Gas adsorption measurement on coals for CO2-ECBM
A great number of gas adsorption isotherms on coals have been reported in relevant literature without clear description on the measurement conditions. This paper discusses important issues on gas adsorption measurements on coals in terms of degassing conditions, sample particle sizes and argon adsorption at 87 K with CO2 at 273 K. For gas adsorption measurements, coal blocks needs to be crushed or ground to a certain range of particle sizes to reduce experimental time but not to lose their original nature and structure. Also proper degassing conditions should be applied not to alter the original structure. Conventional methods such as N2 and Ar at cryogenic temperatures to characterize porous media are not applicable to reveal the structural information of coals. This paper proves that even mesopores can not be detected correctly with argon adsorption at 87 K. In addition, a minimuM in argon adsorption at 87 K and relative pressure of about 0.6 was found and discussed.
CBM gas adsorption coal CO2-ECBM, sample preparation
J.S. Bae S.K.Bhatia P. Massarotto V.Rudolph C. H. Shin
Division of Chemical Engineering, The University of Queensland, St. Lucia, QLD, 4072, Australia Department of Environmental Engineering, Dongseo University, Busan, 617-716, Korea
国际会议
徐州
英文
704-711
2009-09-24（万方平台首次上网日期，不代表论文的发表时间）