TY - JOUR
T1 - A generalized model for predicting adsorption equilibria of various volatile organic compounds on activated carbon in the presence of supercritical carbon dioxide
AU - Ushiki, Ikuo
AU - Sato, Yoshiyuki
AU - Ito, Yasuyuki
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 ( 18K14045 ).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/4
Y1 - 2019/4
N2 - A generalized model for predicting the adsorption equilibria of various VOCs (volatile organic compounds: acetone, toluene, n-hexane, n-octane, n-decane, methanol, ethanol, 2-propanol, and propylene glycol monomethyl ether (PGME)) on activated carbon in supercritical carbon dioxide (scCO2) was proposed. The two fitting parameters W0,VOC (saturated adsorption capacity of activated carbon for VOC) and EVOC (interaction energy between VOC and adsorbent) of the Dubinin-Astakhov (DA) equation, determined with the correlations to experimental adsorption equilibrium data, were found to be closely related to the density of CO2 and properties of VOCs, which could be generalized based on the physical meanings of each parameter. The generalized DA parameters were able to reproduce the adsorption equilibria of the various VOCs in scCO2 to within 30% of the average relative deviation over a wide range of temperature and pressure conditions for most of the VOCs.
AB - A generalized model for predicting the adsorption equilibria of various VOCs (volatile organic compounds: acetone, toluene, n-hexane, n-octane, n-decane, methanol, ethanol, 2-propanol, and propylene glycol monomethyl ether (PGME)) on activated carbon in supercritical carbon dioxide (scCO2) was proposed. The two fitting parameters W0,VOC (saturated adsorption capacity of activated carbon for VOC) and EVOC (interaction energy between VOC and adsorbent) of the Dubinin-Astakhov (DA) equation, determined with the correlations to experimental adsorption equilibrium data, were found to be closely related to the density of CO2 and properties of VOCs, which could be generalized based on the physical meanings of each parameter. The generalized DA parameters were able to reproduce the adsorption equilibria of the various VOCs in scCO2 to within 30% of the average relative deviation over a wide range of temperature and pressure conditions for most of the VOCs.
KW - Activated carbon
KW - Adsorption equilibria
KW - Dubinin-Astakhov equation
KW - Regeneration
KW - Supercritical carbon dioxide
KW - Volatile organic compound (VOC)
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U2 - 10.1016/j.supflu.2019.01.005
DO - 10.1016/j.supflu.2019.01.005
M3 - Article
AN - SCOPUS:85059960199
SN - 0896-8446
VL - 146
SP - 30
EP - 37
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
ER -