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- 저자 : Menezes Rodrigo S. Gonzaga (검색결과 1 건)
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de Andrade Robson C.,Menezes Rodrigo S. Gonzaga,Fiuza-Jr Raildo A.,Andrade Heloysa Martins Carvalho 한국탄소학회 2021 Carbon Letters Vol.31 No.4
Mango fruit seed shells were used as starting materials to produce activated carbons for the capture of acetone, a typical volatile organic compound (VOC), from gaseous streams. This fruit waste presents high volatiles and low ashes contents, as expected for the lignocelulosic materials commonly used for the preparation of activated carbons. The starting material was hydrothermally treated at 180 or 250 °C for 5 h and the obtained hydrochars were activated with KOH solutions. The carbon samples were characterized by SEM, EDX, TG/DTA, Raman spectroscopy and textural analysis by physisorption. The adsorption capacity and adsorption cycles were investigated by TG. The hydrochars presented spherical morphology and the activated carbons derived from them presented heterogeneous micropore structures allowing to high capacity of acetone vapor removal, namely 472 mg/g, at 30 °C and 363 mg/g, at 50 °C. The results indicate that the adsorption capacity of the activated carbons is directly related to their Dubinin-Astakhov micropore surface areas and microporous volumes determined by NLDFT. The adsorption of acetone vapor showed a pseudo-frst order kinetics and both external and intraparticle transport contributed for the overall process. Highly efcient and stable acetone vapor removal was observed over the activated carbons after fve cycles.
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