Cited by 64Carbon Dioxide Capture TechnologiesThermochemical Biomass Conversion ProcessesAdsorption and biosorption for pollutant removal

Nitrogen Functionalized Biochar as a Renewable Adsorbent for Efficient CO2 Removal

Bamdad, Hanieh, Hawboldt, Kelly, MacQuarrie, Stephanie·2018·Energy & Fuels

Abstract

In this study, biochar was thermally and chemically (thermo-chemically) modified and compared to the unmodified parent char in carbon dioxide adsorption. The biochars were sourced from sawmill residues and produced via fast pyrolysis in an auger reactor. The biochar was chemically functionalized using two novel methods of amine functionalization: (i) nitration, followed by reduction, and (ii) condensation of aminopropyl triethoxysilane on the surface. The obtained outcomes indicated functionalization resulted in a reduction in the pore volume and surface area of the biochar. The biochars (unmodified and chemically modified) were thermally activated via air diluted with nitrogen at moderate 560 °C to determine if the adsorption properties could be enhanced. The thermally treated functionalized chars had a lower H:C ratio, higher surface area, micropore volume, and sufficient amount of nitrogen compared to the unmodified char. The thermally treated aminopropyl triethoxysilane char had the highest adsorption capacity of 3.7 mmol/g with 0.24 wt % nitrogen. Biochars sourced from residues demonstrated high efficiency of carbon dioxide removal, comparable to some synthesized adsorbents reported in the literature.

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Crossref · 10.1021/acs.energyfuels.8b03056

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Authors
Bamdad, H., Hawboldt, K., & MacQuarrie, S.
Affiliations
  • Memorial University of Newfoundland (CA)
  • Cape Breton University (CA)
Corresponding author
Bamdad, Hanieh
Venue
Energy & Fuels
Published
2018-10-30
Volume
32
Issue
11
Pages
11742-11748
ISSN
  • 0887-0624 (ISSN-L)
  • 1520-5029
OpenAlex
W2899320941
Cited by
64
References
32
Citations by year
2026: 5 · 2025: 9 · 2024: 6 · 2023: 11 · 2022: 10 · 2021: 8 · 2020: 11 · 2019: 4
FWCI
3.67
Type
journal article
Language
en
Open access
closed
Locations
Energy & Fuels (publishedVersion)
Funders
  • BioFuelNet Canada
  • Natural Sciences and Engineering Research Council of Canada
  • School of Graduate Studies, Memorial University of Newfoundland
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
Keywords
biochar, nitrogen functionalization, CO2 adsorption, CO2 capture, sawmill waste, fast pyrolysis, 3-aminopropyltriethoxysilane, thermal activation, amine functionalization, surface area, micropore volume, renewable adsorbents

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