Cited by 17Carbon Dioxide Capture TechnologiesAdsorption and biosorption for pollutant removalThermochemical Biomass Conversion Processes

Multifunctional Loblolly Pine-Derived Superactivated Hydrochar: Effect of Hydrothermal Carbonization on Hydrogen and Electron Storage with Carbon Dioxide and Dye Removal

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Sultana, Al Ibtida, Chambers, Cadianne, Ahmed, Muzammil M. N., Pathirathna, Pavithra, Reza, Toufiq·2022·Nanomaterials

Abstract

Pore modulation via hydrothermal carbonization (HTC) needs investigation due to its crucial effect on surface that influences its multirole utilization of such ultraporous sorbents in applications of energy storage- hydrogen and capacitive- as well as for pollutant abatement- carbon capture and dye removal. Hence, loblolly pine was hydrothermally carbonized followed by KOH activation to synthesize superactivated hydrochars (SAH). The resulting SAHs had specific surface area (SSA) 1462–1703 m2/g, total pore (TPV) and micropore volume (MPV) of 0.62–0.78 cm3/g and 0.33–0.49 cm3/g, respectively. The SAHs exhibit excellent multifunctional performance with remarkably high atmospheric CO2 capture of 145.2 mg/g and high pressure cryogenic H2 storage of 54.9 mg/g. The fabricated supercapacitor displayed substantial specific capacitance value of maximum 47.2 Fg−1 at 1 A g−1 in 6 M KOH and highest MB dye removal of 719.4 mg/g. Higher HTC temperature resulted in increased surface porosity as higher SSA, TPV benefitted H2 storage and MB dye removal while superior MPV favored CO2 capture. Moderate HTC temperature ensured higher mesopore-to-macropore volume ratio favoring electrochemical performance. Isotherm modelling of the adsorbates was compared using models: Langmuir, Freundlich, Langmuir- Freundlich and Temkin.

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Crossref · 10.3390/nano12203575

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  • The hydrochar predominantly comprises aromatic and aliphatic hydrocarbons, evident in a broad diffraction peak within the 15-21° range characteristic of amorphous carbon.

    “The hydrochar predominantly comprises aromatic and aliphatic hydrocarbons61, evident in a broad diffraction peak within the 15–21° range, characteristic of the amorphous carbon diffraction pattern62.”

    From Efficient CO2 adsorption by deoiled flaxseed hydrochar (2024) · cites this paper as [62]

    Section 3.1 reports the broad 15–21° peak characteristic of amorphous carbon, but only for hydrochar prepared at 260 °C; hydrochars prepared at 180 and 220 °C retained cellulose-related peaks. The aromatic-and-aliphatic composition statement is attached to a different citation in the citing sentence, so this verdict addresses the diffraction claim. (LLM, conf=0.88)

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  1. [91]Smith J.M. Chemical Engineering Kinetics, 3rd Edition (McGraw-Hill Chemical Engineerin g Series) McGraw-Hill New York, NY, USA 1981 978-0-07-058710-6

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Authors
Sultana, A. I., Chambers, C., Ahmed, M. M. N., Pathirathna, P., & Reza, T.
Affiliations
  • Florida Institute of Technology (US)
  • Department of Biomedical and Chemical Engineering and Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA
Venue
Nanomaterials
Publisher
MDPI AG
Published
2022-10-12
Volume
12
Issue
20
Pages
3575
ISSN
2079-4991 (ISSN-L)
OpenAlex
W4304775508
Cited by
17
References
107
Citations by year
2026: 3 · 2025: 2 · 2024: 6 · 2023: 5 · 2022: 1
FWCI
1.32
Type
journal article
Language
en
Open access
Locations
  • Nanomaterials (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
United States Department of Agriculture (2019-67019-31594)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
Keywords
hydrothermal carbonization, Pinus taeda, KOH activation, hydrogen storage, CO2 capture, supercapacitors, pore structure, microporosity, adsorption isotherms, biomass-derived carbon

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