01517nab a2200205 4500 20260520000838.0 260224s2009 xxu Analysis on leaching characteristics of iron in coal fly ash under ammonia-based wet flue gas desulfurization (WFGD) conditions nov./dic. 2009 09/06/2010 ; 09/06/2010 4 p. ; 5916-5919 Transcripción del resumen del autor. Iron leaching from fly ash has been investigated under simulated ammonia-based wet flue gas desulfurization conditions to determine the effects of the reaction temperature, initial pH value, liquid/solid ratio, and vibration frequency. The experimental results indicated that the ferric ion concentration in solution increased with the increase of the temperature and vibration frequency and the decrease of the pH value and liquid/solid ratio. The kinetics of iron leaching can be expressed as diffusion combined with a surface chemical reaction model. The reaction path can be described by the equation: 1 - (1 - a)1/3 = kt. The apparent activation energy was estimated to be about 20.01 kJ/mol. Such a value of the activation energy indicates that the leaching of iron under experimental conditions is controlled by both chemical reaction and diffusion. 6 Energy & fuels 23 ARTICULO Gao, Xiang 42369 Ding, Hong-lei 42370 Wu, Zu-liang 42371 170833 170833 0 0 0 0 238652 BAAB BAAB 2026-03-05 200045687 0 200045687 2026-03-05 15:13:10 2026-03-05 ARTICULO