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

A comprehensive study was conducted to assess the co-gasification characteristics of sewage sludge and high-sodium coal. As the gasification temperature increased, the CO2 concentration was decreased, and the concentrations of CO and H2 were increased, while the change of CH4 concentration was not obvious. As the coal blending ratio increased, the H2 and CO concentrations initially increased and then decreased, while the CO2 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.

Automated summary

A comprehensive study was conducted on the co-gasification characteristics of sewage sludge and high-sodium coal. The results showed that as the gasification temperature increased, the CO2 concentration decreased and the concentrations of CO and H2 increased. The change in CH4 concentration was not obvious. The co-gasification of sewage sludge and high-sodium coal exhibited a synergistic effect, promoting the gasification reaction positively. The optimum coal blending ratio was found to be 0.6 according to both fluidized-bed gasification and thermogravimetric analyzer gasification. These findings provide a theoretical basis for the industrial application of sewage sludge and high-sodium coal co-gasification.