Liquid–solid fluidized beds have a wide range of applications in metallurgical processing, mineral extraction, and wastewater treatment. Great interest on their flow stability heterogeneous fluidization behaviors has been aroused research. In this study, various experiments were performed by adjusting the operating conditions particle size, density, liquid superficial velocity. For each case, s...

The main advantage of a fluidized bed is its capability in excellent gas-fuel mixing. However, due to the lacks of gas radial momentum, its lateral mixing of gas-solid is not adequate. Therefore, this research is focused on fluidized bed hydrodynamics enhancement using the modified gas distributor plate design. For getting an optimum fluidized bed hydrodynamics prediction, three different class...

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...

The conditions to improve performance of quartz tube silicon carbide (SiC) solid particle fluidized bed solar receiver was investigated with computational fluid dynamics (CFD) simulations. difficulty experimenting all possible operating overcome by preparing CFD base input appropriate models and parameters. amount SiC in the bed, size particles, air inlet velocity were considered as variables. ...

To enable the mechanistic description of mixing larger particles in gas-fluidized beds models (e.g. fuel combustors), knowledge about rheology bed emulsion is required. Here, it crucial to determine drag on large fuel-alike particles. This work presents experimental fate 13 different solid spheres falling or rising through a air and glass beads at minimum fluidization. The trajectories tracer a...

The uniform horizontal distribution of volatiles over the cross section a fluidized bed with purpose to obtain good contact between and materials is key issue improve gas conversion in fuel reactor chemical looping combustion solid fuels. effectiveness volatile distributor (VD) concept on lateral has been investigated under different operational conditions using cold-flow model. Furthermore, pe...

The present work is focused on the study of fluidization behaviour of biomass and sand mixtures in a laboratory scale test set up. The biomass materials used during the experimentation were rice husk, bagasse and sawdust. Two different particle sizes of silica sands were used in forming the mixture. The percentages of biomass in the mixtures were 2%, 5%, 10% and 15% by weight. The minimum fluid...

With the development of economy and industry, consumption fossil energy is gradually increasing. Currently, natural gas hydrates (NGH) are considered to be an ideal alternative due its large reserve high density. However, separation hydrate slurry a critical step in exploitation NGH. In this study, optimization structural parameters based on conventional three-phase hydrocyclone was carried out...