Adsorption Isotherms of VOCs onto an Activated Carbon Monolith:  Experimental Measurement and Correlation with Different Models

Abstract

A new material, activated carbon monolith, can be used as an adsorbent to remove volatile organic compounds (VOCs). Vapor-solid adsorption isotherms of three VOCs (toluene, 1-butanol, and ethyl acetate) on an activated carbon monolith were measured at: 20 °C, 60 °C, 100 °C, and 140 °C using a microbalance. The experimental data were correlated with the following adsorption isotherm models: Langmuir, Freundlich, Langmuir-Freundlich, and Toth equations. The Langmuir-Freundlich and Toth equations provided good fits to the experimental data.

Comparative study of carbon nanotubes and granular activated carbon: Physicochemical properties and adsorption capacities

“…Bituminous coal is the most industrial grade carbon used for the air and water applications (Cooper and Alley, 1994). Activated carbon can be classified as powdered activated carbon (PAC), forms of activated carbon fibers (Bansal et al, 1988(Bansal et al, , 2005, activated carbon monoliths (Luo et al, 2002(Luo et al, , 2006, activated carbon fiber cloths Ramirez et al, 2004) and granular activated carbon (GAC).…”

Structured adsorbents in gas separation processes

“…A number of studies have reported monolithic adsorbents for the removal of volatile organic compounds (VOCs) from air [23,[34][35][36][37][38]. Shah et al [39] studied the removal of volatile organic compounds (VOCs) from air using monoliths and performed simulations for comparing the performance of their novel adsorbents with a packed bed of pellets.…”

“…Yu et al [35] used activated carbon monoliths for VOCs removal using electrothermal desorption method. Yu et al [105,106] investigated the electrothermal swing adsorption (ESA) process with an activated carbon monolith (400 cpsi) as adsorbent for adsorption of toluene vapours.…”

Optimum structured adsorbents for gas separation processes

“…Parallel channel monolithic structures with controllable shape, cell density and wall thickness have been reported for their use in adsorptive gas separation systems (Kodama et al, 1993;Gadkaree, 1997;Li et al, 1998;Lee et al, 2000;Yu et al, 2002;Yates et al, 2003). The main advantage of such configurations resides in their low pressure drop and higher mass transfer rates.…”