海波体系中还原铁粉置换还原银的两相反应动力学研究

针对海波定影液体系中还原铁粉置换还原银,并生成致密产物层的液、固两相反应,建立了更一般情形的动力学方程,并给出其精确解。方程中Piling因子非限定,且定影液银浓度和还原铁粉几何面积随时间变化。应用此动力学方程处理液、固两相反应,比以往研究中的动力学方程更加准确、合理。该方程在原则上也适用于气、固两相反应。

Kinetic research of two-phase reaction on replacement of silver with reduced iron powder in hypo solution

Aiming at the liquid-solid two-phase reaction in hypo solution in which silver is replaced by reduced iron powder and compact layer is produced, a general kinetic equation was established and solved. In this equation, the silver density of fixer and geometric area of reduced iron powder change over time, and Philip factor is not restricted. It is more accurate and reasonable to use this kinetic equation to deal with liquid-solid two-phase reaction than methods in previous research. This equation could also be applied in gas-solid reaction.