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Green and simple approach for low-cost bioproducts preparation and CO2 capture

Dur�n-Jim�nez, Gabriela; Kostas, Emily T.; Stevens, Lee A.; Meredith, Will; Erans, Maria; Hern�ndez-Montoya, Virginia; Buttress, Adam; Uguna, Clement N.; Binner, Eleanor

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Emily T. Kostas

Senior Research Fellow

Maria Erans

Virginia Hern�ndez-Montoya


This study has demonstrated, for the first time, a simple, fast and flexible microwave processing method for the simultaneous preparation of bio-products (bio-oil, bio-gas and biochar) using a methodology that avoids any form of catalyst or chemical activation. The dielectric properties of biomass and physicochemical characterisation such as TGA, elemental and proximate analysis, XRD, SEM/EDX and textural properties, showed that 8 kJ g−1 of microwave energy can produce superior biochars for applications in CO2 capture. The maximum CO2 uptake capacity for biochar produced was 2.5 mmol g−1 and 2.0 mmol g−1 at 0 and 25 °C and 1 bar, which and also exhibited high gas selectivity compared with N2, fast kinetics of adsorption (95%) after 20 cycles. GC-MS analysis of generated bio-oil products revealed that higher microwave energies (>8 kJ g−1) significantly enhanced the amount of bio-oil produced (39%) and specifically the formation of levoglucosan, furfural and phenolics compounds, and bio-gas analysis identified trace levels of H2 and CH4. The results from this study confirm a green, inexpensive and efficient approach for biomass valorisation which can easily be embedded within bio-refinery process, and also demonstrates the potential of biochars for post-combustion CO2 uptake.

Journal Article Type Article
Acceptance Date Apr 5, 2021
Online Publication Date Apr 15, 2021
Publication Date Sep 1, 2021
Deposit Date Jun 22, 2021
Publicly Available Date Apr 16, 2022
Journal Chemosphere
Print ISSN 0045-6535
Electronic ISSN 1879-1298
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 279
Article Number 130512
Keywords General Chemistry; Environmental Chemistry; General Medicine
Public URL
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