Effects of Coal Functional Groups on Adsorption Microheat of Coal Bed Methane

• DOI: 10.1021/ef502718s
• Publication Date: 2015-02-10T23:22:18Z
• Authors: Fubao Zhou; Shiqi Liu; Yeqing Pang; Jianlong Li; Haihui Xin
• Keywords: 13. Climate action; 0211 other engineering and technologies; 02 engineering and technology; 7. Clean energy

This study measured the adsorption heat for five groups of Chinese coal samples different ranks at 15 °C and 0.101 MPa using a C80 microcalorimeter. The functional were determined by infrared spectroscopy according to quantum chemical theory. effects coalification on methane discussed in terms energy. As result, this has further perfected theory bed methane. results show that first increases, then decreases with increasing rank reaches minimum fat stage. indicates significant effect characteristics These can be clearly classified into stages. Coalification influences changing type coal, content oxygen-containing groups, pore structure. Oxygen-containing influence via potential molecules. In long-flame stage, high leads coking stages, large numbers aliphatic series, side chains aromatic condensed nuclei are removed from molecules under mechanical compression dehydration. decrease value its changes little because weak high-rank stage (lean anthracite), internal surface area micropores transition pores caused significantly higher degree aromatization coal. increase improves some extent.