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Porous carbons are important electrode materials for supercapacitors. One of the challenges associated with supercapacitors is improving their energy density without relying on pseudocapacitance, which is based on fast redox reactions that often shorten device lifetimes. A possible solution involves achieving high total capacitance (Ctot), which comprises Helmholtz capacitance (CH) and possibly quantum...
Thermodynamic analyses of high pressure methane adsorption in shale are rarely reported because of the lack of a reliable approach for obtaining the true adsorption uptake from observed adsorption isotherms and the routinely used, oversimplified Clausius–Clapeyron (C-C) approximation. This work extends our previously proposed dual-site Langmuir adsorption model to calculate the isosteric heat of adsorption...
Adsorbed methane makes up a large portion of the total shale gas-in-place (GIP) resource in deep shale formations. In order to accurately estimate the shale GIP resource, it is crucial to understand the relationship between the adsorbed methane quantity and the free methane quantity of shale gas in shale formations (under high pressure conditions). This work describes and accurately predicts high...
Methane (CH $$_4$$ 4 ) adsorption has been widely studied, mainly in the context of natural gas purification. A much less prominent, but highly relevant application is the preconcentration of CH $$_4$$ 4 from ambient air. In this study, we compare six different commercial adsorbent materials with respect to their effectiveness for methane preconcentration: a macroporous polymeric...
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