High-pressure adsorption of methane and carbon dioxide on coal

Bae, Jun-Seok and Bhatia, Suresh K. (2006) High-pressure adsorption of methane and carbon dioxide on coal. Energy & Fuels, 20 6: 2599-2607. doi:10.1021/ef060318y


Author Bae, Jun-Seok
Bhatia, Suresh K.
Title High-pressure adsorption of methane and carbon dioxide on coal
Journal name Energy & Fuels   Check publisher's open access policy
ISSN 0887-0624
Publication date 2006
Sub-type Article (original research)
DOI 10.1021/ef060318y
Volume 20
Issue 6
Start page 2599
End page 2607
Total pages 9
Editor Sophie Wilkinson
Place of publication Washington
Publisher Amer Chemical Soc
Collection year 2006
Language eng
Subject C1
290699 Chemical Engineering not elsewhere classified
770101 Climate change
Abstract Adsorption isotherms of methane and carbon dioxide on two kinds of Australian coals have been measured at three temperatures up to pressures of 20 MPa. The adsorption behavior is described by three isotherm equations: extended three-parameter, Langmuir, and Toth. Among these, the Toth equation is found to be the most suitable, yielding the most realistic values of pore volume of the coals and the adsorbed phase density. Also, the surface area of coals obtained from CO2 adsorption at 273 K is found to be the meaningful parameter which captures the CO2 adsorption capacity. A maximum in the excess amount adsorbed of each gas appears at a lower pressure with a decrease in temperature. For carbon dioxide, after the appearance of the maximum, an inflection point in the excess amount adsorbed is observed close to the critical density at each temperature, indicating that the decrease in the gas-phase density change with pressure influences the behavior of the excess amount adsorbed. In the context of CO2 sequestration, it is found that CO2 injection pressures of lower than 10 MPa may be desirable for the CH4 recovery process and CO2-holding capacity.
Keyword Engineering, Chemical
Density-functional Theory
Gas-adsorption
Supercritical Gases
Activated Carbon
Moisture-content
Drying Methods
Surface-areas
Co2
Temperature
Equation
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 09:44:15 EST