Kinetic study on regeneration of Fe(II)EDTA in the wet process of NO removal

作者：Wu Zhong Biao; Wang Li; Zhao Wei Rong^*

来源：Chemical Engineering Journal, 2008, 140(1-3): 130-135.

DOI：10.1016/j.cej.2007.09.025

• nitric oxide
• reversibility
• direct electrochemical regeneration
• activation energy

Cyclic voltammetry, quasi-steady-state polarization curves and potentiostatic step method were applied to study the regeneration of Fe(II)EDTA in the wet process of NO removal. The results showed that the Fe(III)EDTA reduction was a fast reversible process with one electron transferred on Pt electrode surface. Standard rate constant k(0) of Fe(III)EDTA reduction at 298 K was found to be 0.0263 cm s(-1). According to the calculated diffusion activation energy of 24.93 kJ mol(-1), apparent activation energy of 25.74 kJ mol(-1) and the electron transfer activation energy of 16.56 kJ mol(-1), the rate-determining step for Fe(III)EDTA reduction was diffusion step. Potentiostatic electrolysis tests revealed that direct electrochemical regeneration of Fe(II)EDTA in the wet process of NO removal was a promising method because of its high efficiency.

• 出版日期2008-7-1
• 单位浙江大学