In this work we model and numerically analyse, the dynamics of a single species food-limited model with delay, we focus in the asymptotic behavior. We use the sub and supersolutions method to provide some numerical simulations of the asymptotic behavior for several cases, autonomous, periodic, almost periodic concluding with a model that incoporates nonlocal delays as well as a continuous delay...

The accumulation of spent carbide (YG8), not only pollutes the environment but also causes waste tungsten, cobalt and other rare metal resources. To better address this issue, we proposed a combined electrochemical separation process low-temperature aqueous solution high-temperature molten salt for tungsten cobalt. H<sub>2</sub>WO<sub>4</sub> was obtained from in an solu...

Formation of spatially periodic patterns is a ubiquitous process in nature and man-made systems. Periodic precipitation the oldest type pattern formation, which formed colloid particles are self-assembled into sequence separated zones solid hydrogels. Chemical systems exhibiting mostly comprise oppositely charged inorganic ions. Here, we present new sub-group this phenomenon driven by diffusion...

  Abstract : In this study, we prepared a LaNi0.3Al0.7O3 perovskite catalyst using a sol-gel related method (with prop ionic acid as a solvent) for use in the methane dry reforming reaction to produce synthesis gas. We defined the catalyst structure on the basis of X-ray diffraction analysis and measurements of the specific surface area and particle size distribution. The mixed oxide structure ...

Models for reacting flow are typically based on advection-diffusion-reaction (A-D-R) partial differential equations. Many practical cases correspond to situations where the relevant time-scales associated with each of the three sub-processes can be widely different, leading to disparate time-step requirements for robust and accurate timeintegration. In particular, interesting regimes in combust...

This paper is devoted to the study of the regularity of solutions to some systems of reaction– diffusion equations, with reaction terms having a subquadratic growth. We show the global boundedness and regularity of solutions, without smallness assumptions, in any dimension N . The proof is based on blow-up techniques. The natural entropy of the system plays a crucial role in the analysis. It al...

Coupling Particle-Based Reaction-Diffusion Simulations with Reservoirs Mediated by PDEs