For the thorough research on coal metamorphism impact on gas adsorption capacity, this paper collected and summarized parameters of experimental adsorption isotherms, coal maceral, proximate analysis and ultimate analysis obtained from National Engineering Research Center of Coal Gas Control and related literatures at home and abroad, systematically discussed the coal rank effect on its physicochemical properties and methane adsorption capacity, in which the coal rank was shown in Vitrinite reflectance, furthermore, obtained the Semi-quantitative relationship between physicochemical properties of coal and methane adsorption capacity.
It
is quite challenging to prepare subnanometer porous materials
from traditional porous precursors, and use of supramolecules as carbon
sources was seldom reported due to the complex preparation and purification
processes. We explore a facile one-pot method to fabricate supramolecular
coordination compounds as carbon sources. The resultant CB[6]-derived
carbons (CBC) have a high N content of 7.0–22.0%, surface area
of 552–861 m2 g–1, and subnano/mesopores.
The CBC electrodes have a narrow size distribution at 5.9 Å,
and the supercapacitor exhibits an energy density of 117.1 Wh kg–1 and a potential window of over 3.8 V in a two-electrode
system in the ionic liquid (MMIMBF4) electrolyte with appropriate
cationic (5.8 Å) and anionic (2.3 Å) diameter. This work
presents the facile fabrication of novel supermolecule cucurbituril
subnanoporous carbon materials and the smart design of “pores
and balls” for high-performance energy storage systems.
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