Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

High Surface Area Mesoporous Activated Carbon from Hemp Bast Fibre Using Hydrothermal Processing

Md Zakir Hossain
* ORCID logo ,
Wei Wu
,
William Z. Xu
,
Muhammad B.I. Chowdhury
,
Anil Kumar Jhawar
,
Devin Machin
,
Paul A Charpentier
*
Version 1 : Received: 27 April 2018 / Approved: 28 April 2018 / Online: 28 April 2018 (12:29:14 CEST)

A peer-reviewed article of this Preprint also exists.

Hossain, M.Z.; Wu, W.; Xu, W.Z.; Chowdhury, M.B.I.; Jhawar, A.K.; Machin, D.; Charpentier, P.A. High-Surface-Area Mesoporous Activated Carbon from Hemp Bast Fiber Using Hydrothermal Processing. C 2018, 4, 38. Hossain, M.Z.; Wu, W.; Xu, W.Z.; Chowdhury, M.B.I.; Jhawar, A.K.; Machin, D.; Charpentier, P.A. High-Surface-Area Mesoporous Activated Carbon from Hemp Bast Fiber Using Hydrothermal Processing. C 2018, 4, 38.

Abstract

Synthesis of activated carbon from waste biomass is of current interest towards sustainability. The properties of biomass derived activated carbon largely depends on the carbonization process. This study reports preparing extremel high surface area mesoporous activated carbon from hemp bast fibre using hydrothermal processing. Processing in hot water (390-500oC), then activation using KOH and NaOH was investigated at different loading ratios. The described approach was found to enhance the mesoporosity (centered at 3.0 to 4.5 nm) of the hemp derived activated carbon (HAC) from activation (confirmed by BJH pore size distribution and TEM imaging). BET results showed that the product has an extremely high surface area (2425 m2/g) while the surface functional groups (-OH, COOH, C=C/C-C) were confirmed and quantified by XPS and FTIR results. Increasing KOH concentration was found to enhance the surface area with an optimum biochar to KOH ratio of 1:3. The crystallite domain size of HAC was determined using Raman spectroscopy of different wavelengths. The procedure described in this study is an environmentally friendly scalable route for the mass production of activated carbon using hemp fiber.

Keywords

hemp bast fibre; hydrothermal processing; KOH activation; activated carbon

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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