Title: Synthesis of hierarchical porous carbon from waste Camellia oleifera shell with high carbon dioxide adsorption capacity

Authors: Chao Chen; Samiran Bhattacharjee

Addresses: School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong Province 510006, China ' Centre for Advanced Research in Sciences, University of Dhaka, Dhaka 1000, Bangladesh

Abstract: A porous carbon material with hierarchical micropore-mesopore structure was prepared from waste Camellia oleifera shell by a simple ZnCl₂ chemical activation technique. The surface morphology and textural properties of prepared carbon materials were characterised by scanning electron microscope (SEM) and N₂ adsorption/desorption measurement. The carbon product exhibits high specific surface area and pore volume of 2,933 m²/g and 1.59 cm³/g, respectively, which are the highest values among carbon materials prepared from various biomass materials reported to date. This carbon material exhibited a CO₂ uptake of 134 mg/g at 25°C and 1 atm pressure, which is one of the highest CO₂ capture capacities among carbon materials prepared from a variety of biomass materials reported so far under the same experimental conditions. The adsorbent regeneration can be achieved by a facile argon purge and the material showed stable performance in 5 CO₂ consecutive adsorption-desorption test cycles.

Keywords: Camellia oleifera shell; chemical activation technique; porous carbon; hierarchical pore structure; CO₂ adsorption.

DOI: 10.1504/IJGW.2020.111519

International Journal of Global Warming, 2020 Vol.22 No.4, pp.448 - 458

Received: 03 Jan 2020
Accepted: 03 Jun 2020
Published online: 30 Nov 2020 *

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