Adsorption of Linear Alcohols in Amorphous Activated Carbons: Implications for Energy Storage Applications

Abstract

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On the Use of Water and Methanol with Zeolites for Heat Transfer

“…Our previous publication investigated the adsorption-driven heat transfer of the four first aliphatic alcohols for heat storage applications using activated carbons. 58 We concluded that methanol exhibits the best performance among the other alcohols for heat storage applications in large pore nanoporous materials. We analyzed the effect of the hydrophobic/hydrophilic nature of the adsorbent on the adsorption behavior, external operating conditions, and energy storage.…”

“…This theory is based on the idea that the adsorption mechanisms in micropores is due to the volume filling by the gas molecules instead of surface coverage by successive adsorbed layers . A brief description of the thermodynamical model as used in this work can be found in the Supporting Information and is also available in the literature. ,,,,, In short, we first used the adsorption isobars and isotherms to calculate the adsorption characteristic curve . This reduces the two-dimensional relation between loading ( q ( p , T )), temperature ( T ), and pressure ( p ), to the temperature–pressure invariant characteristic curve ( W ( A )).…”

“… 54 A brief description of the thermodynamical model as used in this work can be found in the Supporting Information and is also available in the literature. 43 , 48 , 51 , 53 , 54 , 58 In short, we first used the adsorption isobars and isotherms to calculate the adsorption characteristic curve. 82 This reduces the two-dimensional relation between loading ( q ( p , T )), temperature ( T ), and pressure ( p ), to the temperature–pressure invariant characteristic curve ( W ( A )).…”

“…This means that adsorption isotherms/isobars at different conditions should fall into the same characteristic curve. 43 , 58 This property makes the characteristic curve a useful tool to predict adsorption values at different working conditions. Figure S2 shows a comparison of adsorption isotherms of water and methanol in the three zeolites at different temperatures obtained from GCMC simulations with those predicted from the characteristic curve.…”

“…We have chosen methanol as an alternative to water as the conventional working fluid. Our previous publication investigated the adsorption-driven heat transfer of the four first aliphatic alcohols for heat storage applications using activated carbons . We concluded that methanol exhibits the best performance among the other alcohols for heat storage applications in large pore nanoporous materials.…”