Adsorption characteristics of binary vapors among acetone, MEK, benzene, and toluene

Abstract

Adsorption dynamics of single and binary vapor systems on the activated carbon bed were studied by using acetone, methylethyketone (MEK), benzene, and toluene. Relationships between the equilibrium adsorption capacity and the characteristics of vapors such as molecular weight, density, boiling point, vapor pressure, molecular diameter, and polarity index were also investigated. From breakthrough experiments, toluene had the strongest affinity with activated carbon in the single and binary vapor systems. The shape of the breakthrough curves of vapor with higher affinity in the binary system was similar to that of the single vapor. On the other hand, the vapor with lower affinity showed a roll-up phenomenon, but the level of roll-up became lower and wider with the increase in fraction in the binary system.

Adsorption and degradation of model volatile organic compounds by a combined titania–montmorillonite–silica photocatalyst

“…As it is generally accepted that the adsorbability of gaseous organics on the adsorbent relies on their physical properties [35]. Herein, four characteristic parameters of the adsorbates (molecular weight, boiling point, vapor pressure and dielectric constant), summarized in Table S2, are selected to evaluate the relations between them and the adsorption capacities on pretreated silica gel which is the dominant component for support in all prepared samples (Fig.…”

Fixed-bed adsorption of toluene on high silica zeolites: experiments and mathematical modelling using LDF approximation and a multisite model

“…Activated carbon is the most widely used adsorbent thanks to its high surface area, pore structure [15,16] and low price [17]. However, there is increasing interest in developing new adsorbents as an alternative to activated carbon because of its humidity dependence [18] and the difficulty in regenerating it [19].…”

Adsorption characteristics of methyl mercaptan, dimethyl disulfide, and trimethylamine on coconut-based activated carbons modified with acid and base

“…Under the same condition, the breakthrough time of DMDS was 6 times longer than that of MM and TMA. This could be due to the difference of affinity between activated carbon and adsorbate and the differences of molecular weight, molecular volume and vapor pressure of adsorbates as shown in Table 1 [14]. Because the activated carbon has nonpolarity, the adsorption ability of DMDS with nonpolar nature is higher than those of MM and TMA with polar nature (Table 1).…”

“…As the concentrations of the oxygen groups are increased, the chemical properties of active sites on the surface changed [11,12]. Lee et al [13,14] compared the adsorption intensity and polarity differences between adsorbate and activated carbons. Lee et al [15] also studied the adsorption characteristics of benzene and acetone vapor according to acidity and basicity changes after modifications to compare the adsorption ability according to chemical changes on the surface of activated carbon.…”