Study of liquid behavior in an expanded bed adsorption (EBA) system is important for understanding, modeling and predicting nanobioproduct/biomolecule adsorption performance in such processes. In this work, in order to analyze the local axial dispersion parameters, simple custom NBG (Nano Biotechnology Group) expanded bed columns with 10 and 26 mm inner diameter were modified by insertion of sa...

This work presents a systematic procedure for using the general rate model to predict experimental chromatograms. The model considered axial dispersion, interfacial film mass transfer and intraparticle diffusion with parameters that have been intensively investigated in classical chemical engineering masstransfer research. Theoretical equations, mass-transfer correlations and experimental proce...

The presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. Moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. The aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coeff...

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...

Following a critical publication review on the expansion of fluidized bed with the fluid velocity, the well-known Richardson–Zaki equation is applied to develop a more accurate relationship linking the apparent drag force Fd, the effective gravitational force Fg and the voidage of fluidized beds under intermediate regime. A correcting constant a in the relationship is a function of Archimedes n...

An experimental study is conducted to determine the effect of different types of nanoparticles on the gas fluidization characteristics of nanoparticle agglomerates. Taking advantage of the extremely high porosity of the bed, optical techniques are used to visualize the flow behavior, as well as to measure the sizes of the fluidized nanoparticle agglomerates at the bed surface. Upon fluidizing 1...