Abstract
Lignocellulosic materials have great potential to be valorized into new products. Flax by-products such as powder and short fibers are used in the present study to identify plausible potential applications for the products obtained from their hydrothermal treatment. The as-received industrial flax by-products are subjected to hydrothermal carbonization (HTC) in a wide range of severity, an operating parameter combining time and temperature. In this way, the yield and characteristics of the resulting HTC products: hydrochars, carbon quantum dots (CQDs) and organics such as 5-hydroxymethylfurfural (5-HMF) and furfural (FU), are determined. Likewise, pyrolysis of the hydrochars and the starting flax by-products at 900 °C is also carried out, leading to carbon materials with developed surface areas, higher than 950 m2/g, and CO2 capture values of up to 4.8 mmol/g at 1 bar and 0 °C. In the overall process, severities above 4.9 were found to be optimal in terms of higher calorific value (around 27 MJ/kg) of the obtained hydrochars, production of organic products (0.22 and 0.06 g/L of 5-HMF and FU, respectively), photoluminescence quantum yield of the CQDs fraction (4.7%) and CO2 capture (up to 4.8 mmol/g) by the hydrochar-derived carbons.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
