead of pure hydrogen and the variation of the pressure increase ΔP within the bed with increasing mole fraction of inert gas in feed gas, xI, 0, was investigated. Nitrogen, argon, and helium were used as the inert gas and it was found that the relationship between ΔP and xI, a varied with each inert gas. To interpret those phenomena, the concept of the multicomponent dynamic effective diffusivity is proposed. It will make the nonisobaric analysis of solid-multicomponent gas reactions possible.Keywords
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