Termination of AF during catheter ablation is associated with a better clinical outcome in patients with LPAF.

Deactivation of a lanthanum exchanged zeolite Y catalyst for isopropyibenzene (cumene) cracking was studied with a thermobalance. The kinetics of coke formation and the main reaction were determined. The Froment-Bischoff approach to modeling catalyst deactivation was used. The deactivation function giving the best fii to both the cracking and coking reaction data was an exponential one related to the coke content of the catalyst. The kinetic mechanism for coking that gave the best fit was one in which parallel and consecutive coking reactions occurred simultaneously. Apparently, more coke forms from products than reactants, especially at higher temperature.

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