Pressure drop, gas holdup, and interfacial area for gas-liquid contact in Karr columns

1986 ◽  
Vol 25 (3) ◽  
pp. 660-664 ◽  
Author(s):  
N. S. Yang ◽  
Z. Q. Shen ◽  
B. H. Chen ◽  
A. F. McMillan
Keyword(s):  
Pressure Drop ◽  
Interfacial Area ◽  
Gas Holdup

Gas holdup and its relation to interfacial area in bubble-type reactors

1974 ◽  
Vol 39 (2) ◽  
pp. 528-538 ◽  
Author(s):  
F. Kaštánek ◽  
V. Nývlt ◽  
M. Rylek
Keyword(s):  
Interfacial Area ◽  
Gas Holdup

scholarly journals GAS HOLDUP AND PRESSURE DROP IN A MULTISTAGE VIBRATING DISK COLUMN WITH COCURRENT GAS-LIOUID FLOW

1974 ◽  
Vol 7 (2) ◽  
pp. 123-126 ◽  
Author(s):  
KAKUJI TOJO ◽  
KEI MIYANAMI ◽  
TAKEO YANO
Keyword(s):  
Pressure Drop ◽  
Gas Holdup

Gas holdup and pressure drop for air-water flow through plate bubble columns

1986 ◽  
Vol 64 (3) ◽  
pp. 387-392 ◽  
Author(s):  
B. H. Chen ◽  
N. S. Yang ◽  
A. F. Mcmillan
Keyword(s):  
Pressure Drop ◽  
Water Flow ◽  
Gas Holdup ◽  
Bubble Columns ◽  
Flow Through

Enhancement of Inter-Phase Transport in Mini/Micro-Scale Applications Using Passive Mixing

2011 ◽  
Author(s):  
Adam A. Donaldson ◽  
Patrick Plouffe ◽  
Arturo Macchi
Keyword(s):  
Mass Transfer ◽  
Pressure Drop ◽  
Scale Up ◽  
Interfacial Area ◽  
Flow Patterns ◽  
High Mass ◽  
Two Phase ◽  
Initial Flow ◽  
Micro Scale ◽  
Passive Mixing

Structured mini/micro-scale reactors continue to receive attention from both industry and academia due to their low pressure drop, high mass transfer rates and ease of scale-up when compared to conventional reactor technology. Commonly considered for heat and mass transfer limited reactions such as hydrogenations, hydrodesulphurization, oxidations and Fischer-Tropsch synthesis, the performance of these systems is highly dependent on mixing and the interfacial area between phases. While existing literature describes the initial flow patterns generated by a broad range of two-phase contactors, few studies explore the dynamic impacts of downstream passive mixing elements. Experimental and computational methodologies for characterizing two-phase flow pattern transitions, pressure drop, mixing and mass transfer are discussed, with relevant examples for serpentine and venturi-based passive mixing designs. The efficacy of these two configurations are explored in the context of pressure drop, conditions leading to significant interface renewal, and design considerations for optimizing mass transfer. Challenges associate with the characterization of multiphase flow through these systems are highlighted, and strategies suggested for both experimental and computational analysis of dynamic flow patterns and fluid-fluid interactions.

Modeling of Gas Holdup and Pressure Drop Using ANN for Gas-Non-Newtonian Liquid Flow in Vertical Pipe

2014 ◽  
Vol 917 ◽  
pp. 244-256 ◽  
Author(s):  
Nirjhar Bar ◽  
Sudip Kumar Das
Keyword(s):  
Pressure Drop ◽  
Liquid Flow ◽  
Multilayer Perceptron ◽  
Transfer Functions ◽  
Gas Holdup ◽  
Newtonian Liquid ◽  
Training Algorithms ◽  
Vertical Pipe ◽  
Frictional Pressure Drop ◽  
Hidden Layer

This paper is an attempt to compare the the performance of the three different Multilayer Perceptron training algorithms namely Backpropagation, Scaled Conjugate Gradient and Levenberg-Marquardt for the prediction of the gas hold up and frictional pressure drop across the vertical pipe for gas non-Newtonian liquid flow from our earlier experimental data. The Multilayer Perceptron consists of a single hidden layer. Four different transfer functions were used in the hidden layer. All three algorithms were useful to predict the gas holdup and frictional pressure drop across the vertical pipe. Statistical analysis using Chi-square test (χ2) confirms that the Backpropagation training algorithm gives the best predictability for both cases.

Interfacial Area and Gas Holdup in an Agitated Gas-Liquid Reactor under Pressure

1995 ◽  
Vol 34 (1) ◽  
pp. 59-71 ◽  
Author(s):  
Dick Stegeman ◽  
Pieter J. Ket ◽  
Harmen A. v.d. Kolk ◽  
Jeroen W. Bolk ◽  
Peter A. Knop ◽  
...  
Keyword(s):  
Interfacial Area ◽  
Gas Holdup

Characteristics of carbide slag slurry flow in a bubble column carbonation reactor

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Peng Zheng ◽  
Genfu Zhou ◽  
Weiling Li ◽  
Chuanwen Zhao ◽  
Pu Huang ◽  
...  
Keyword(s):  
Bubble Column ◽  
Reaction System ◽  
Flow Characteristics ◽  
Interfacial Area ◽  
Gas Holdup ◽  
Operation Condition ◽  
Solid Ratio ◽  
Carbide Slag ◽  
Condition Optimization ◽  
Wide Range

Abstract The direct aqueous mineral carbonation of carbide slag was investigated. The flow characteristics of carbide slag-CO2-water reaction system in a bubble column were studied, which included the bubble Sauter mean diameter, gas holdup, bubble residence time, and the gas-liquid interfacial area. Bubble flow behaviors in the reactor were characterized by analyzing the bed pressure signals. The effects of the gas velocity (U g ) and liquid to solid ratio (L/S ratio) were discussed and analyzed. The results showed that the larger bubbles were easy to form at the larger L/S ratio, which indicated that the bubble coalescence was promoted. The gas holdup was larger when increasing U g or reducing the L/S ratio. The better gas-liquid interfacial areas were found in a wide range of L/S ratio at U g  = 0.082 m/s. The optimum conditions were found at U g  = 0.082 m/s and L/S ratio = 15–30 mL/g for the better gas-liquid interfacial area and the higher carbide slag conversion. The work provided the theoretical basis for the direct aqueous carbonation of the carbide slag and the operation condition optimization.

scholarly journals Gas holdup and pressure drop in three-phase vertical flows of gas-liquid-fine solid particles system.

1986 ◽  
Vol 19 (1) ◽  
pp. 56-61 ◽  
Author(s):  
YASUO HATATE ◽  
HIROSHI NOMURA ◽  
TAKANORI FUJITA ◽  
SHUICHI TAJIRI ◽  
NOBUYUKI HIDAKA ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Gas Holdup ◽  
Solid Particles ◽  
Three Phase
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