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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Contour plot of the Standard Error of the Estimate (SEE) of CH4 sorption in PIM-1 at 25 °C, obtained varying the Langmuir sorption parameters, with a fixed value of the Henry’s constant.