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Reference type: Journal
Authors: Sun CJ, Sun LZ, Sun XX
Article Title: Graphical Evaluation of the Favorability of Adsorption Processes by Using Conditional Langmuir Constant.
Publication date: 2013
Journal: Industrial & Engineering Chemistry Research
Volume: 52
Issue: (39)
Page numbers: 14251-14260.
DOI: 10.1021/ie401571p

Abstract: A graphical method for evaluating the Langmuir favorable adsorption is proposed in this work. The conditional Langmuir constant (KLN), a new parameter related to the Langmuir equilibrium constant (KL), can be used to predict the shapes of Langmuir favorable adsorption isotherms. On the dimensionless Langmuir isotherm diagram, all the Langmuir favorable adsorptions (0 < RL < 1) are further divided into three subgroups: favorable adsorption, very favorable adsorption, and highly favorable or pseudoirreversible adsorption, with two critical Langmuir constants (KLN1 and KLN2) as the demarcation point. The feasibility of the method is demonstrated by analyzing 14 adsorption systems. The graphical method is effective and intuitional, and can be used for the favorable evaluation of any Langmuir isotherms. This method shows the advantage that the parameter KLN does not depend on the initial adsorbate concentration (co) over RL method


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