Liquid–solid mass transfer in a two phase fluidized bed bioreactor

2008 ◽  
Vol 135 (1-2) ◽  
pp. 135-140 ◽  
Author(s):  
L. Prasanna Lakshmi ◽  
Y. Pydi Setty
Keyword(s):  
Mass Transfer ◽  
Fluidized Bed ◽  
Solid Mass ◽  
Two Phase ◽  
Fluidized Bed Bioreactor

Liquid-solid mass transfer in inverse fluidized bed

AIChE Journal ◽  
1991 ◽  
Vol 37 (5) ◽  
pp. 781-784 ◽  
Author(s):  
I. Nikov ◽  
D. Karamanev
Keyword(s):  
Mass Transfer ◽  
Fluidized Bed ◽  
Solid Mass ◽  
Inverse Fluidized Bed

scholarly journals Gas solid contacting measurements in a turbulent fluidized bed by oxidation of carbon monoxide

2019 ◽  
Vol 23 (Suppl. 5) ◽  
pp. 1413-1423
Author(s):  
Robbie Venderbosch ◽  
Wolter Prins ◽  
Swaaij van
Keyword(s):  
Mass Transfer ◽  
Fluidized Bed ◽  
Phase Model ◽  
Internal Diameter ◽  
Turbulent Regime ◽  
Dense Phase ◽  
Transfer Coefficients ◽  
Two Phase ◽  
Fluid Bed ◽  
Real Flow

The conversion rate of the mass transfer controlled oxidation of CO over a Pt/?-alumina catalyst (d = 65 ?m) has been studied in a fluidized bed (internal diameter = 0.05 m) p operated close to and in the turbulent fluid bed regime. The objectives were to investigate the gas-solids contacting efficiency to evaluate the conversion data in terms of overall mass transfer coefficients and define the apparent contact efficiency. At high superficial gas velocities, the concept of formation of particle agglomerates and voids is more realistic than the two-phase model considering discrete bubbles and a dense phase. The two-phase model is not useless but has hardly any relation with the real flow pattern in the turbulent regime.

Investigation on Complex Pressure Fluctuations in a Gas-Solids Circulating Fluidized Bed Rieser

2012 ◽  
Vol 538-541 ◽  
pp. 610-615
Author(s):  
Jun Xu ◽  
Xing Xing Chen ◽  
Gui Lei Wang ◽  
Yao Dong Wei
Keyword(s):  
Fluidized Bed ◽  
Pressure Fluctuation ◽  
Circulating Fluidized Bed ◽  
Pressure Fluctuations ◽  
Low Frequency ◽  
Axial Direction ◽  
High Amplitude ◽  
Solid Mass ◽  
Two Phase ◽  
Mass Fluxes

The experiment is carried out in a 13-meter-high circulating fluidized bed(CFB) to investigate gas-solid two-phase flow by pressure sensor. The axial pressure and pressure fluctuation are measured in different solid mass fluxes. With the solid mass flux increasing, pressure gradually increases, and pressure gradually decreases along the riser upwards. The characteristic of pressure fluctuation in the riser is analyzed, which indicates that pressure fluctuation in the riser originates from the inlet. The intensity of the pressure fluctuation decreases along the riser upwards. This pressure fluctuation is composed of two types: one is of low frequency and high amplitude, which is resulted from unstable feeding to the riser and keeps coherent along the axial direction. And the other is of high frequency and low amplitude, which is the result of a variety of factors, such as cluster movement, gas-solid interaction and gas velocity fluctuation.

Characteristics of gas–solid mass transfer in a cocurrent downflow circulating fluidized bed reactor

2007 ◽  
Vol 132 (1-3) ◽  
pp. 9-15 ◽  
Author(s):  
Baolin Luo ◽  
Dong Yan ◽  
Ying L. Ma ◽  
Shahzad Barghi ◽  
Jesse Zhu
Keyword(s):  
Mass Transfer ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Solid Mass
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