Self-organized network of chemical reactions: A model of contaminated converging and diverging flows in fractured media

Article Abstract:

A self-organized 'tipping bucket model' of driven flow in fractured media was employed to study the degradation of contaminant by a dynamic population of traps representing microbial activity in the subsurface. It is found that an order-of-magnitude increase in the degradation rate of the individual, dynamic traps in the flow translated into much smaller increases in the overall reduction of contaminant concentration in the exiting flow.

Halocarbons, Chemical properties

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Diffusion-controlled solid-state reactions of spherical particles, A general model for multiphase binary systems

Article Abstract:

The formal treatment of the diffusion-controlled growth of n binary compounds with narrow homogeneity range during the reaction of a sphere of reactant A immersed in reactant B is presented and discussed. The results for the formation of two and three compounds are presented and the influence of the initial radius of the sphere, of the relative magnitude of the kinetic constants, and of the volume variation is discussed.

Diffusion bonding (Metals)

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Thermodynamic analysis and thermodynamic efficiency of chemical reactors

Article Abstract:

The irreversibility of a process that determines the thermodynamically realizable area in its state space is described. The condition for a process to operate at minimal dissipation can be used to construct an automatic control system that maintains the minimal dissipation of a process when external conditions change.

Thermodynamics

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