熔融鉄炭素合金の脱炭反應に関する研究 (III) : 脱炭速度恒数の濃度依存について

概要

論文の詳細を見る
For studying the relation of the specific rate constant and the concentrations of carbon and oxygen in reactants, the rate of the carbon removal in molten Fe-C alloys containing about 4∿0.2% carbon was measured by oxygen gas stream which had previously been prepared to have constant partial pressures of 20, 150, 300mmHg respectively by mixing pure oxygen (or nitrogen) into air. Then the specific rate constant k_0 was estimated at a given concentration of carbon according to the process used in the preceeding reports. If the reactants combined together to form the activated complex according to the following equation, [O]+[C]⇌[CO〓]⟶CO the specific rate constant k_0 might be given by the expression. k_0=k_0^1 γoγc/(γco^〓) where differcnt γ terms represented the activity coefficients of the reactants and the activated complex respectively. If the activity coefficient was defined with respect to the infinitely dilute solution as the standard state, k_0^1 was the specific rate constant at the infinite dilute solution of the reactants. From the ratio of k_0 to k_0^1, which was obtained by extrapolating at the zero concentration of carbon, γoγc/γco^〓=f term in the above equation was estimated. Although the rate of the carbon removal increased with the carbon concentration at a given oxygen pressure, k_0 increased with the diminution of carbon, in consequence of which it was found that f term was independent of the oxygen pressure at a given carbon concentration and increased with the diminution of the carbon concentration at the partial pressure between 20∿300mmHg. These results might be considered to indicate that the activity coefficient of the reactants at the interface varied with the carbon concentrations on the existence of oxygen. Nitrogen gas which existed together with oxygen gas had no influence on these terms.
社団法人日本鉄鋼協会の論文
1955-04-01

熔融鉄炭素合金の脱炭反應に関する研究 (III) : 脱炭速度恒数の濃度依存について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク