Synthesis of Activated Carbons by Thermal Treatments of Agricultural Wastes for CO2 Capture from Flue Gas. Issue 4 (3rd May 2016)

• Record Type: Journal Article
• Authors: Erto, A.; Tsyntsarski, B.; Balsamo, M.; Budinova, T.; Lancia, A.; Petrova, B.; Petrov, N.
• Is Part Of: Combustion science and technology. Volume 188:Issue 4/5(2016)
• Page Start: 581
• Page End: 593
• Publication Date: 2016-05-03
• Subjects: Activated carbon -- Adsorbent regeneration -- Agricultural wastes -- CO2 adsorption; Combustion -- Periodicals; Combustion engineering -- Periodicals; 541.36105
• DOI: 10.1080/00102202.2016.1138809
• Languages: English
• ISSNs: 0010-2202

Abstract

ABSTRACT: Activated carbons (AC) were synthesized by a pyrolysis process and activation with water vapor of agricultural wastes, namely, apricot stones, peach stones, and olive stones, for CO2 capture from a simulated flue gas. Kinetic and thermodynamic adsorption tests were carried out in a lab-scale fixed-bed column under operating conditions typical of a flue gas (i.e., P = 1 atm, CO2 = 3–30%, T = 30°C). Experimental results showed that the AC derived from olive stones is characterized by a slightly faster saturation, due to a higher contribution of meso-macropores, while the AC derived from the apricot stones had the highest adsorption capacity, likely ascribed to a higher micropore volume and a narrower pore size distribution. Regeneration studies conducted on the AC derived from apricot stones showed that CO2 adsorption is a reversible process and that the time to achieve a desired CO2 recovery percentage is mainly controlled by temperature and, at less extent, by desorbing agent flow rate.