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Theoretical analysis and experimental study on SO 2 adsorption onto pistachio‐nut‐shell activated carbon
Author(s) -
Lua Aik Chong,
Yang Ting
Publication year - 2009
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11684
Subject(s) - microporous material , adsorption , activated carbon , thermal diffusivity , diffusion , tortuosity , sorption , chemistry , thermodynamics , macropore , shell (structure) , surface diffusion , particle (ecology) , carbon fibers , chemical engineering , chromatography , materials science , porosity , composite material , organic chemistry , mesoporous material , physics , oceanography , engineering , geology , catalysis , composite number
The adsorption study of SO 2 onto the activated carbon prepared from pistachio‐nut shell was studied theoretically and experimentally. A single‐particle sorption model known as concentration‐dependent surface diffusivity micropore, surface and macropore diffusion control model incorporating micropore, macropore and surface diffusions, together with a nonlinear isotherm at the micropore mouth, has been derived and solved by a finite difference method. The effects of different types of nonlinear isotherms and concentration dependent surface diffusivities have been thoroughly studied. The effects of adsorbate concentration and temperature on adsorption were studied experimentally. Good agreement was found between the model predictions and the experimental results. The value of the tortuosity factor and the extracted diffusion coefficients obtained are consistent with their corresponding values reported. © 2008 American Institute of Chemical Engineers AIChE J 2009