A New Source of Reaction - Diffusion Coupling in Confined Systems due to Temperature Inhomogeneity

Details A New Source of Reaction - Diffusion Coupling in Confined Systems due to Temperature Inhomogeneity A New Source of Reaction - Diffusion Coupling in Confined Systems due to Temperature Inhomogeneity

2002-02-27

arxiv.org/abs/cond-mat/0202511v1

Physics

Condensed Matter

Statistical Mechanics

to be published in Phys. Rev. Lett

Scientific paper

Diffusion is often accompanied by a reaction or sorption which can induce temperature inhomogeneities. Monte Carlo simulations of Lennard-Jones atoms in zeolite NaCaA are reported with a hot zone presumed to be created by a reaction. Our simulations show that localised hot regions can alter both the kinetic and transport properties. Further, enhancement of the diffusion constant is greater for larger barrier height, a surprising result of considerable significance to many chemical and biological processes. We find an unanticipated coupling between reaction and diffusion due to the presence of hot zone in addition to that which normally exists via concentration.

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