Mass transfer in the system with instantaneous chemical reaction and interfacial turbulence extraction of acetic acid from isobutanol into aqueous solution of sodium hydroxide

1979 ◽  
Vol 44 (9) ◽  
pp. 2780-2789 ◽  
Author(s):  
Milada Řeháková ◽  
Vladimír Rod
Keyword(s):  
Aqueous Solution ◽  
Mass Transfer ◽  
Acetic Acid ◽  
Sodium Hydroxide ◽  
Chemical Reaction ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Flat Interface ◽  
Additive Term ◽  
Instantaneous Chemical Reaction

Extraction of acetic acid from isobutanol into aqueous solution of sodium hydroxide in the system with flat interface was studied. The effect of interfacial turbulence, induced by chemical reaction on the mass transfer rate of reacting components across the interface was determined independently from measurements of mass transfer rate of non-reacting solvents. The concept of enhancement factor was used for description of the phenomenon. The effect of interfacial turbulence on mass transfer rate was expressed by the additive term to the rate of energy dissipation on the interface.

scholarly journals Intensification of mass transfer with chemical reaction under conditions of concentration-capillary convection

2021 ◽  
Vol 282 ◽  
pp. 07005
Author(s):  
S.A. Ermakov ◽  
A.A. Ermakov ◽  
A.V. Mankov ◽  
Yu.R. Muratov ◽  
A.E. Koparulina
Keyword(s):  
Aqueous Solution ◽  
Mass Transfer ◽  
Carbon Tetrachloride ◽  
Sodium Hydroxide ◽  
Chemical Reaction ◽  
Butyric Acid ◽  
Solid Medium ◽  
Dispersed Phase ◽  
Transfer Unit

The regularities of mass transfer with a chemical reaction in the system of aqueous solution of sodium hydroxide (solid medium) / butyric acid (transportable component) / carbon tetrachloride (dispersed phase) in spray extractors are studied. It is shown that the resulting chemocapillary instability can significantly reduce the height of the transfer unit. The conditions for the occurrence of spontaneous concentration-capillary convection during mass transfer with a chemical reaction under conditions of constrained drop movement are determined.

Local Measurement of Mass Transfer Rate of a Single Bubble with and without a Chemical Reaction

2012 ◽  
Vol 45 ◽  
pp. 708-712 ◽  
Author(s):  
Ulf Daniel K^|^uuml;ck ◽  
Michael Schl^|^uuml;ter ◽  
Norbert R^|^auml;biger
Keyword(s):  
Mass Transfer ◽  
Chemical Reaction ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Single Bubble ◽  
Local Measurement

scholarly journals Slip Effects on MHD Squeezing Flow of Jeffrey Nanofluid in Horizontal Channel with Chemical Reaction

Mathematics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1215
Author(s):  
Nur Azlina Mat Noor ◽  
Sharidan Shafie ◽  
Mohd Ariff Admon
Keyword(s):  
Mass Transfer ◽  
Brownian Motion ◽  
Differential Equations ◽  
Viscous Dissipation ◽  
Chemical Reaction ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Squeeze Flow ◽  
Squeezing Flow ◽  
Jeffrey Nanofluid

The heat and mass transfer characteristics on hydromagnetic squeeze flow of Jeffrey nanofluid between two plates over a permeable medium by slip condition with the influences of viscous dissipation and chemical reaction is examined. Buongiorno’s nanofluid model, which includes Brownian motion and thermophoresis impacts, is implemented in this research. The governing nonlinear partial differential equations are transformed to the nonlinear ordinary differential equations via asimilarity transformation. The transformed equations are solved by employing numerical techniques of Keller-box. A comparison of the skin friction coefficient, Nusselt and Sherwood numbers with reported outputs in the journals are carried out to validate the present outputs. An excellent agreement is found. The results show that the squeezing of plates accelerates the velocity and wall shear stress. Furthermore, the velocity, temperature and concentration profile decrease when the Hartmann number and ratio of relaxation and retardation times increases. The raise in thermophoresis and viscous dissipation elevate the temperature profile and the heat transfer rate. Furthermore, the mass transfer rate declines due to the strong Brownian motion in the nanofluid, whereas it increases with the addition of chemical reaction and thermophoresis.

scholarly journals Dual solutions for unsteady flow of Powell-Eyring fluid past an inclined stretching sheet

2016 ◽  
Vol 13 (1) ◽  
pp. 89-99 ◽  
Author(s):  
P. M. Krishna ◽  
N. Sandeep ◽  
J. V. R. Reddy ◽  
V. Sugunamma
Keyword(s):  
Mass Transfer ◽  
Unsteady Flow ◽  
Friction Factor ◽  
Heat And Mass Transfer ◽  
Chemical Reaction ◽  
Transfer Rate ◽  
Stretching Sheet ◽  
Mass Transfer Rate ◽  
Dual Solutions ◽  
Source Sink

This paper deals with the heat and mass transfer in unsteady flow of Powell-Eyring fluid past an inclined stretching sheet in the presence of radiation, non-uniform heat source/sink and chemical reaction with suction/injection effects. The governing equations are reduced into system of ordinary differential equations using similarity transformation and solved numerically using Runge-Kutta based shooting technique. Results display the influence of governing parameters on the flow, heat and mass transfer, friction factor, local Nusselt and Sherwood numbers. Comparisons are made with the existed studies. Present results have an excellent agreement with the existed studies. Results indicate that an increase in the chemical reaction parameter depreciates the friction factor, heat transfer rate and enhances the mass transfer rate. Dual solutions exist only for certain range of suction/injection parameters.

