Torrefaction-assisted oxy-fuel co-combustion of textile dyeing sludge and bamboo residues toward enhancing emission-to-ash desulfurization in full waste circularity
Yükleniyor...
Dosyalar
Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Emission-to-ash desulfurization and full waste circularity can be enhanced by the proper selection of multiple wastes and operational conditions. In this context, a new combination of textile dyeing sludge (TDS), bamboo residues (BR), torrefaction, and oxy-fuel (O-2/CO2) atmosphere was proposed in this study. Their blend (0.5TDS) torrefied at 250 degrees C (T250) improved its co-combustion performance by 17.30% based on the comprehensive combustion index (CCI). The CCI value of T250 in the oxy-fuel atmosphere of 20% O-2/80% CO2 was about 3.6 times that of the mono-combustion of TDS in the air atmosphere. The co-combustion interaction reduced SO2 emission since the increased alkali metals and alkaline earth metals (especially K) preferentially reacted with S to form sulfate at <= 700 degrees C. Compared to the air mono-combustion of TDS, T250 in 20% O-2/80% CO2 reduced SO2 emission (mg/MJ) by 55.09%. With the temperature rise from 700 to 900 ?, K-sulfate was completely transformed into aluminosilicate and released the captured SO2 in which case Ca became the main S-fixing agent. The shift from air to 20% O-2/80% CO2 retained sulfate in the bottom ash. Our findings provide new and practical insights into sustainable, efficient, and clean co-combustion and energy utilization.
Açıklama
Acknowledgments This research was financially supported by the National Natural Science Foundation of China (No. 51978175 and 22006015) and the Scientific and Technological Planning Project of Guangzhou, China (No. 202103000004) .
Anahtar Kelimeler
Circular Economy, Optimization, Pollution Control, Sewage-Sludge, Fluidized-Bed, Hydrothermal Carbonization
Kaynak
Fuel
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
318
Sayı
Künye
Hu, J., Song, Y., Liu, J., Evrendilek, F., Zhang, G., Ren, M., ... & Sun, S. (2022). Torrefaction-assisted oxy-fuel co-combustion of textile dyeing sludge and bamboo residues toward enhancing emission-to-ash desulfurization in full waste circularity. Fuel, 318, 123603.
