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Title: Particle-scale CO2 adsorption kinetics modeling considering three reaction mechanisms

Abstract

In the presence of water (H2O), dry and wet adsorptions of carbon dioxide (CO2) and physical adsorption of H2O happen concurrently in a sorbent particle. The three reactions depend on each other and have a complicated, but important, effect on CO2 capturing via a solid sorbent. In this study, transport phenomena in the sorbent were modeled, including the tree reactions, and a numerical solving procedure for the model also was explained. The reaction variable distribution in the sorbent and their average values were calculated, and simulation results were compared with experimental data to validate the proposed model. Some differences, caused by thermodynamic parameters, were observed between them. However, the developed model reasonably simulated the adsorption behaviors of a sorbent. The weight gained by each adsorbed species, CO2 and H2O, is difficult to determine experimentally. It is known that more CO2 can be captured in the presence of water. Still, it is not yet known quantitatively how much more CO2 the sorbent can capture, nor is it known how much dry and wet adsorptions separately account for CO2 capture. This study addresses those questions by modeling CO2 adsorption in a particle and simulating the adsorption process using the model. As adsorptionmore » temperature changed into several values, the adsorbed amount of each species was calculated. The captured CO2 in the sorbent particle was compared quantitatively between dry and wet conditions. As the adsorption temperature decreased, wet adsorption increased. However, dry adsorption was reduced.« less

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1088629
Report Number(s):
PNNL-SA-94894
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
International Journal of Greenhouse Gas Control, 17:388-396
Additional Journal Information:
Journal Name: International Journal of Greenhouse Gas Control, 17:388-396
Country of Publication:
United States
Language:
English
Subject:
CO2 capture, Mathematical modeling, Sorbent particle, Simulation, Adsorption

Citation Formats

Suh, Dong-Myung, and Sun, Xin. Particle-scale CO2 adsorption kinetics modeling considering three reaction mechanisms. United States: N. p., 2013. Web. doi:10.1016/j.ijggc.2013.05.029.
Suh, Dong-Myung, & Sun, Xin. Particle-scale CO2 adsorption kinetics modeling considering three reaction mechanisms. United States. https://doi.org/10.1016/j.ijggc.2013.05.029
Suh, Dong-Myung, and Sun, Xin. 2013. "Particle-scale CO2 adsorption kinetics modeling considering three reaction mechanisms". United States. https://doi.org/10.1016/j.ijggc.2013.05.029.
@article{osti_1088629,
title = {Particle-scale CO2 adsorption kinetics modeling considering three reaction mechanisms},
author = {Suh, Dong-Myung and Sun, Xin},
abstractNote = {In the presence of water (H2O), dry and wet adsorptions of carbon dioxide (CO2) and physical adsorption of H2O happen concurrently in a sorbent particle. The three reactions depend on each other and have a complicated, but important, effect on CO2 capturing via a solid sorbent. In this study, transport phenomena in the sorbent were modeled, including the tree reactions, and a numerical solving procedure for the model also was explained. The reaction variable distribution in the sorbent and their average values were calculated, and simulation results were compared with experimental data to validate the proposed model. Some differences, caused by thermodynamic parameters, were observed between them. However, the developed model reasonably simulated the adsorption behaviors of a sorbent. The weight gained by each adsorbed species, CO2 and H2O, is difficult to determine experimentally. It is known that more CO2 can be captured in the presence of water. Still, it is not yet known quantitatively how much more CO2 the sorbent can capture, nor is it known how much dry and wet adsorptions separately account for CO2 capture. This study addresses those questions by modeling CO2 adsorption in a particle and simulating the adsorption process using the model. As adsorption temperature changed into several values, the adsorbed amount of each species was calculated. The captured CO2 in the sorbent particle was compared quantitatively between dry and wet conditions. As the adsorption temperature decreased, wet adsorption increased. However, dry adsorption was reduced.},
doi = {10.1016/j.ijggc.2013.05.029},
url = {https://www.osti.gov/biblio/1088629}, journal = {International Journal of Greenhouse Gas Control, 17:388-396},
number = ,
volume = ,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 2013},
month = {Sun Sep 01 00:00:00 EDT 2013}
}