Pyrolysis of tea and coffee wastes: effect of physicochemical properties on kinetic and thermodynamic characteristics.

ABSTRACT: Physicochemical properties, kinetic pyrolysis and thermodynamic study of spent green tea, pure spent coffee grounds, spent coffee grounds blended with 50% torrefied barley and coffee husk were experimentally investigated using thermogravimetric analysis under an inert atmosphere to evaluate their thermochemical application. Five isoconversional methods were applied to determine effective activation energy (E _a) of the pyrolysis processes. All methods showed good agreement by determining fluctuating E _a values (150-500 kJ mol^-1). Complex E _a profiles with conversion were divided into four stages corresponding to thermal degradation of main biomass constituents (extractives, hemicellulose, cellulose and lignin), indicating that

SUBMITTER: Ben Abdallah A 

PROVIDER: S-EPMC9911335 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature