Hydrodynamics and mass transfer performance of vapor–liquid flow of orthogonal wave tray column

The mass transfer performance of a string film reactor (SFR)—a bioreactor design for the aerobic bioconversion of methane—was investigated. The results showed that the SFR could achieve high mass transfer performance of gases, and the highest values of the mass transfer coefficients for oxygen and methane were 877.1 h−1 and 408.0 h−1, respectively. There were similar mass transfer coefficients for oxygen and methane in absorption experiments using air, methane, and air–methane mixed gas under the same liquid flow rate conditions, implying that each gas is delivered into the liquid without mutual interaction. The mass transfer performance of the SFR was significantly influenced by the liquid flow rate and the hydrophilicity of the string material, whereas the magnitude of the gas flow rate effect on the mass transfer performance depended on both the tested liquid flow rate and the gas flow rate. Furthermore, the mass transfer performance of the SFR was compared with those of other types of bioreactors.

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Investigation on pressure drop characteristic and mass transfer performance of gas–liquid flow in micro-channels

Microfluidics and Nanofluidics ◽

10.1007/s10404-013-1226-5 ◽

2013 ◽

Vol 16 (1-2) ◽

pp. 413-423 ◽

Cited By ~ 12

Author(s):

Xi Wang ◽

Yumei Yong ◽

Chao Yang ◽

Zai-Sha Mao ◽

Dandan Li

Keyword(s):

Mass Transfer ◽

Pressure Drop ◽

Liquid Flow ◽

Transfer Performance ◽

Micro Channels ◽

Gas Liquid Flow

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Hydrodynamics and mass-transfer characteristics analysis of vapor–liquid flow of dual-flow tray

Journal of Engineering Thermophysics ◽

10.1134/s1810232816040020 ◽

2016 ◽

Vol 25 (4) ◽

pp. 449-463 ◽

Cited By ~ 7

Author(s):

L. Zhang ◽

Z. Li ◽

N. Yang ◽

B. Jiang ◽

A. N. Pavlenko ◽

...

Keyword(s):

Mass Transfer ◽

Liquid Flow ◽

Transfer Characteristics ◽

Characteristics Analysis ◽

Vapor Liquid

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HEAT AND MASS TRANSFER PERFORMANCE RESEARCH ON MULTIEFFECT VERTICAL TUBULAR SOLAR STILLS WITH GRAVITY FEED FOR SINGLE FAMILY USE

10.1615/ihtc16.nee.024137 ◽

2018 ◽

Author(s):

ZeHui Chang ◽

Yang Liu ◽

Jianye Li ◽

Wenlong Li ◽

HongFei Zheng

Keyword(s):

Mass Transfer ◽

Heat And Mass Transfer ◽

Transfer Performance ◽

Single Family ◽

Performance Research

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

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19850745 ◽

1985 ◽

Vol 50 (3) ◽

pp. 745-757 ◽

Cited By ~ 3

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.

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Absorption of oxygen into solutions of polymers

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19862127 ◽

1986 ◽

Vol 51 (10) ◽

pp. 2127-2134 ◽

Cited By ~ 1

Author(s):

František Potůček ◽

Jiří Stejskal

Keyword(s):

Mass Transfer ◽

Aqueous Solutions ◽

Transfer Coefficient ◽

Mass Transfer Coefficient ◽

Flow Rate ◽

Liquid Flow ◽

Flow Curve ◽

Liquid Flow Rate ◽

Polymer Concentration ◽

Newtonian Liquids

Absorption of oxygen into water and aqueous solutions of poly(acrylamides) was studied in an absorber with a wetted sphere. The effects of changes in the liquid flow rate and the polymer concentration on the liquid side mass transfer coefficient were examined. The results are expressed by correlations between dimensionless criteria modified for non-Newtonian liquids whose flow curve can be described by the Ostwald-de Waele model.

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