Abstract
Herein, the co-pyrolysis reaction characteristics of corn straw (CS) and bituminous coal in the presence of ilmenite oxygen carriers (OCs) are investigated via thermogravimetry coupled with mass spectrometry. The results reveal that the participation of OCs weakens the devolatilization intensity of co-pyrolysis. When the CS blending ratio is < 50%, the mixed fuel exhibits positive synergistic effects. The fitting results according to the Coats-Redfern integral method show that the solid-solid interaction between OCs and coke changes the reaction kinetics, enhancing the co-pyrolysis reactivity at the high-temperature zone (750–950 °C). The synergistic effect is most prominent at 30% CS blending ratio with co-pyrolysis activation energy being in the range 26.35–40.57 kJ·mol–1.
Published Version
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