Pore-Surface Diffusion Modeling for Dyes from Effluent on Pith

Langmuir ◽  
2001 ◽  
Vol 17 (3) ◽  
pp. 740-748 ◽  
Author(s):  
Buning Chen ◽  
Chi Wai Hui ◽  
Gordon McKay
Keyword(s):  
Surface Diffusion ◽  
Pore Surface ◽  
Diffusion Modeling

Pore-Surface Diffusion Model for Batch Adsorption Processes

Langmuir ◽  
2003 ◽  
Vol 19 (10) ◽  
pp. 4188-4196 ◽  
Author(s):  
Chi-Wai Hui ◽  
Buning Chen ◽  
Gordon McKay
Keyword(s):  
Surface Diffusion ◽  
Diffusion Model ◽  
Batch Adsorption ◽  
Pore Surface ◽  
Adsorption Processes

scholarly journals Nonlinear Frequency Response Analysis as a Tool for Identification of Adsorption Kinetics: Case Study—Pore-Surface Diffusion Control

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Danica V. Brzić ◽  
Menka T. Petkovska
Keyword(s):  
Frequency Response ◽  
Surface Diffusion ◽  
Diffusion Coefficients ◽  
Pore Diffusion ◽  
Diffusion Control ◽  
Response Analysis ◽  
Nonlinear Frequency ◽  
Pore Surface ◽  
Kinetics Of Adsorption ◽  
Nonlinear Frequency Response

In the present paper, the Nonlinear Frequency Response (NFR) analysis is applied for theoretical study of kinetics of adsorption governed by pore-surface diffusion. The concept of higher-order frequency response functions (FRFs) is used. Based on a nonlinear mathematical model for adsorption of pure gas and spherical adsorbent particles, the theoretical first- and second-order FRFs, which relate the adsorbate concentration in the particle to the surrounding pressure (F1(ω) and F2(ω,ω)), have been derived. The obtained FRFs have been simulated for different steady-state pressures and different ratios (between zero and one) of surface to pore diffusion coefficients. The results show that, unlike F1(ω), F2(ω,ω) exhibits features which unambiguously distinguish the pore-surface diffusion model from pure pore diffusion and micropore diffusion. Based on the characteristic features of F1(ω) and F2(ω,ω), a new methodology for direct estimation of the separate values of the pore and surface diffusion coefficients has been established.

Chemically Specific Surface Diffusion of Oxygen through a Porous Membrane Modified with Cobalt Porphyrin on Its Pore Surface

1995 ◽  
Vol 99 (32) ◽  
pp. 12312-12317 ◽  
Author(s):  
Hiroyuki Nishide ◽  
Takayuki Suzuki ◽  
Ryuji Nakagawa ◽  
Keita Itakura ◽  
Eishun Tsuchida
Keyword(s):  
Specific Surface ◽  
Surface Diffusion ◽  
Porous Membrane ◽  
Pore Surface ◽  
Cobalt Porphyrin

The pore surface diffusion model as a tool for rapid screening of novel nanomaterial-enhanced hybrid ion-exchange media

2015 ◽  
Vol 1 (4) ◽  
pp. 448-456 ◽  
Author(s):  
Grigoria Athanasaki ◽  
Laurie Sherrill ◽  
Kiril D. Hristovski
Keyword(s):  
Ion Exchange ◽  
Surface Diffusion ◽  
Diffusion Model ◽  
Screening Tool ◽  
Breakthrough Curves ◽  
Rapid Screening ◽  
Pore Surface

The primary goal of this study was to examine the feasibility of using Pore Surface Diffusion Model (PSDM) as a rapid screening tool to predict breakthrough curves of short bed columns packed with nanomaterial enhanced hybrid-ion exchange media.

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