Gas fluidization is widely used in industries and has been extensively studied either experimentally or mathematically. Recently, the coupled approach of discrete particle simulation (DPS) for solid phase and computational fluid dynamics (CFD) for gas phase has been proposed to study the heat transfer in fluidized beds at a particle level. The approach offers a convenient way to study the effec...

This work focuses on the numerical modelling and experimental validation of hydrodynamic behaviour a novel 50 kWth indirectly heated bubbling fluidized bed steam reformer. The beds with immersed vertical tubes complex geometries in general have not been thoroughly investigated terms coupled for pilot scale reactors. Therefore, present study contributes to hydrodynamics field, while investigatin...

Abstract The present study explores the relevance of physical properties biomass particles on determination minimum fluidization velocity ( U mf ) binary mixtures. Fluidization experiments were performed in a cold flow unit with diverse biomasses mixed sand different mass fractions. Gas and pressure drop across bed used to determine . Different correlations reported literature evaluated their a...

Many correlations have been proposed for bubble size in fluidized beds, mainly Geldart B particles. For particles with physical properties suitable catalyst the is significantly affected by gas properties. However, there are no that take into account effect of fluidizing gases. Reactor models necessary appropriate design and operation bed reactors, one important parameters determining mass tran...

Hydrotalcites are a promising candidate for capturing CO2, but their strong inter-particle forces produce significant agglomeration and poor fluidisation quality in micro-fluidised bed technology. Therefore, this study we performed detailed hydrodynamic experiments using the pressure drop characterisation approach to identify viable MFBR designs operating conditions these Geldart C powders. Our...

Two different modeling approaches are applied in this work to the simulation of fluidized bed reactors containing solid particles Geldart A-B type and operated at typical conditions for polyolefins production. On one side, a fully detailed computational fluid-dynamics (CFD) model is developed, considering 2D planar geometry multi-fluid description with kinetic theory granular flows. other, conv...