Topic
Mass transfer coefficient
About: Mass transfer coefficient is a research topic. Over the lifetime, 7827 publications have been published within this topic receiving 168354 citations.
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TL;DR: In this article, experiments were conducted to determine the absorption rates of refrigerant vapour in an aqueous lithium bromide flat-fan sheet for use in absorption air-conditioning systems.
48 citations
TL;DR: In this paper, mass transfer coefficients at the interface bulk/biofilm two biofilm systems with autotrophic and heterotrophic microbes were investigated with oxygen microelectrodes over a longterm period (1 year).
48 citations
TL;DR: In this paper, a laser-induced fluorescence (LIF) technique was used to measure the dissolved oxygen (DO) concentration through oxygen quenching of the fluorescence from dissolved pyrene butyric acid (PBA).
Abstract: Oxygen transfer across unsheared flat and wavy air−water interfaces is studied using a laser-induced fluorescence (LIF) technique. The LIF technique measures the dissolved oxygen (DO) concentration through oxygen quenching of the fluorescence from dissolved pyrene butyric acid (PBA). Fluorescence intensities in a two-dimensional plane in the water near the interface are imaged (instantaneously) with a high-resolution CCD camera. A series of image-processing and image-analysis steps corrects the intensities for variations in the fluorescence attributed to factors other than oxygen quenching and transforms the corrected fluorescence intensities into spatial measurements of the DO concentration. Near-interface vertical oxygen concentration profiles and two-dimensional concentration fields result. Estimates were obtained for the concentration boundary layer thickness, δc, and the mass transfer coefficient, kl, along flat and wavy interfaces. A severalfold increase in mass transfer rates is observed for an uns...
48 citations
TL;DR: In this article, both the solubility and volumetric gas−liquid mass transfer coefficient kLa for hydrogen and carbon monoxide in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) at three temperatures (293, 323, and 373 K) in relevance to hydroformylation reaction were reported.
Abstract: Since the past decade, ionic liquids have gained significant importance as alternative solvents for catalysis applications. Many of the reactions evaluated in ionic liquids employ gases as substrates, and therefore it is important to know their solubility and mass transfer characteristics. This work reports for the first time both the solubility and volumetric gas−liquid mass transfer coefficient kLa for hydrogen and carbon monoxide in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) at three temperatures (293, 323, and 373 K) in relevance to hydroformylation reaction. The experimental data on the volumetric gas−liquid mass transfer coefficient are described by a dimensionless correlation for the bench-scale stirred tanks with gas-inducing impeller. kLa values have also been evaluated for different [Bmim][PF6]−decane emulsions at 373 K.
48 citations
TL;DR: The feasibility of utilizing a super-hydrophobic polyether ether ketone (PEEK) hollow fiber membrane contactor in combination with chemical solvents to separate and capture CO 2 from simulated flue gases was investigated in this article.
48 citations