Back to Search Start Over

Effect of Blast Furnace Sludge on SO2Emissions from Coal Combustion

Authors :
Gao, Zhifang
Wu, Zhaojin
Zheng, Mingdong
Source :
Energy & Fuels; April 2016, Vol. 30 Issue: 4 p3320-3330, 11p
Publication Year :
2016

Abstract

Blast furnace sludge (BFS) exhibits a strong sulfur-fixing ability due to the large amount of metal oxides, such as Fe2O3, CaO, SiO2, and Al2O, that it contains. In this study, the influence of BFS on SO2emissions and the sulfur-fixing mechanism is studied in the coal combustion process. The results show that the SO2emission peak values decrease with the increase of BFS mass percentage and that the sulfur-fixing ratio increases to 89% when the BFS mass percentage reaches 10% at 900 °C. The sulfur-fixing mechanism predicts that the multicomponents of BFS favor the formation of a stable sulfate (3CAO3·A12O3·CaSO4) and reduce the rapid decomposition of CaSO4coated by thermally stable sulfur compounds such as CaFe3(SiO4)2OH. These results indicate that BFS, as a sulfur-fixing agent, is cheap and highly efficient in controlling SO2emissions during coal combustion processes.

Details

Language :
English
ISSN :
08870624 and 15205029
Volume :
30
Issue :
4
Database :
Supplemental Index
Journal :
Energy & Fuels
Publication Type :
Periodical
Accession number :
ejs38953824
Full Text :
https://doi.org/10.1021/acs.energyfuels.5b02986