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.