Adsorption equilibrium of solvent vapors on activated carbons

Volatile organic compounds adsorption onto neat and hybrid bacterial cellulose

“…Activated carbon exhibiting an excellent adsorption capacity, as effect of its large specific surface area and pore volume, is widely used as an adsorbent due to its low cost and great accessibility [2][3][4]6,10,12,14,16,18,20,22,23,25,28,29]. However, it is recognized that the activated carbon can present some disadvantages, e.g., inflammability, pore clogging, lower selectivity, inefficient regeneration [5,12,13,18,23,25,28].…”

“…VOCs abatement techniques can be divided into two categories, i.e., destructive (thermal, catalytic, and photocatalytic oxidation, bio-filtration) and recuperative (adsorption, absorption, condensation, membrane separation) [1,8,9]. Adsorption onto porous materials is a well-established, highly selective, energy efficient, and relatively inexpensive technique employed for the removal and recovery of VOCs from air, especially at a low concentration [1,3,5,6,[10][11][12][13][14][15][16][17][18]. Porous materials having large specific surface area and pore volume, including activated carbon and its derivatives [1][2][3][4]6,10,14,16,[19][20][21][22], alumina [18], natural clay [18], natural and modified zeolites [11,[23][24][25][26], are the most frequently applied adsorbents.…”

“…In this context, a control and a diminishing of HEX and IPA emissions from atmospheric air is of great interest. The removal of these VOCs species from polluted air streams using various adsorbents, e.g., activated carbon [2][3][4]6,10,14,20,22], mesoporous silica materials [26], polymeric resins [5], MOF and MOF-based composites [15], has been extensively studied.…”

“…Volatile organic compounds (VOCs) are air pollutants mainly emanated from the use of solvents in industrial and domestic applications as well as from the storage, distribution, and use of fossil fuels [1][2][3][4][5][6][7]. They may be odorous species, precursors of photochemical oxidants, and some of them are very detrimental for human and environment, even at a very low concentration level (ppm or sub-ppm).…”

Adsorption isotherms of 2,2,4-trimethylpentane and toluene vapors on hydrocarbon adsorber and light-off catalyst

“…2,2,4-Trimethylpentane and toluene vapors were chosen as adsorbates. Equilibrium experiments were carried out at three different temperatures of 303.15, 323.15, and 343.15 K. Adsorption data of each hydrocarbon was fitted to the well-known isotherms such as the Langmuir equation and the Freundlich equation [5,6]. Furthermore, the surface energetic heterogeneity of the adsorbents was evaluated using the isosteric heat of adsorption based on the ClausiusClapeyron equation.…”