TY - JOUR
T1 - Adsorption kinetics of rhodium (III) acetylacetonate onto mesoporous silica adsorbents in the presence of supercritical carbon dioxide
AU - Ushiki, Ikuo
AU - Takahashi, Naoto
AU - Koike, Mio
AU - Sato, Yoshiyuki
AU - Takishima, Shigeki
AU - Inomata, Hiroshi
N1 - Funding Information:
This research was financially supported by the JSPS (Japan Society for the Promotion of Science) KAKENHI ( 16K18273 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/5/1
Y1 - 2018/5/1
N2 - The adsorption kinetics of rhodium (III) acetylacetonate (Rh(acac)3) onto three types of mesoporous silica adsorbents, MCM-41, HMS, and MSU-H, in the presence of supercritical carbon dioxide (scCO2) at temperatures from 313 to 353 K and at a pressure of 15.0 MPa were studied using fixed-bed adsorption measurements. The breakthrough curves obtained with the measurements were correlated by a mathematical kinetic model using only one fitting parameter, the effective diffusion coefficient of Rh(acac)3 in pores (De). The determined De values depended strongly on the temperature and the types of mesoporous silica used, which could be described using a generalized model that includes the parameters in consideration of the pore structure of the adsorbents (porosity and tortuosity) and the diffusion coefficient of Rh(acac)3 in the bulk scCO2 phase.
AB - The adsorption kinetics of rhodium (III) acetylacetonate (Rh(acac)3) onto three types of mesoporous silica adsorbents, MCM-41, HMS, and MSU-H, in the presence of supercritical carbon dioxide (scCO2) at temperatures from 313 to 353 K and at a pressure of 15.0 MPa were studied using fixed-bed adsorption measurements. The breakthrough curves obtained with the measurements were correlated by a mathematical kinetic model using only one fitting parameter, the effective diffusion coefficient of Rh(acac)3 in pores (De). The determined De values depended strongly on the temperature and the types of mesoporous silica used, which could be described using a generalized model that includes the parameters in consideration of the pore structure of the adsorbents (porosity and tortuosity) and the diffusion coefficient of Rh(acac)3 in the bulk scCO2 phase.
KW - Adsorption kinetics
KW - Breakthrough curve
KW - Mesoporous silica
KW - Metal precursor
KW - Rhodium acetylacetonate
KW - Supercritical carbon dioxide
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U2 - 10.1016/j.supflu.2018.01.017
DO - 10.1016/j.supflu.2018.01.017
M3 - Article
AN - SCOPUS:85042930219
SN - 0896-8446
VL - 135
SP - 137
EP - 144
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
ER -