<報文>Canister法による酸化ペレット還元鉄層の有効拡散係数の測定

概要

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In order to attain a better understanding of the reduction mechanism of iron oxide, diffusive fluxes of hydrogen and water vapor through porous iron which was prepared by reducing commercial iron oxide pellets with hydrogen were measured at 920℃ by using the canister according to the device proposed by R.G.Olsson and W.M.McKewan. Furthermore, the difference in pressure inside and outside the canister was measured. As the effective diffusivity, D_e, of the porous iron reduced at 920℃, the value of 0.99cm^2/s was obtained by assuming an isobaric condition. The effect of the pressure difference on the effective diffusivities was studied by a mathematical model assuming a non-isobaric condition. As the result, it was made clear that the effective diffusivity obtained was not equal to the value under the isobaric condition. Therefore, the effective diffusivity under the isobaric condition must be measured by other methods.
東北大学の論文
1983-10-15