Separation of CO 2 in a Solid Waste Management Incineration Facility Using Activated Carbon Derived from Pine Sawdust

Inés Durán, Fernando Rubiera and Covadonga Pevida
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Inés Durán: Instituto Nacional del Carbón, INCAR-CSIC, c/Francisco Pintado Fe 26, 33011 Oviedo, Spain
Fernando Rubiera: Instituto Nacional del Carbón, INCAR-CSIC, c/Francisco Pintado Fe 26, 33011 Oviedo, Spain
Covadonga Pevida: Instituto Nacional del Carbón, INCAR-CSIC, c/Francisco Pintado Fe 26, 33011 Oviedo, Spain

Energies, 2017, vol. 10, issue 6, 1-20

Abstract: The selective separation of CO 2 from gas mixtures representative of flue gas generated in waste incineration systems is studied on two activated carbons obtained from pine sawdust and compared to a commercial activated carbon. Dynamic adsorption experiments were conducted in a fixed-bed adsorption column using a binary mixture (N 2 /CO 2 ) with a composition representative of incineration streams at temperatures from 30 to 70 °C. The adsorption behavior of humid mixtures (N 2 /CO 2 /H 2 O) was also evaluated in order to assess the influence of water vapor in CO 2 adsorption at different relative humidity in the feed gas: 22% and 60%. Moreover, CO 2 adsorption was studied in less favorable conditions, i.e., departing from a bed initially saturated with H 2 O. In addition, the effect of CO 2 on H 2 O adsorption was examined. Experimental results showed that the CO 2 adsorption capacity can be reduced significantly by the adsorption of H 2 O (up to 60% at high relative humidity conditions). On the other hand, the breakthrough tests over the adsorbent initially saturated with water vapor indicated that H 2 O is little affected by CO 2 adsorption. The experimental results pointed out the biomass based carbons as best candidates for CO 2 separation under incineration flue gas conditions.

Keywords: activated carbon; CO 2 capture; incineration; breakthrough curve; water vapor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
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