Diffusion of Silver Ions in Zeolite Y Preceded by a Coupled Chemical Reaction: Electrochemical Observation and Modeling

摘要: It is the goal of this work to show that complex chronoamperometry partially silver ion exchanged Ag3.1Na52.9Y can be understood by treating passage cations electrode solution interface as a diffusion-controlled reaction preceded feeding chemical step. This achieved via CE (chemical followed electrochemical) process using simulation methods adopting finite difference approach whereupon zeolite divided into set discrete volume elements corresponding large and small channels Y. The fit with experimentally recorded monograin Ag3.1Na52.9Y-modified covers 30 s after application pulse. Using approach, accurate determinations intrazeolite diffusion coefficients will possible only when exact equilibrium cation locations are known.