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Title: Preparation and characterization of flax, hemp and sisal fiber-derived mesoporous activated carbon adsorbents

Abstract

The first aim of this study was to investigate mesoporous activated carbon adsorbents from sisal, hemp, and flax fibers by cost-effective methods. Fibers were impregnated with low concentration (20 wt.%) phosphoric acid. Carbonization temperatures were defined by thermal analysis. Bast fibers (hemp, flax) decompose at lower temperatures (419.36°C, 434.96°C) than leaf fibers (sisal, 512.92°C). The second aim was to compare bast and leaf fibers-derived activated carbon adsorbents by determining physical adsorption properties, chemical compositions, scanning electron microscope, and Fourier transform infrared spectroscopy. Results showed that natural fibers have good candidates to prepare mesoporous activated carbon adsorbents with high surface area (1186–1359 m2/g), high mesopore percentage (60–72%), and high C content (80–86%). Even though leaf-derived activated carbon developed more mesoporous structure (72%), bast-derived activated carbons provided higher surface areas (S hemp = 1359 m 2/g; S flax = 1257 m 2/g) and C content. Fourier transform infrared spectra for bast fibers-derived activated carbon adsorbents were quite similar while leaf fiber-derived activated carbon adsorbent had a different spectrum.

Authors:
 [1];  [2];  [3];  [4]
  1. Univ. of Alabama, Birmingham, AL (United States). Center for Community Outreach Development (CORD), College of Arts and Sciences
  2. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace and Biomedical Engineering, Dept. of Materials Science & Engineering
  3. Univ. of Alabama, Birmingham, AL (United States). Dept. of Environmental Health Sciences, School of Public Health
  4. East Carolina Univ., Greenville, NC (United States). Environmental Health Sciences Program, Dept. of Health Education and Promotion
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1490715
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Adsorption Science and Technology
Additional Journal Information:
Journal Volume: 36; Journal Issue: 1-2; Journal ID: ISSN 0263-6174
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Natural fibers; natural fiber-derived activated carbon adsorbents; chemical activation; mesoporous activated carbon adsorbents; physical adsorption

Citation Formats

Dizbay onat, Melike, Vaidya, Uday Kumar, Lungu, Claudiu, and Balanay, Jo Anne. Preparation and characterization of flax, hemp and sisal fiber-derived mesoporous activated carbon adsorbents. United States: N. p., 2017. Web. doi:10.1177/0263617417700635.
Dizbay onat, Melike, Vaidya, Uday Kumar, Lungu, Claudiu, & Balanay, Jo Anne. Preparation and characterization of flax, hemp and sisal fiber-derived mesoporous activated carbon adsorbents. United States. doi:10.1177/0263617417700635.
Dizbay onat, Melike, Vaidya, Uday Kumar, Lungu, Claudiu, and Balanay, Jo Anne. Thu . "Preparation and characterization of flax, hemp and sisal fiber-derived mesoporous activated carbon adsorbents". United States. doi:10.1177/0263617417700635. https://www.osti.gov/servlets/purl/1490715.
@article{osti_1490715,
title = {Preparation and characterization of flax, hemp and sisal fiber-derived mesoporous activated carbon adsorbents},
author = {Dizbay onat, Melike and Vaidya, Uday Kumar and Lungu, Claudiu and Balanay, Jo Anne},
abstractNote = {The first aim of this study was to investigate mesoporous activated carbon adsorbents from sisal, hemp, and flax fibers by cost-effective methods. Fibers were impregnated with low concentration (20 wt.%) phosphoric acid. Carbonization temperatures were defined by thermal analysis. Bast fibers (hemp, flax) decompose at lower temperatures (419.36°C, 434.96°C) than leaf fibers (sisal, 512.92°C). The second aim was to compare bast and leaf fibers-derived activated carbon adsorbents by determining physical adsorption properties, chemical compositions, scanning electron microscope, and Fourier transform infrared spectroscopy. Results showed that natural fibers have good candidates to prepare mesoporous activated carbon adsorbents with high surface area (1186–1359 m2/g), high mesopore percentage (60–72%), and high C content (80–86%). Even though leaf-derived activated carbon developed more mesoporous structure (72%), bast-derived activated carbons provided higher surface areas (Shemp = 1359 m2/g; Sflax = 1257 m2/g) and C content. Fourier transform infrared spectra for bast fibers-derived activated carbon adsorbents were quite similar while leaf fiber-derived activated carbon adsorbent had a different spectrum.},
doi = {10.1177/0263617417700635},
journal = {Adsorption Science and Technology},
number = 1-2,
volume = 36,
place = {United States},
year = {2017},
month = {4}
}

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Figure 1 Figure 1: Schematic diagram of horizontal tube furnace setup.

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