Influence of nanoscale pore on gas adsorption capacity of deformed coal

doi:10.16265/j.cnki.issn1003-3033.2018.10.022

Abstract

Abstract: In order to clarify whether tectonic coal has superior gas adsorption capacity and the relationship between nanoscale pores and adsorption capacity, mercury injection, cryogenic liquid nitrogen adsorption and high pressure isothermal adsorption experiments were carried out. Differences in pore structure and gas adsorption capacity between the Ⅳ-Ⅴ tectonic coals from different coal grades and the symbiotic primary structural coals collected from the Jiaozuo, Pingdingshan and Yongxia mining areas were compared and analyzed. The relationship between nanoscale pores and adsorption capacity was explored. Experimental results show that the nano-pores in coal are the major contributor to the specific surface area, and are the determinants of coal's ability to adsorb gas, that compared with the original structural coal symbiotic with the same layer, the nano-scale pores and specific surface area increase slightly, and the adsorption capacity increases little, and does not have super-adsorption capacity, and that the effect of structural deformation on the change of nanoscale pores is far less than that of metamorphism.

Key words: nanoscale pore, tectonic coal, adsorption capacity, specific surface area, pore volume

CLC Number:

X936

YAN Jiangwei, BO Zengqin, YANG Yalei. Influence of nanoscale pore on gas adsorption capacity of deformed coal[J]. China Safety Science Journal, 2018, 28(10): 131-136.

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