Kinetics of hydrocarbon adsorption on activated carbon and silica gel

Adsorption dynamics of a layered bed PSA for H2recovery from coke oven gas

“…Assuming thermal equilibrium between fluid and particles, the energy balance for gas and solid phases is given by where K , is the effective axial thermal conductivity (Suzuki, 1990;Malek and Farooq, 1997).…”

Hydrogen purification from refinery fuel gas by pressure swing adsorption

“…This choice was also found to provide a suitable compromise between minimizing the mag- 'Malek (1996). 'Malek and Farooq (1997a).…”

“…As shown in Malek and Farooq (1997a) and Malek (1996), for the adsorption of C,-C, in activated carbon adsorbent, D,,,, = 0.0085 cm2/s, while for the same in silica gel adsorbent, D,,,,, = 0.0018 cm2/s.…”

Modelling the Breakthrough Curves Obtained from the Adsorption of Propene onto Microporous Inorganic Solids

“…Several complex theoretical models have been proposed in the literature (Tien 1994;Brosillon et al 2001;Malek and Farooq 1997;Delage et al 2000;Pre et al 2002;Sircar and Hufton 2000) for simulating breakthrough curves. In this paper, the LDF model [equation (3)] linked to the mass balance in a portion of the bed [equation (2)] and the Langmuir model [equation (9)] have been applied for describing the equilibrium experimental data.…”

“…Thus, Brosillon et al (2001) investigated the kinetic performance of zeolites for VOC (n-heptane, n-octane, acetone and methyl ethyl ketone) abatement and observed that the effective diffusivity was constant regardless of the nature and amount of VOC adsorbed. Similarly, Malek and Farooq (1997) studied the kinetic behaviour of small VOC molecules (methane, ethane and propane) in their adsorption onto activated carbon and silica gel, and found that adsorbate transport inside the adsorbent occurred essentially by Knudsen and surface flow. However, none of these authors focused on modelling the adsorption of HCs onto zeolites and the relationship between the kinetic and equilibrium parameters and the structural characteristics of the adsorbent.…”