Abstract
Predictive correlations between reactions occurring in the gas, liquid, and solid phases are necessary to economically utilize the thermochemical conversion of agricultural wastes impacting the food, water, and energy nexus. On the basis of an empirical mass balance (99.7%), this study established the overall reaction stoichiometry (C33.42H45.95O20.26N0.22S0.14 = 0.50C20.08H57.21O22.46N0.20S0.22 + 1.72H2O + 0.10H2 + 1.07CH4 + 0.02C2H4 + 0.06C2H6 + 2.21CO2 + 2.05CO + 0.28C63.75H32.47O3.23N0.43S0.12) and energy balance for the slow pyrolysis of lignocellulosic pecan shell waste biomass at 10 °C min–1 up to 500 °C. In situ thermogravimetry–gas chromatography and diffuse reflectance infrared fourier transform spectroscopy (DRIFTs) were used to link the gas-, liquid-, and solid-phase nonisothermal reaction kinetics. Gaussian fit-based deconvolution of individual gaseous product formation rates (hydrogen, methane, carbon monoxide, carbon dioxide, ethylene, and ethane in mg min–1) suggested the relationships bet...
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