Adsorption and electrothermal desorption of VOCs and siloxanes onto activated carbon fiber cloth for biogas purification - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Energy & Fuels Année : 2014

Adsorption and electrothermal desorption of VOCs and siloxanes onto activated carbon fiber cloth for biogas purification

Résumé

Although biogases mainly consist of a mixture of carbon dioxide and methane, traces of volatile organic compounds are present and these undesirable compounds must be removed during the purification process. Adsorption onto activated carbon fiber cloth was investigated and, in particular, the feasibility of electrothermal desorption. Five compounds were chosen and their desorption was assessed by monitoring the electric resistance of the material as a function of temperature. The results were confirmed by thermogravimetric analysis. Toluene, dichloromethane, and isopropanol were entirely desorbed at 420 K whereas siloxane D4 and ethyl mercaptan (ethanethiol) were partially removed. These conclusions were confirmed by dynamic adsorption measurements. Cycles of adsorption followed by electrothermal desorption were first carried out for a single component (toluene). Although there was a loss of adsorption capacity between the first and second cycles, a steady performance was reached, shedding light on the complete reversibility of the adsorption of toluene. On the contrary, for the mixture of five organic compounds, a constant loss of adsorption capacity was measured after three cycles, which was attributed to the incomplete regeneration at 420 K of two organic compounds (ethanethiol and siloxane D4) from the ACFC from one cycle to another. The electrical consumption for the electrothermal desorption was highest at the beginning of the desorption and rapidly decreased as the temperature within the filter reached its setpoint. An average consumption was estimated at 1500 W per kilogram of activated carbon fiber cloth.
Fichier non déposé

Dates et versions

hal-00999378 , version 1 (03-06-2014)

Identifiants

Citer

Sylvain Giraudet, Benoit Boulinguiez, Pierre Le Cloirec. Adsorption and electrothermal desorption of VOCs and siloxanes onto activated carbon fiber cloth for biogas purification. Energy & Fuels, 2014, 28 (6), pp.3924-3932. ⟨10.1021/ef500600b⟩. ⟨hal-00999378⟩
130 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More