Topic
Countercurrent exchange
About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.
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TL;DR: The thermogravitational thermal diffusion (TG) was introduced by Clusius and Dickel as mentioned in this paper, where the fluid is confined between closely spaced vertical walls maintained at different temperatures and a convection current is set up with the fluid rising along the hot wall and descending along the cold wall.
Abstract: Gas liquid and solid mixtures undergo a slight demixing in the presence of a temperature difference. This phenomenon, known as thermal diffusion, is illustrated in Figure 1 for the isotopes of neon in the gas phase and for isotopically substituted carbon disulfide in the liquid phase. The separation effect, which is quite small even for relatively large temperature differences, was of no practical significance prior to the invention by Clusius and Dickel of the thermogravitational thermal diffusion column in 19381. In the thermal diffusion column (Figure 2) the fluid is confined between closely spaced vertical walls maintained at different temperatures. A convection current is set up with the fluid rising along the hot wall and descending along the cold wall. Thermal diffusion takes place In the horizontal direction. The combined effects of vertical countercurrent thermogravitational circulation and horizontal thermal diffusion lead to large separations in the vertical direction. The equivalent o...
27 citations
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TL;DR: In this paper, removal of hydrogen sulfide (H2S) and carbon dioxide (CO2) from simulated syngas has been studied on one column scrubbing system.
27 citations
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TL;DR: In this paper, the authors studied countercurrent gas-liquid flow in narrow rectangular channels simulated by plain and perforated fins and observed different flow patterns dependent on flow rates in the channels.
27 citations
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TL;DR: In this paper, general regularities of liquid chromatography with a free stationary phase and countercurrent extraction are considered and an analytical solution to the linear model of nonequilibrium chromatography is presented.
Abstract: Some general regularities of liquid chromatography with a free stationary phase and countercurrent extraction are considered. An analytical solution to the linear model of nonequilibrium chromatography is presented.
26 citations
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TL;DR: In this paper, the separation of the countercurrent hollow fiber membrane module has been characterized adapting a multi-component Progressive Cell Balance (PCB) approach and incorporated within the Aspen HYSYS process simulator.
26 citations