固体在液相中吸附热力学参数计算介绍

doi:10.3866/PKU.DXHX202003032

Abstract

Abstract:

The adsorption on the solid-liquid interface is important for industry and daily life. To investigate the adsorption process, the adsorption thermodynamics usually are essential. The adsorption thermodynamics are analyzed with the parameters of the change of Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS). In this presentation, the different methods for calculation of the adsorption thermodynamics parameters are introduced. Moreover, examples for calculations and applications of the adsorption thermodynamics are presented.

Key words: Adsorption, Thermodynamics, Thermodynamics parameter

Weitao Wang, Xiangli Chen, Baiqin Yang. Calculation of Adsorption Thermodynamics Parameters for Adsorption on the Solid-Liquid Interface[J].University Chemistry, 2021, 36(2): 2003032.

Figures/Tables 5

References 23

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模型名称	模型方程表达式
Langmuir方程	$ {q}_{\mathrm{e}}=\frac{{q}_{m}{K}_{\mathrm{L}}{c}_{\mathrm{e}}}{1+{K}_{\mathrm{L}}{c}_{\mathrm{e}}} $
Freundlich方程	$ {q}_{\mathrm{e}}={K}_{\mathrm{F}}{c}_{\mathrm{e}}^{1/n} $
Herry方程	$ {q}_{\mathrm{e}}={K}_{\mathrm{H}}{c}_{\mathrm{e}} $
Redlich-Peterson方程	$ {q}_{\mathrm{e}}=\frac{A{c}_{\mathrm{e}}}{1+B{c}_{\mathrm{e}}^{g}} $
Temkin方程	$ {q}_{\mathrm{e}}=A+B\mathrm{l}\mathrm{n}{c}_{\mathrm{e}} $
Kobe-Corrigan方程	$ {q}_{\mathrm{e}}=\frac{A{c}_{\mathrm{e}}^{n}}{1+B{c}_{\mathrm{e}}^{n}} $

ΔG/(kJ?mol^-1)	ΔH/(kJ?mol^-1)	ΔS/(kJ?mol^-1?K^-1)
-15.66 ± 4.84	31.53 ± 0.01	150.67 ± 15.50

吸附质	C₂H₅OH	C₃H₇OH	C₄H₉OH	C₅H₁₁OH	C₆H₁₃OH	C₈H₁₇OH
ΔG/(kJ?mol^-1)	-20.8	-19.3	-18.2	-17.4	-16.7	-15.5

吸附质	ΔG/(kJ?mol^-1)	ΔH/(kJ?mol^-1)	ΔS/(kJ?mol^-1?K^-1)
苯	-9.28	-9.03	-6.27
萘	-8.61	-15.7	-25.0
蒽	-8.44	17.5	-33.4
菲	-8.27	-16.0	-27.2

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Calculation of Adsorption Thermodynamics Parameters for Adsorption on the Solid-Liquid Interface

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