Adsorption Equilibrium and Kinetics of CO2 and H2O on ActivatedCarbon

doi:10.3724/SP.J.1077.2012.00139

Abstract

Abstract:

Activated carbon is well applied in pressure swing adsorption process for CO₂capture. The real flue gas contains saturated water vapor as well. In this study, single and binary components adsorption equilibrium and kinetics of H₂O/CO₂ were studied according to their adsorption isotherms and breakthrough curves. Results showed that activated carbon could adsorb high amount of CO₂ and low amount of N₂, that showed a good CO₂/N₂selectivity. As activated carbon contains the functional groups, the activated carbon can adsorb large amount water at high water partial pressure. However, because of different CO₂ adsorption mechanism, water adsorption has almost no impact on CO₂ adsorption on activated carbon. The kinetics study showed that CO₂ adsorption velocity on activated carbon is much faster than that of H₂O.

Key words: carbon dioxide, water vapor, adsorption, isotherm, breakthrough

CLC Number:

TQ174

XU Dong, ZHANG Jun, LI Gang, XIAO Penny, WEBLEY Paul, ZHAI Yu-Chun. Adsorption Equilibrium and Kinetics of CO₂and H₂O on ActivatedCarbon[J]. Journal of Inorganic Materials, 2012, 27(2): 139-145.

Figures/Tables 11

Table 1 Physical properties of activated carbon

Property	Activated carbon
Original material	Coconut shell
Shape	Granular
Activated method	Steam
BET surface/(m²·g^-1)	921.7
Total pore volume /(cm³·g^-1)	0.37
Nominal pore size /nm	0.73

Fig. 1 SEM image of activated carbon

Fig. 2 Schematic diagram of the H2O/CO2 single & binary isothermal adsorption unit

Fig. 3 Diagram for breakthrough experiments

Fig. 4 Pore size distribution of activated carbon calculated from nitrogen and adsorption isotherms using DFT model

Fig. 5 IR analyses of activated carbon in different conditions

Fig. 6 Adsorption isotherms of CO2 and N2 onto activated carbon Dots are experimental results and lines represent model fitting by single site Langmuir equation

Fig. 7 Adsorption isotherms of water vapor onto activated carbon at (a) 25, 30 and 35℃ of experimental data, (b) 25, 35, 50 and 60℃ with model fitting data

Fig. 8 Single and binary adsorption isotherms of water vapor and CO2 onto activated carbon

Fig. 9 Both single and binary breakthrough curves for (a) CO2 and (b) H2O at the bed

Fig. 10 Temperature swing profiles in binary breakthrough experiments at flow of (a) 100 L/min and (b) 50 L/min

References 21

[1]	费维扬, 艾宁, 陈健. 温室气体的捕集和分离-分离技术面临的挑战与机遇. 化工进展, 2005, 24(1):1-4.
[2]	Jose D F, TIimothy F, Sean P, et al. Advances in CO2 capture technology—The U.S. department of energy’s carbon sequestration program. Journal of Greenhouse Gas Control, 2008, 2(1): 9-20.
[3]	李天成, 冯霞, 李鑫钢. 二氧化碳处理技术现状及其发展趋势. 化学工业与工程, 2002, 19(2):190-197.
[4]	Xu X, Wang D. Reducing greenhouse gas emissions from energy consumption activities by the iron and steel industry in East China. Energy Sources, 1999, 21(6): 541-546.
[5]	Yang R T. Gas Separation by Adsorption Processes. Michigan: Imperial Collage Press, 1997: 237-247.
[6]	Takamura Y S, Narita J, Aoki S. Evaluation of dual-bed pressure swing adsorption for CO2 recovery from boiler exhaust gas. Separation and Purification Technology, 2001, 24(3): 519-522.
[7]	Daeho K, Ranjani S, Lorenz T B. Optimization of pressure swing adsorption and fractionated vacuum pressure swing adsorption processes for CO2 capture. Ind. Eng. Chem. Res., 2005, 44(21): 8084-8094.
[8]	Zhang J, Xiao P, Li G, et al. Effect of flue gas impurities on CO2 capture performance from flue gas at coal-fired power stations by vacuum swing adsorption. Energy Procedia, 2009, 1(1): 1115-1122.
[9]	Chue K T, Kim J N, Yoo Y J, et al. Comparison of activated carbon and zeolite 13X for CO2 recovery from flue gas by pressure swing adsorption. Ind. Eng. Chem. Res., 1995, 34(2): 591-598.
[10]	Xiao P, Zhang J, Webley P, et al. Capture of CO2 from flue gas streams with zeolite 13X by vacuum-pressure swing adsorption. Adsorption, 2008, 14(4/5): 575-582.
[11]	Harlick P J, Tezel F H. An experimental adsorbent screening study for CO2 removal from N2. Microporous and Mesoporous Materials, 2004, 76(1/2/3): 71-79.
[12]	Li G, Xiao P, Webley P, et al. Capture of CO2 from high humidity flue gas by vacuum swing adsorption with zeolite 13X. Adsorption, 2008, 14(2/3): 415-422.
[13]	Li G, Xiao P, Webley P, et al. Competition of CO2/H2O in adsorption based CO2 capture. Energy Procedia, 2009, 1(1): 1123-1130.
[14]	Ahn H, Lee C. Effects of capillary condensation on adsorption and thermal desorption dynamics of water in zeolite 13X and layered beds. Chemical Engineering Science, 2004, 59(13): 2727-2743.
[15]	李明, 周理, 吴琴. 多组分气体吸附平衡理论研究进展. 化学进展, 2002, 14(2): 93-98.
[16]	Qi S, Hay K J, Rood J M, et al. Equilibrium and heat of adsorption for water vapor and activated carbon. Journal of Environmental Engineering, 2000, 126(3): 267-271.
[17]	Rutherford S W. Modeling water adsorption in carbon micropores: study of water in carbon molecular sieves. Langmuir, 2006, 22(2): 702-708.
[18]	Mu1ller E A, Rull L F, Vega L F, et al. Adsorption of water on activated carbons: a molecular simulation study. J. Phys. Chem., 1996, 100(4): 1189-1196.
[19]	Murdock J N, Wetzel D L. FT-IR microspectroscopy enhances biological and ecological analysis of algae. Applied Spectroscopy Reviews, 2009, 44(4): 335-361.
[20]	McCallum C L, Bandosz T J, McGrothe S C, et al. A molecular model for adsorption of water on activated carbon: comparison of simulation and experiment. Langmuir, 1999, 15(2): 533-544.
[21]	CHEN Zhan-Ying, WANG Xu-Hui, WANG Ya-Long, et al. Dynamic adsorption and desorption properties of xenon on activated carbon fiber. Journal of Inorganic Materials, 2006, 21(1): 81-86.

Adsorption Equilibrium and Kinetics of CO₂and H₂O on ActivatedCarbon

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