Development of biomass derived highly porous fast adsorbents for post-combustion CO2 capture

Farooq Sher, Sania Zafar Iqbal, Shaima Albazzaz, Usman Ali, Daniela Andresa Mortari, Tazien Rashid

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    This study is carried out for a comparative screening of three groups of biomasses; soft or non-woody (peanut shell); intermediate woody (walnut shell) and hard woody (pine wood) for the development of adsorbents/activated carbons for post-combustion CO 2 capture (over N 2 balance). Three different groups of biomass residues are selected to study the role and nature of the material in adsorption and selection of the raw material for CO 2 adsorbents synthesis for future researches because of the hot issue of anthropogenic CO 2 emissions. The adsorption isotherms studied by the thermal gravimetric analyser (TGA) revealed that CO 2 adsorption capabilities are in the range of 2.53–3.92 mmol/g (over N 2 balance) at 25 °C. The newly synthesised activated carbons (ACs) exhibited a fast rate of adsorption as 41–94% in the initial 2 min. Porous surface development with catalytic KOH activation is seen clearly through SEM surface morphological analyses and mathematically confirmed from S BET ranges from 146.86 to 944.05 m 2/g. FTIR and XRD peaks verify the generation of basic or inorganic O 2-rich moieties that help in acidic CO 2 capture. It has also been observed from adsorption isotherms that the order of higher adsorption groups is as; peanut shell > pine wood > walnut shell, while the best activation mass ratio (sample/KOH) is 1:3. The synthesised low cost ACs with an amount of 1.93 US$ per kg production could help to overcome the environmental hazards and problems caused by CO 2 and biomass waste.

    Original languageEnglish
    Article number118506
    Number of pages118506
    Early online date7 Aug 2020
    Publication statusPublished - 15 Dec 2020

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Fuel. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Fuel, 282 (2020)] DOI: 10.1016/j.fuel.2020.118506

    © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercialNoDerivatives 4.0 International


    • Adsorption
    • Biomass waste
    • CO capture
    • Global warming
    • Green activated carbons
    • KOH-activation
    • Microporous materials

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Fuel Technology
    • Energy Engineering and Power Technology
    • Organic Chemistry


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