Title: Error analyses in volumetric method for measuring methane and CO₂ adsorption on coal

Authors: Deng-Feng Zhang; Li-Li Gu; Song-Geng Li; Pei-Chao Lian; Jun Tao

Addresses: Faculty of Chemical Engineering, Kunming University of Science and Technology, No. 727 Jingming South Road, Chenggong District, 650500, Kunming, China ' Faculty of Chemical Engineering, Kunming University of Science and Technology, No. 727 Jingming South Road, Chenggong District, 650500, Kunming, China ' State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, No. 1 Bei Er Tiao, Zhongguancun, Haidian District, 100190, Beijing, China ' Faculty of Chemical Engineering, Kunming University of Science and Technology, No. 727 Jingming South Road, Chenggong District, 650500, Kunming, China ' Faculty of Chemical Engineering, Kunming University of Science and Technology, No. 727 Jingming South Road, Chenggong District, 650500, Kunming, China

Abstract: CO₂ sequestration in deep coal seams with enhanced coalbed methane recovery (CO₂-ECBM) is emerging as a promising option to stabilise CO₂ concentration in the atmosphere. Volumetric method for measuring methane and CO₂ adsorption on coal can generate the critical information of the coalbed methane recovery and CO₂ storage amount of the target coal seams. In this work, the potential sources of error involved in volumetric method including sample mass, volume, temperature, pressure and compressibility factor and their impact on the measured methane and CO₂ adsorption amount have been studied using the law of error propagation. Feasible measures to improve the measured precision based on 'fixed volume' method have also been put forward.

Keywords: volumetric method; methane adsorption; CO2; carbon dioxide; carbon adsorption; deep coal seams; coalbed methane recovery; error analysis; carbon sequestration.

DOI: 10.1504/IJGW.2013.053501

International Journal of Global Warming, 2013 Vol.5 No.2, pp.197 - 209

Received: 14 Jun 2012
Accepted: 18 Nov 2012
Published online: 28 Feb 2014 *

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