Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 9, Issue 15, Pages 5278-5287Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c08599
Keywords
supercritical extraction; surface; metal cations; Scots pine; Py-GC/MS; ToF-SIMS
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Funding
- FORMAS (CETEX project)
- Kempe Foundation
- Bjorn Wahlstroms
- Jernkontoret Stiftelsen
- Thailand Research Fund [RSA6280031]
- Khon Kaen University
- Materials Chemistry Research Center, Khon Kaen University
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Ministry of Higher Education, Science, Research and Innovation
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Supercritical extraction of biomass has a significant impact on the composition of Scots pine tree fractions, altering the surface concentration of water, lipids, and metals which subsequently influences the pyrolysis composition. The study demonstrates the remarkable influence of surface adsorbed metals on the pyrolysis products' composition, providing insights for a sustainable pretreatment method using ScCO2.
This research demonstrates that supercritical extraction of the biomass has a remarkable and complex influence on Scots pine tree fractions changing the surface concentration of water, lipids, and metals simultaneously. Surprisingly, this surface composition modification makes a considerable impact on the pyrolysis of the bulk biomass mechanism, leading to the alternation of the volatile and inorganic matter composition. The unique combination of time-of-flight secondary-ion mass spectrometry analysis and utilization of pyrolysis gas chromatography-mass spectrometry data on the thermal behavior of woody biomass demonstrates, for the first time, the extraordinary influence of surface adsorbed metals on the composition of pyrolysis products. ScCO2 could extract the surface metals in the form of fatty acid salts, demonstrating a sustainable and environmentally friendly pretreatment method for controlling the pyrolysis products.
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