Activated carbon microspheres derived from hydrothermally treated mango seed shells for acetone vapor removal
- PDF / 1,689,882 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 77 Downloads / 201 Views
Carbon Letters https://doi.org/10.1007/s42823-020-00184-4
ORIGINAL ARTICLE
Activated carbon microspheres derived from hydrothermally treated mango seed shells for acetone vapor removal Robson C. de Andrade1 · Rodrigo S. Gonzaga Menezes1 · Raildo A. Fiuza‑Jr1,2 · Heloysa Martins Carvalho Andrade1,2 Received: 26 April 2020 / Revised: 19 June 2020 / Accepted: 7 September 2020 © Korean Carbon Society 2020
Abstract 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-first order kinetics and both external and intraparticle transport contributed for the overall process. Highly efficient and stable acetone vapor removal was observed over the activated carbons after five cycles. Keywords Mango fruit waste valorization · Hydrochar · Activated carbon · Volatile organic compound (VOC) · Acetone · Adsorption
1 Introduction Mangoes are native from South Asia and are known as the national fruit of India, Pakistan and Philippines, but they are presently cultivated in several countries worldwide, mainly in tropical and subtropical climates. This is the second tropical crop and Brazil is one of the largest producers of mango Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42823-020-00184-4) contains supplementary material, which is available to authorized users. * Heloysa Martins Carvalho Andrade [email protected] 1
Laboratório de Catálise e Materiais (LABCAT), Instituto de Química, Departamento de Química Geral e Inorgânica, Universidade Federal da Bahia, R. Barão de Jeremoabo, s/n, Campus de Ondina, Salvador, Bahia 40170‑280, Brazil
Centro Interdisciplinar de Energia e Ambiente (CIENAM), Universidade Federal da Bahia, R. Barão de Jeremoabo, s/n, Campus de Ondina, Salvador, Bahia 40170‑280, Brazil
2
fruits, mainly of Tommy, Atkins, Haden, Palmer, Keitt and some Brazilian varieties [1, 2]. Mango fruit is largely consumed in different ways but the major wastes, the seed and the peel, may represent
Data Loading...
