scholarly journals Designed porous milli-scale reactors with enhanced interfacial mass transfer in two-phase flows

2017 ◽  
Vol 2 (2) ◽  
pp. 137-148 ◽  
Author(s):  
Aditi Potdar ◽  
Lidia N. Protasova ◽  
Leen Thomassen ◽  
Simon Kuhn
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Packed Bed ◽  
Transfer Performance ◽  
Two Phase Flows ◽  
Two Phase ◽  
Reduced Pressure ◽  
Packed Bed Reactors ◽  
Interfacial Mass Transfer

Designed porous milli-scale reactors with enhanced mass transfer performance and reduced pressure drop compared to conventional packed bed reactors.

scholarly journals Experimental Evaluation of Sulfur Dioxide Absorption in Water Using Structured Packing

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Rosa-Hilda Chavez ◽  
Nicolas Flores-Alamo ◽  
Javier de J. Guadarrama
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Nuclear Research ◽  
Packed Bed ◽  
Performance Model ◽  
Two Phase ◽  
Average Deviation ◽  
Absorption Column ◽  
Structured Packing ◽  
Transfer Unit

An experimental study of hydrodynamic and mass transfer processes was carried out in an absorption column of 0.252 m diameter and 3.5 m of packed bed height developed by Mexican National Institute of Nuclear Research (ININby its acronym in Spanish) of stainless steel gauze corrugated sheet packing by means of SO2-air-water systems. The experiments results include pressure drop, flows capacity, liquid hold-up, SO2composition, and global mass transfer coefficient and mass transfer unit height by mass transfer generalized performance model in order to know the relationship between two-phase countercurrent flow and the geometry of packed bed. Experimental results at loading regimen are reported as well as model predictions. The average deviation between the measured values and the predicted values is±5% of 48-data-point absorption test. The development of structured packing has allowed greater efficiency of absorption and lower pressure drop to reduce energy consumption. In practice, the designs of equipment containing structured packings are based on approximations of manufacturer recommendations.

scholarly journals Numerical investigation of interfacial mass transfer in two phase flows using the VOF method

2015 ◽  
Vol 10 (1) ◽  
pp. 100-110 ◽  
Author(s):  
Furkan Özkan ◽  
Achim Wenka ◽  
Edgar Hansjosten ◽  
Peter Pfeifer ◽  
Bettina Kraushaar-Czarnetzki
Keyword(s):  
Mass Transfer ◽  
Numerical Investigation ◽  
Vof Method ◽  
Two Phase Flows ◽  
Two Phase ◽  
Interfacial Mass Transfer

scholarly journals Design of 3D-printed structures for improved mass transfer and pressure drop in packed-bed reactors

2021 ◽  
pp. 129762
Author(s):  
Lucas Chatre ◽  
Joseph Socci ◽  
Samuel J. Adams ◽  
Petr Denissenko ◽  
Nikolay Cherkasov
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Packed Bed ◽  
Packed Bed Reactors ◽  
3D Printed

The effect of two-phase flow regime on hydrodynamics and mass transfer in a horizontal-tube gas-liquid reactor

1985 ◽  
Vol 50 (3) ◽  
pp. 745-757 ◽  
Author(s):  
Andreas Zahn ◽  
Lothar Ebner ◽  
Kurt Winkler ◽  
Jan Kratochvíl ◽  
Jindřich Zahradník
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Flow Regime ◽  
Liquid Flow ◽  
Horizontal Tube ◽  
Liquid Holdup ◽  
Two Phase ◽  
Flow Rates ◽  
Type Relation ◽  
Good Agreement

The effect of two-phase flow regime on decisive hydrodynamic and mass transfer characteristics of horizontal-tube gas-liquid reactors (pressure drop, liquid holdup, kLaL) was determined in a cocurrent-flow experimental unit of the length 4.15 m and diameter 0.05 m with air-water system. An adjustable-height weir was installed in the separation chamber at the reactor outlet to simulate the effect of internal baffles on reactor hydrodynamics. Flow regime maps were developed in the whole range of experimental gas and liquid flow rates both for the weirless arrangement and for the weir height 0.05 m, the former being in good agreement with flow-pattern boundaries presented by Mandhane. In the whole range of experi-mental conditions pressure drop data could be well correlated as a function of gas and liquid flow rates by an empirical exponential-type relation with specific sets of coefficients obtained for individual flow regimes from experimental data. Good agreement was observed between values of pressure drop obtained for weirless arrangement and data calculated from the Lockhart-Martinelli correlation while the contribution of weir to the overall pressure drop was well described by a relation proposed for the pressure loss in closed-end tubes. In the region of negligible weir influence values of liquid holdup were again succesfully correlated by the Lockhart-Martinelli relation while the dependence of liquid holdup data on gas and liquid flow rates obtained under conditions of significant weir effect (i.e. at low flow rates of both phases) could be well described by an empirical exponential-type relation. Results of preliminary kLaL measurements confirmed the decisive effect of the rate of energy dissipation on the intensity of interfacial mass transfer in gas-liquid dispersions.

Mass Transfer of Alkanes in Zeolite Packed-Bed Reactors Studied with Positron Emission Profiling (PEP). 1. Experiments

1998 ◽  
Vol 37 (3) ◽  
pp. 815-824 ◽  
Author(s):  
Bruce G. Anderson ◽  
Frank J. M. M. de Gauw ◽  
Niels J. Noordhoek ◽  
Leo J. van IJzendoorn ◽  
Rutger A. van Santen ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Packed Bed ◽  
Packed Bed Reactors ◽  
Positron Emission ◽  
Positron Emission Profiling
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