Process optimization of multiphase chemical and/or photochemical reactor means a challenge not only at laboratory scale but also while scaling-up is intended towards industrial applications. Using computational tools, such as Computational Fluid Dynamics, essential to assess transport limitations the heterogeneous process verify kinetic regime reaction and engineering are studied. together with...

In the past, the two major biomineralization motifs, biosilicification and biocalcification, were considered as two discrete processes. However, there is increasing evidence of the existence of an inextricable relationship between biosilica and calcium-based biominerals. The recent discovery of a unique silica–chitin–aragonite biocomposite in one genus of demosponges (Verongida) introduces a no...

We propose a numerical methodology to combine detailed microkinetic modeling and Eulerian-Eulerian methods for the simulation of industrial fluidized bed reactors. An operator splitting-based approach has been applied solve kinetics coupled with solution multiphase gas-solid flows. Lab reactor configurations are simulated assess capability accuracy method by using oxidative coupling methane as ...

The gas–liquid vortex reactor (GLVR) has substantial process intensification potential for multiphase processes. Essential in this respect is the micromixing efficiency, which of great importance fast reaction systems such as crystallization, polymerization, and synthesis nanomaterials. By creating a flow taking advantage centrifugal force field, liquid can be intensified GLVR. Results show tha...

Multiphase machines have been recognized in the last few years like an attractive alterna‐ tive to conventional three-phase ones. This is due to their usefulness in a niche of applica‐ tions where the reduction in the total power per phase and, mainly, the high overall system reliability and the ability of using the multiphase machine in faulty conditions are required. Electric vehicle and rail...

Biomass chemical looping gasification (BCLG) is a complex process for the conversion of biomass using an oxygen carrier, which influenced by various operating parameters. For better understanding this process, steam ilmenite as carrier numerically investigated in work multiphase particle-in-cell (MP-PIC) method, modified Euler–Lagrange approach. As first step, reduced reaction network spouted b...

In this paper, three-dimensional (3D) multi-relaxation time (MRT) lattice-Boltzmann (LB) models for multiphase flow are presented. In contrast to the Bhatnagar-GrossKrook (BGK) model, a widely employed kinetic model, in MRT models the rates of relaxation processes owing to collisions of particle populations may be independently adjusted. As a result, the MRT models offer a significant improveme...

The use of downer reactors (gas-solid co-current downward flow) in the Fluid Catalytic cracking (FCC) process for upgrading heavy crude oil into more valuable products has gradually become common last decades. This kind reactor is characterized by having homogeneous axial and radial flow structures, no back mixing, shorter residence times as compared with riser type. Although were introduced a ...

In recent years, multiphase PWMs have been proposed because of their increased efficiency, reduced torque pulsation, improved fault tolerance, and lower power handling requirement by adopting multiphase machines. In the digital implementation, multiphase reference voltages are sampled and fed into the digital modulator to produce gating signals at a constant clock rate f. This means a finite pu...