Co-Gasification Synergistic Characteristics of Sewage Sludge and High-Sodium Coal

[Image: see text] A comprehensive study was conducted to assess the co-gasification characteristics of sewage sludge and high-sodium coal. As the gasification temperature increased, the CO(2) concentration was decreased, and the concentrations of CO and H(2) were increased, while the change of CH(4) concentration was not obvious. As the coal blending ratio increased, the H(2) and CO concentrations initially increased and then decreased, while the CO(2) concentration initially decreased and then increased. The mixture of sewage sludge and high-sodium coal shows the synergistic effect of co-gasification, and the synergistic effect was to promote the gasification reaction positively. The average activation energies of co-gasification reactions were calculated by the OFW method, and the average activation energy initially decreases and then increases as the coal blending ratio increases. Both fluidized-bed gasification and thermogravimetric analyzer gasification show that the optimum coal blending ratio is 0.6. Overall, these results provide a theoretical basis for the industrial application of sewage sludge and high-sodium coal co-gasification.