Hybrid isotherms for adsorption and capillary condensation of N2 at 77 K on porous and non-porous materials

被引：52

作者：

Kumar, K. Vasanth ^{[1
]}

Valenzuela-Calahorro, C. ^{[2
]}

Juarez, J. M. ^{[1
]}

Molina-Sabio, M. ^{[1
]}

Silvestre-Albero, J. ^{[1
]}

Rodriguez-Reinoso, F. ^{[1
]}

机构：

[1] Univ Alicante, Lab Mat Avanzados, Dept Quim Inorgan, E-03080 Alicante, Spain

[2] Univ Granada, Dept Quim Inorgan, Fac Farm, E-18071 Granada, Spain

来源：

CHEMICAL ENGINEERING JOURNAL | 2010年 / 162卷 / 01期

关键词：

Adsorption; Capillary condensation; N-2; Equilibrium; Hybrid isotherms; ACTIVATED CARBONS; EQUILIBRIUM; MCM-41;

D O I：

10.1016/j.cej.2010.04.058

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A simple hybrid isotherm, which is an addition of Frenkel-Halsey-Hill isotherm to the Redlich-Peterson (RPFHH) isotherm, is proposed, taking into account the theoretical limitations of these models. The hybrid isotherm was fitted to N-2 adsorption isotherm (at 77K) on porous and non-porous materials that involve only an adsorption step or an additional step due to condensation of the gas molecules on large pores. The RPFHH isotherm was found to be the successful in representing the N2 adsorption isotherm of any type of porous and non-porous materials over the whole range of relative pressure range. The RPFHH isotherm can be adjusted to identify the adsorption process besides the condensation process, allowing to determine the theoretical sorption capacity. The surface area of the materials predicted by the RPFHH was in general in good agreement with the values obtained by the BET method. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：424 / 429

页数：6

共 22 条

[1]

[Anonymous], 1975, KINETIC THEORY LIQUI

[2] Interactions of xanthines with activated carbon II.: The adsorption equilibrium [J].

Casas, R. Navarrete ;

Rodriguez, A. Garcia ;

Bueno, F. Rey ;

Lara, A. Espinola ;

Calahorro, C. Valenzuela ;

Guijosa, A. Navarrete .

APPLIED SURFACE SCIENCE, 2006, 252 (17) :6026-6030

[3] Theoretical Insight of Physical Adsorption for a Single-Component Adsorbent plus Adsorbate System: I. Thermodynamic Property Surfaces [J].

Chakraborty, Anutosh ;

Saha, Bidyut Baran ;

Ng, Kim Choon ;

Koyama, Shigeru ;

Srinivasan, Kandadai .

LANGMUIR, 2009, 25 (04) :2204-2211

[4] USE OF N2 VS CO2 IN THE CHARACTERIZATION OF ACTIVATED CARBONS [J].

GARRIDO, J ;

LINARESSOLANO, A ;

MARTINMARTINEZ, JM ;

MOLINASABIO, M ;

RODRIGUEZREINOSO, F ;

TORREGROSA, R .

LANGMUIR, 1987, 3 (01) :76-81

[5] POROSITY OF ACTIVATED CARBONS PREPARED FROM DIFFERENT LIGNOCELLULOSIC MATERIALS [J].

GONZALEZ, JC ;

GONZALEZ, MT ;

MOLINASABIO, M ;

RODRIGUEZREINOSO, F ;

SEPULVEDAESCRIBANO, A .

CARBON, 1995, 33 (08) :1175-1177

[6] CORRELATION BETWEEN SURFACE-AREAS AND MICROPORE VOLUMES OF ACTIVATED CARBONS OBTAINED FROM PHYSICAL ADSORPTION AND IMMERSION CALORIMETRY [J].

GONZALEZ, MT ;

SEPULVEDAESCRIBANO, A ;

MOLINASABIO, M ;

RODRIGUEZREINOSO, F .

LANGMUIR, 1995, 11 (06) :2151-2155

[7] PHYSICAL ADSORPTION ON NON-UNIFORM SURFACES [J].

HALSEY, G .

JOURNAL OF CHEMICAL PHYSICS, 1948, 16 (10) :931-937

[8] THERMODYNAMICS OF ADSORPTION [J].

HILL, TL .

TRANSACTIONS OF THE FARADAY SOCIETY, 1951, 47 (04) :376-380

[9]

KUMAR KV, 2007, THESIS ANNA U

[10] The constitution and fundamental properties of solids and liquids Part I Solids [J].

Langmuir, I .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1916, 38 :2221-2295

← 1 2 3 →