Hydrogen Recovery from Organic Wastes: Reactor Development and Improvement

2010 ◽  
Vol 113-116 ◽  
pp. 1040-1044
Author(s):  
Zi Rui Guo ◽  
Yi Sun ◽  
Li Ran Yue ◽  
Yong Feng Li
Keyword(s):  
Mass Transfer ◽  
Acetic Acid ◽  
Interfacial Layer ◽  
Transfer Rate ◽  
Feedback Inhibition ◽  
Anaerobic Fermentation ◽  
Mass Transfer Rate ◽  
Target Product ◽  
Two Phase ◽  
Hydrogen Recovery

The paper reviewed hydrogen production biotechnology on reactor development and design aspects. Biological hydrogen-producing reactor as acid-producing phase of two-phase anaerobic organism treatment system plays an important role in the following aspects: Reactor was developed as the follow ideas: a. CSTR-type anaerobic fermentation reactor is selected to reduce the substrate concentration in reactor and increase target product operational yield and selectivity in the reactor; b. mixture liquid in reaction area is stirred by the stirrer to reach a turbulent state in order to reduce interfacial layer thickness and temperature gradient in a floc unit particle and increase mass transfer rate; c. H2 in the particle and Liquid phase is accelerated to release to prevent accumulated H2 from bringing feedback inhibition to organism metabolism, and H2/CO2conversion to acetic acid; d. A sector turbine agitator with hoisting capacity and mixing power is selected to facilitate sludge to flow back through a effluence seam.

scholarly journals Mixed Convective Conditions on Natural Convection of MHD Blasius and Sakiadis Flows with Variable Properties and Nonlinear Chemical Reaction

2020 ◽  
Vol 11 (2) ◽  
pp. 8854-8874
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Friction Factor ◽  
Chemical Reaction ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Moving Plate ◽  
Transfer Rates ◽  
Blasius Flow ◽  
Sakiadis Flow

An unsteady two-dimensional boundary layer slip flow of a viscous incompressible fluid moving plate in a quiescent fluid (Sakiadis flow) and the flow-induced over a stationary flat plate by a uniform free stream (Blasius flow) are investigated simultaneously, from a numerical point of view. The variable thermal conductivity, viscosity ratio parameter, and nonlinear chemical reaction are used in the governing equations. Similarity equations of the governing transport equations are converted into an ordinary differential equation. The transformed equations are solved numerically using the Runge-Kutta method via the shooting technique. Sample results for the dimensionless velocity, temperature, and concentration distributions are studied through graphically. Moreover, friction factor, heat, and mass transfer rates have been discussed in detail. The chemical reaction parameter decelerates the friction factor and heat transfer rates for the Sakiadis and Blasius flow cases and enhances in mass transfer rate in both cases. The rate of mass transfer is higher in Blasius flow compared with Sakiadis flow. The present results of the heat transfer rate are compared with the published results are found to be in good agreement.

scholarly journals 3D flow of Carreau polymer fluid over variable thickness sheet in a suspension of microorganisms with Cattaneo-Christov heat flux

2018 ◽  
Vol 64 (5) ◽  
pp. 519 ◽  
Author(s):  
P. Durga Prasad ◽  
S. V. K. Varma ◽  
C.S.K. Raju ◽  
Sabir Ali Shehzad ◽  
M.A. Meraj
Keyword(s):  
Mass Transfer ◽  
Chemical Reaction ◽  
Variable Thickness ◽  
Heat Sink ◽  
Transfer Rate ◽  
Liquid Velocity ◽  
Numerical Study ◽  
Source Parameters ◽  
Mass Transfer Rate ◽  
Thickness Sheet

Numerical study of three dimensional Carreau liquid flow with heat and mass transport features over a variable thickness sheet filled with microorganisms is analyzed. We considered the non-uniform heat sink or source and multiple slip effects. The governing non-linear partially differential expressions are developed into ordinary differential systems by using variable transformations. These expressions are solved numerically by using Runge-Kutta fourth order method connected with shooting methodology. A Parametric study is implemented to demonstrate the effects of Hartmann number, Prandtl number, Weissenberg number, Peclet number, chemical reaction and heat sink/source parameters on liquid velocity, temperature and concentration profiles. The quantities of physical interest are described within the boundary layer. From this analysis, we found that the magnetic parameter decrease the local Sherwood and local Nusselt numbers for both and cases. The constraint of chemical reaction enhances the mass transfer rate and decelerates the density of motile mass transfer rate. The space dependent and temperature dependent heat source/sink suppress the local Nusselt number.

scholarly journals Unsteady nano-bioconvective channel flow with effect of nth order chemical reaction

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 1011-1024 ◽  
Author(s):  
Md Faisal Md Basir ◽  
Kohilavani Naganthran ◽  
Ehtsham Azhar ◽  
Zaffar Mehmood ◽  
Swati Mukhopadhyay ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Mass Transfer ◽  
Channel Flow ◽  
Chemical Reaction ◽  
Transfer Rate ◽  
Mass Transfer Rate ◽  
Lower Wall ◽  
Layer System ◽  
Boundary Layer Equations ◽  
Order Chemical Reaction

Abstract Nanofluid bioconvective channel flow is an essential aspect of the recent healthcare industry applications, such as biomedical processing systems. Thus, the present work examined the influence of nth order chemical reaction in an unsteady nanofluid bioconvective channel flow in a horizontal microchannel with expanding/contracting walls. The suitable form of the similarity transformation is exercised to transform the governing boundary layer equations into a more straightforward form of system to ease the computation process. The Runge–Kutta method of fifth-order integration technique solved the reduced boundary layer system and generated the numerical results as the governing parameters vary. It is found that the destructive second-order chemical reaction enhances the mass transfer rate at the lower wall but deteriorates the mass transfer rate at the upper wall. The upper channel wall has a better heat transfer rate than the lower wall when the Reynolds number increases.

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