Application of Computational Mass Transfer (III): Adsorption Process

2014 ◽  
pp. 183-208
Author(s):  
Kuo-Tsong Yu ◽  
Xigang Yuan
Keyword(s):  
Mass Transfer ◽  
Adsorption Process

Adsorption of phosphate onto amine functionalized nano-sized magnetic polymer adsorbents: mechanism and magnetic effects

RSC Advances ◽  
2015 ◽  
Vol 5 (28) ◽  
pp. 22080-22090 ◽  
Author(s):  
Haoyu Shen ◽  
Zhejun Wang ◽  
Ameng Zhou ◽  
Junliang Chen ◽  
Meiqin Hu ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Adsorption Process ◽  
Magnetic Core ◽  
Core Shell ◽  
Magnetic Effects ◽  
Amine Functionalized

Tetraethylenepentamine-functionalized core–shell structured nanomagnetic Fe3O4 polymers (TEPA-Fe3O4-NMPs) with different amounts of magnetic core were synthesized and fully characterized. The magnetic core might favor mass transfer accelerating the adsorption process.

scholarly journals Key parameters controlling an adsorption process for the selective removal of arsenic from drinking water

2002 ◽  
Vol 2 (5-6) ◽  
pp. 111-117 ◽  
Author(s):  
S. Ouvrard ◽  
M.-O. Simonnot ◽  
M. Sardin
Keyword(s):  
Mass Transfer ◽  
Adsorption Process ◽  
Fine Particles ◽  
Mass Transfer Limitation ◽  
Water Ph ◽  
Regeneration Procedure ◽  
Removal Of Arsenic ◽  
The Impact ◽  
Elution Step ◽  
Flow Rate Influence

Arsenic can be selectively removed from water through adsorption on a natural manganese oxide. This paper presents some of the key parameters controlling such a process. Both production and regeneration steps were studied and the influence of three main controlling parameters was put to light. The water pH greatly influenced the adsorption capacity. Low water pH highly improved the treatment. The adsorption being under mass transfer limitation, flow rate influence was measured and optimization solutions were proposed. Finally, the impact of the regeneration procedure was evaluated on the adsorbent stability. It gave good arsenic elution results but the caustic elution step generated fine particles that could not be avoided. The following neutralization could however be adjusted in order to minimize further adsorbent dissolution.

THE EFFECT OF DIFFERENT AMBIENT TEMPERATURE TO SOLAR COOLING PERFORMANCE

2016 ◽  
Vol 78 (5-5) ◽  
Author(s):  
Dewanto Harjunowibowo ◽  
Dina Nur Adilah ◽  
Dwi Teguh Rahardjo ◽  
Danar S. Wijayanto ◽  
Fredy Surahmanto ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Ambient Temperature ◽  
Heat And Mass Transfer ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Adsorption Process ◽  
Mass Transfer Rate ◽  
Cooling Performance ◽  
Solar Cooling

The density of adsorbent bed significantly contributed to solar cooling performance (COP). The density determines how well the heat and mass transfer are. Besides that, the COP is also determined by ambient temperature. This research aims to investigate the affect of temperature of a connecting pipe, as a representative of different ambient temperature against a solar cooling machine performance. The experiment will show in what condition a solar cooling is going to have a better cooling result. The data used in this case was taken experimentally and conducted using a solar cooling machine equipped with temperature measurement units such as thermocouple logger. For cold ambient temperature, in adsorption process, refrigerant vapour flows to the generator through the connecting pipe cooled by water and kept steady. The results show that the COP, heat and mass transfer of adsorbent bed of the system in the adsorption process on a warm condition are better than in a cold environment. In the warm condition the COP system is 0.24, the heat transfer rate is 0.06 °C/minute, and the mass transfer rate is 1.09 ml/minute. Whereas, in the cold condition the COP system is 0.23, the heat transfer rate is 0.05 °C/minute, and the mass transfer rate is 1.04 ml/minute. 

scholarly journals The Experimental Study of the Kinetics of the Cyclic Adsorption Process of Air Enrichment with Oxygen

2021 ◽  
Vol 27 (3) ◽  
pp. 387-400
Author(s):  
E. I. Akulinin ◽  
D. S. Dvoretsky ◽  
S. I. Dvoretsky
Keyword(s):  
Mass Transfer ◽  
Adsorption Process ◽  
Numerical Study ◽  
Air Separation ◽  
Diffusion Resistance ◽  
Kinetic Regime ◽  
Atmospheric Air ◽  
Mass Conductivity ◽  
Cyclic Adsorption ◽  
Kinetics Of

For mass transfer cyclic processes in the “adsorptive - porous adsorbent” system when air is enriched with oxygen by the method of short-cycle heatless adsorption, a new method has been implemented for determining the coefficients of mass transfer and mass conductivity of processes in systems with a solid phase from kinetic curves. It has been experimentally proved that during the adsorption separation of atmospheric air, the rate of cyclic “adsorption - desorption” processes can be limited by both internal and external diffusion resistance. The mass conductivity coefficients are determined depending on the mass content of the distributed adsorptive (O2, N2) by a method that does not require the implementation of the intradiffusion kinetic regime. The analysis of the kinetics of the process of air enrichment with oxygen is carried out; the coefficients of mass transfer and mass conductivity, which can be used in kinetic calculations and numerical study of the properties and modes of the cyclic adsorption process of atmospheric air separation and oxygen concentration, are determined.

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