Structural elucidation of hydro-products from hydrothermal carbonization of loblolly pine at different temperatures using NMR techniques

摘要

Structural properties and functional groups variations of hydro-products from hydrothermal carbonization (HTC) of loblolly pine at 180, 200, 220, 240 and 260 degrees C were investigated in this paper. More than 50% fixed carbon content can be obtained in solid products, indicating HTC is a valued carbon sequestration method. The Higher Heating Value (HHV) of the solid residue from 260 degrees C reached 30.74 MJ/kg, nearly 1.53 times that of untreated pine. Higher temperature benefit for the generation of condensed aromatic structure especially at. 240 degrees C, while 260 degrees C more conductive to etherification and aryl condensation substitution reaction.