Linear driving force approximations for diffusion controlled adsorption in molecular sieve columns

AIChE Journal ◽  
1975 ◽  
Vol 21 (1) ◽  
pp. 200-202 ◽  
Author(s):  
D. R. Garg ◽  
D. M. Ruthven
Keyword(s):  
Molecular Sieve ◽  
Driving Force ◽  
Linear Driving Force ◽  
Diffusion Controlled ◽  
Controlled Adsorption

Linear Driving Force Model in Carbon Dioxide Capture by Adsorption

2016 ◽  
Vol 830 ◽  
pp. 38-45 ◽  
Author(s):  
Leonardo Hadlich de Oliveira ◽  
Joziane Gimenes Meneguin ◽  
Edson Antonio da Silva ◽  
Maria Angélica Simões Dornellas de Barros ◽  
Pedro Augusto Arroyo ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Breakthrough Curve ◽  
Driving Force ◽  
Fixed Bed ◽  
Isotherm Models ◽  
Force Model ◽  
Transfer Resistance ◽  
Linear Driving Force

In this work, experimental data of CO2 capture by adsorption was determined gravimetrically, at 30 °C and pressures up to 40 bar, and in a fixed bed unit at 20 bar, using NaY as adsorbent. Langmuir, Sips and Tóth isotherm models were used to correlate the equilibrium data. Sips and Tóth models were best fitted allowing estimate the maximum CO2 adsorbed amount. The breakthrough curve was modeled using Linear Driving Force (LDF) and Thomas models. The LDF model represented better the CO2 breakthrough curve than Thomas model. The mass transfer resistance in NaY micropores can be assumed as the limiting step for CO2 adsorption in fixed bed, since the intraparticle mass transfer coefficient of LDF model was smaller than the experimental overall volumetric mass transfer coefficient, although external film resistance is not negligible.

Combined Experimental and Numerical Investigation of Linear Driving Force Kinetics in Small Activated Carbon Beds

2019 ◽  
Vol 58 (36) ◽  
pp. 16978-16988
Author(s):  
Samuel G. A. Wood ◽  
Nilanjan Chakraborty ◽  
Martin W. Smith ◽  
Mark J. Summers
Keyword(s):  
Activated Carbon ◽  
Numerical Investigation ◽  
Driving Force ◽  
Linear Driving Force
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