Investigation of coupling synergistic interaction during Co-pyrolysis of cabbage waste and tire waste

Abstract

This study proposed upgradation of products by co-pyrolyzing a hydrogen-deficient waste, such as cabbage waste, with a hydrogen-rich waste, such as tire trash, demonstrating full resource utilization in an economical way. The effect of tire waste (TW) on the pyrolysis of cabbage waste (CW) was investigated to determine the coupling synergistic interaction. Four distinct samples, CW, 25 T%W, 50%TW, and 75%TW, were prepared by changing the mass ratio of TW to CW. The activation energy was calculated by Ozawa-Flynn-Wall (OFW) and the Kissinger-Akahira-Sunose (KAS) methods and found lowest for 50%TW as 108.39 kJ/mol (OFW) and 116.63 kJ/mol (KAS). The relative concentration of pyrolytic products including CO2, CH4, NH3, NO, CO, CC, C6H5OH and SO2 was determined by TG-FTIR analysis, and it was found that the concentrations changed significantly with temperature. Py/GC-MS results showed that as the mass ratio of TW increased, the yield of olefins and MAHs increased as well, reaching maximum levels of 29.76% and 26.78% for 75%TW, respectively. In contrast, the yield of OCs and PAHs declined, reaching minimum levels of 7.83% and 5.01% for 75%TW, respectively. Increased production of olefins and MAHs, particularly D-limonene, toluene, and benzene, demonstrates the significance of co-pyrolyzing CW and TW to meet energy needs for the chemical sector. While reduced PAH production has environmental benefits since it reduces the risk of cancer and cardiovascular diseases. Thus, in order to upgrade pyrolytic products, TW and CW may have a significant coupling synergistic interaction.