Microstructure and its influence on CH4 adsorption behavior of deep coal

doi:10.1088/1674-1056/23/2/028201

Abstract In this paper we investigate the influence of microstructure on the CH₄ adsorption behavior of deep coal. The coal microstructure is characterized by N₂ adsorption at 77 K, scanning electron microscopy (SEM), Raman spectroscopy, and Fourier transform infrared spectroscopy (FT-IR). The CH₄ adsorptions are measured at 298 K at pressures up to 5.0 MPa by the the volumetric method and fitted by the Langmuir model. The results show that the Langmuir model fits well with the experimental data, and there is a positive correlation with surface area, pore volume, I_D/I_G, and CH₄ adsorption capacity. The burial depth also affects the methane adsorption capacity of the samples.

Keywords: CH₄ adsorption deep coal pore structure surface morphology

Received: 27 March 2013
Revised: 23 May 2013
Accepted manuscript online:

PACS:	82.80.Dx	(Analytical methods involving electronic spectroscopy)
	68.43.-h	(Chemisorption/physisorption: adsorbates on surfaces)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB201202).

Corresponding Authors: Liu Dai-Jun, Chu Wei
E-mail: liudj721@163.com;chuwei1965scu@163.com

About author: 82.80.Dx; 68.43.-h

Cite this article:

Feng Yan-Yan (冯艳艳), Jiang Cheng-Fa (江成发), Liu Dai-Jun (刘代俊), Chu Wei (储伟) Microstructure and its influence on CH₄ adsorption behavior of deep coal 2014 Chin. Phys. B 23 028201

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Microstructure and its influence on CH₄ adsorption behavior of deep coal