Adsorption Isotherms of Water, Propan-2-ol, and Methylbenzene Vapors on Grade 03 Silica Gel, Sorbonorit 4 Activated Carbon, and HiSiv 3000 Zeolite

Abstract

This work reports adsorption isotherms of water, propan-2-ol, and methylbenzene vapors on three commercial adsorbents: grade 03 silica gel, Sorbonorit 4 activated carbon, and HiSiv 3000 zeolite. The adsorption isotherms were measured at (293.15, 313.15, 333.15, 348.15, 373.15, 393.15, and 413.15) K and pressures up to 2340 Pa for water, 4460 Pa for propan-2-ol, and 2910 Pa for methylbenzene. Additionally measurements for the water vapor−Sorbonorit 4 system at (293.15, 303.15, 313.15, and 323.15) K and relative humidity up to 95% (at 323.15 K up to 70%) were made because of different type of adsorption isotherm. The measurements were carried out by intelligent gravimetric analyzer. The data obtained from measurements were correlated with selected multitemperature adsorption isotherms equations: Toth, Langmuir−Freundlich, and Dubinin−Astakhov.

Enthalpy of isopropanol adsorption on zeolite

“…In the case of subsequent layers of the adsorbent, it can be assumed that the heat of adsorption of subsequent layers, with the exception of the fi rst one, is the same. On the basis of the assumptions and transformations, we obtain the equation: (8) where: K 1 is the equilibrium constant for the reaction (1), while the K 2 parameter refers to the subsequent layers of the adsorbent.…”

Adsorption of propan-1-ol vapour on Sorbonorit 4 activated carbon – equilibrium and dynamic studies

“…The lowest explosive limit for 1PN is 2.1%. It is used in making cosmetics, skin and hair preparations, pharmaceuticals, perfumes, lacquer formulations, dye solutions, antifreezes, rubbing alcohols, soaps, windows cleaner and other cleaning products 9 . Owing to the excellent solubility in water and most organic liquids, it is used as intermediates or solvents 1 .…”

Modeling of multicomponent and multitemperature adsorption equilibria of water vapor and organic compounds on activated carbons

“…Then, the sample was degassed and measurements were made for next temperature. Details of the system IGA are described in our previous work (Nastaj and Aleksandrzak, 2013).…”

“…Unfortunately, research on pure water adsorption equilibrium is limited, in contrary to adsorption equilibrium of pure organic compounds (Chiang et al., 2001a, 2001b; Qi et al, 2006; Gironi and Piemonte, 2011; Lashaki et al., 2012; Nastaj and Chybowska, 2004; Ramirez et al., 2005; Wang et al., 2004, 2005). In literature, there are not many adsorption equilibrium data, especially on commonly used adsorbents such as various kinds of activated carbons (Kim et al., 2005; Nastaj and Aleksandrzak, 2013; Qi and LeVan, 2005a,b; Qi et al, 2006). There are several models describing pure water adsorption equilibrium (Do, 1998; Ladshaw et al., 2015; Qi and LeVan, 2005a,b; Ribeiro et al., 2008; Talu and Meunier, 1996; Tien, 1994).…”