Modelling of kinetics, mass transfer and flow pattern on open foam structures in tubular reactors: Hydrogenation of arabinose and galactose on ruthenium catalyst

2021 ◽  
Vol 233 ◽  
pp. 116385
Author(s):  
Ali Najarnezhadmashhadi ◽  
Johan Wärnå ◽  
Kari Eränen ◽  
Heather L. Trajano ◽  
Dmitry Murzin ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Flow Pattern ◽  
Ruthenium Catalyst ◽  
Tubular Reactors

Mass Transfer From a Rotating Cone in Axisymmetric Flow

1965 ◽  
Vol 87 (4) ◽  
pp. 469-476 ◽  
Author(s):  
F. Salzberg ◽  
S. P. Kezios
Keyword(s):  
Mass Transfer ◽  
Flow Pattern ◽  
Axisymmetric Flow ◽  
Tangential Velocity ◽  
Local Velocity ◽  
Dimensionless Form ◽  
Transfer Rates ◽  
Resultant Velocity ◽  
Local Mass Transfer ◽  
Rotating Cone

The mass-transfer by sublimation from the surface of a stationary or rotating naphthalene cone oriented axisymmetrically in an airstream is experimentally investigated. The cone employed has a 30-deg total included angle and is five in. long. Air velocities ranged up to about 50 ft/sec whereas the ratio of the tangential velocity of the conical surface (at its base) to the mainstream speed ranged up to about 7.2; for the stationary cone air speeds up to about 100 ft/sec were employed. Local mass-transfer rates are determined by measuring the depth of the sublimed naphthalene. Results are correlated in dimensionless form using either the distance along the surface and the local velocity or the spiral length and resultant velocity. The flow pattern about the stationary and rotating cone is photographed using the smoke-filament technique.

Flow pattern and mass transfer characteristics of valve tray in absorption process

2015 ◽  
Author(s):  
Siti Nurkhamidah ◽  
Ali Altway ◽  
Ayu Savitri Wulansari ◽  
Evi Fitriyah Khanifah
Keyword(s):  
Mass Transfer ◽  
Flow Pattern ◽  
Absorption Process ◽  
Valve Tray ◽  
Transfer Characteristics

scholarly journals Computational modeling of drug separation from aqueous solutions using octanol organic solution in membranes

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mahboubeh Pishnamazi ◽  
Ali Taghvaie Nakhjiri ◽  
Arezoo Sodagar Taleghani ◽  
Mahdi Ghadiri ◽  
Azam Marjani ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Flow Pattern ◽  
Process Parameters ◽  
Flow Rate ◽  
Fluid Dynamic ◽  
Mechanistic Model ◽  
Membrane System ◽  
Membrane Properties ◽  
Feed Flow Rate ◽  
Aqueous Feed

Abstract Continuous membrane separation of pharmaceuticals from an aqueous feed was studied theoretically by development of high-performance mechanistic model. The model was developed based on mass and momentum transfer to predict separation and removal of ibuprofen (IP) and its metabolite compound, i.e. 4-isobutylacetophenone (4-IBAP) from aqueous solution. The modeling study was carried out for a membrane contactor considering mass transport of solute from feed to organic solvent (octanol solution). The solute experiences different mass transfer resistances during the removal in membrane system which were all taken into account in the modeling. The model’s equations were solved using computational fluid dynamic technique, and the simulations were carried out to understand the effect of process parameters, flow pattern, and membrane properties on the removal of both solutes. The simulation results indicated that IP and 4-IBAP can be effectively removed from aqueous feed by adjusting the process parameters and flow pattern. More removal was obtained when the feed flows in the shell side of membrane system due to improving mass transfer. Also, feed flow rate was indicated to be the most affecting process parameter, and the highest solute removal was obtained at the lowest feed flow rate.

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