The transient bubble behavior was experimentally investigated to fundamentally understand the transient motion of gas bubbles in freely bubbling fluidized beds, simulating the FBC systems. Due to the oversimplified traditional two phase flow model concepts developed and most of the related numerous experimental works from 1960s to 1980s, the transient bubble behaviors could not have received du...

A large amount of fuel cell research focuses on porous gas diffusion (PGD) fuel cells which currently produce the best power density. However, this sect of fuel cell technology has many obstacles to overcome before becoming a viable large scale source or power. Nevertheless, alternatives to PGD fuel cells exist. Fluidized bed electrodes (FBE), packed bed electrodes, and packed screen electrodes...

A Fluidized Bed Metal–Organic Chemical Vapor Deposition (FB-MOCVD) process was developed for the growth of tin oxide thin films on large hollow Ni particles. Tetraethyl tin was used as tin source and dry air both as fluidization gas and oxidant reagent. The SnO2 films were grown in a FBCVD reactor under reduced pressure (13.3 kPa) in the temperature range of 633–663 K. A series of specific expe...

The fluid dynamics in the furnaces of large-scale circulating fluidized bed (CFB) boilers are surprisingly little known contrast to many laboratory studies made on conditions related chemical reactors. Two areas surveyed present work: bottom and upper dilute zone a furnace. is considered bubbling, but general opinion that either it does not exist, or turbulent. flow furnace phase transport, jud...

The fluidization behavior of silica gel was tested in a fluidized bed under different sound pressure levels and sound frequencies. It has been found that the particle mixtures can be fluidized smoothly with sound assistance at low sound frequency owing to the sound energy disrupting large size of agglomerates. The minimum fluidization velocity was found to decrease with increasing sound frequen...

Micro-fluidized bed has aroused much attention due to its low-cost, intensified-process and fast-screening properties. In this paper, a micro-fluidized (15 × 15 mm in cross-section) was designed fabricated with the use of stereolithography printing technique, for investigation bubbles’ hydrodynamics comparison solids (3D-printed particles VS fungal pellets) fluidization characteristics. liquid–...

Fluidized bed has many advantages such as high heat and mass transfer rates, temperature homogeneity and good mixing property. However, conventional fluidized bed has some limitations; operation at high gas velocity leads to slugging and there exists minimum particle size for the uniform fluidization. Recently, a rotating fluidized bed (RFB) has attracted special interest, since it has a possib...

A mathematical model for the fluidization of polydisperse suspensions is developed. The stationary concentration configurations for a given fluidizing velocity are analyzed and a mixing condition for bed inversion is derived. A central finite difference scheme is applied to the simulation of the fluidization of a bidisperse suspension. The numerical simulations agree with the experimentally rep...

Abstract According to the characteristics of marine natural gas hydrate, China has proposed solid-state fluidization exploitation technology or with subsea being key commercial recovery gas. In this paper, two new integrated tools are for breaking and collecting their working principles steps illustrated. Finite element analysis, three-dimensional modeling, simulations were conducted both verif...

Micro-fluidized bed (MFB) can be used as a fast screening tool for preliminary testing of engineering designs, but the applications MFB bioprocessing research such microorganism cultivation is still deficient. This paper reports unique fluidization performance fungal pellets in 3D-printed micro-fluidized bed, thus giving insights to hydrodynamic study and broadening potential bioproduction fiel...