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Copyright of Nonferrous Metals (Mineral Processing Section) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Four kinds of coal with different fixed carbon content were selected as experimental samples. The surface morphology and textural character of the samples were characterized by scanning electron microscope (SEM), N2 adsorption-desorption at 77K, respectively, and their specific surface, pore volume and pore-size distribution were calculated based on N2 adsorption-desorption isotherms. And the volumetric method was used to determine its performance of methane adsorption. The influences of fixed carbon content on coal surface morphology, specific surface area, pore volume,pore size distribution and methane sorption capacity were discussed. The results show that fixed carbon content has little influence on specific surface area, pore volume, and pore size distribution when fixed carbon content is in the range of 70.17% -88.34%. When fixed carbon content changes from 88.34% to 94.45%, coal specific surface area and micropore volume increases 1.84 and 5.06 times respectively, and the pore size distribution moves to micro-pore. Methane adsorption capacity follows a U shape second-order polynomial trend with fixed carbon content. [ABSTRACT FROM AUTHOR]