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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
Modified Langmuir equation for predicting type II adsorption isotherms
ZHANG Peikun * #
School of Energy and Environmental Engineering, University of Science and Technology Beijing, 100083
*Correspondence author
#Submitted by
Subject:
Funding:
National Natural Science Foundation of China (No.no. 51306015), Specialized Research Fund for the Doctoral Program of Higher Education (No.no. 20130006120015)
The Langmuir adsorption isotherm equation is modified to include more parameters for fitting Type II isotherms according the Brunauer classification. Unlike some isotherm equations which have a singularity when pressure equal to saturation vapor pressure, one advantage of the modified Langmuir equation is its validity when the iterative value of adsorbate pressure reaches a value around the saturation vapor pressure in numerical simulation. With four equation constants, the modified Langmuir equation fits the full range of isotherms with high accuracy for water on the adsorbents discussed.
Keywords:Adsorption isotherm model, Data correlation, Type II isotherm, Temperature swing adsorption