Enhanced microwave assisted pyrolysis of waste rice straw through lipid extraction with supercritical carbon dioxide.

ABSTRACT: A combination of supercritical carbon dioxide (scCO₂) extraction and microwave-assisted pyrolysis (MAP) have been investigated for the valorisation of waste rice straw. ScCO₂ extraction of rice straw led to a 0.7% dry weight yield of lipophilic molecules, at elevated temperatures of 65 °C and pressures of 400 bar. Lipid compositions (fatty acids, fatty alcohol, fatty aldehydes, steroid ketones, phytosterols, n-alkanes and wax esters) of the waxes obtained by scCO₂ were comparable to those obtained Soxhlet extraction using the potentially toxic solvent n-hexane. ScCO₂ extraction positively influenced the pyrolysis heating rate, with a rate of 420 K min^-1 for particles of 500-2000 μm, compared to 240 K min^-1 for

SUBMITTER: Sikhom C 

PROVIDER: S-EPMC10758762 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature