Prediction of VOCs adsorption equilibria on activated carbon in supercritical carbon dioxide over a wide range of temperature and pressure by using pure component adsorption data: Combined approach of the Dubinin–Astakhov equation and the non-ideal adsorbed solution theory (NIAST)

Multicomponent (Binary and Ternary) Adsorption Equilibria of Volatile Organic Compounds (Acetone, Toluene, and n-Hexane) on Activated Carbon in Supercritical Carbon Dioxide

“… a Molar mass of VOC i b Characteristic adsorption energy between VOC and adsorbent determined with the pure component adsorption equilibrium data of each VOC by using the Dubinin–Astakhov equation c Binary interaction parameters between CO 2 and VOC in the van der Waals one-fluid mixing rule for the Peng–Robinson equation of state determined from phase equilibrium data of corresponding CO 2 –VOC binaries. …”

“… b Characteristic adsorption energy between VOC and adsorbent determined with the pure component adsorption equilibrium data of each VOC by using the Dubinin–Astakhov equation …”

“… a Determined by nitrogen adsorption with t method b Determined by helium loading with a magnetic suspension balance …”

Adsorption kinetics and equilibria of two methanol samples with different water content on activated carbon

“…Since solvents are widely used in chemical industry, e.g., as basic chemicals in synthesis processes, the separation of valuable or environmentally critical gaseous solvents from exhaust gas is an indispensable process step. Through adsorption, the solvents can not only be removed from the exhaust gas stream but also be recycled at the same time [1]. In addition, solvents are used as a working fluid in adsorption refrigeration systems [2].…”

“…The intention of this study is to show that it is necessary to provide accurate information about the samples used to make the experimental studies more comprehensible. Since experimental adsorption data of pure substances, e.g., are often used for multicomponent modeling [1], impurities such as water can affect the modeling results. [44] Activated carbon N.A Equilibrium Linders et al [45] Activated carbon N.A Equilibrium Fletcher et al [46] MOF 99.9% Equilibrium and kinetic Fletcher et al [47] MOF 99.9% Equilibrium and kinetic Fletcher et al [48] Activated carbon 99.8% Equilibrium and kinetic Wang et al [49] Activated carbon N.A Equilibrium El-Sharkawy et al [50] Activated carbon 99.95% Equilibrium Henninger et al [51] Activated carbon N.A Equilibrium Ushiki et al [1] Activated carbon 99.7% Equilibrium Wu et al [11] Activated carbon > 99.9% b Equilibrium Xiao et al [52] Zeolite + spherical Al 2 O 3 99.9% Equilibrium and Kinetic Gao et al [53] Zeolite 99.5% Kinetic…”