Experimental study of ash formation under O2/CO2 combustion

Wu Haibo, Zhang Yi, Haiyan Liao, Xuehai Yu and Zhaohui Liu

Greenhouse Gases: Science and Technology, 2019, vol. 9, issue 2, 424-432

Abstract: Oxy‐fuel combustion technology has been recognized as the most promising technology for controlling CO2 emission in coal‐fired boilers. The slagging characteristics of oxy‐fuel combustion (O2/CO2) are very different from those of air combustion (O2/N2). In this paper, an ash sample collection of Shenhua coal with high Ca and Fe content was carried out in a muffle furnace and a tubular furnace under different conditions. The ash melting point, X‐ray diffraction (XRD) and scanning electron microscopy (SEM) were used for characterization. The characteristics of Shenhua coal ash slagging in different atmospheres were studied, and the mineral transformation trend was obtained. It was concluded that the melting point of the ash samples under oxy‐fuel combustion was lower than that under an air atmosphere, and the slagging tendency was enhanced under conditions of high oxygen combustion. Under oxy‐fuel combustion, CaCO3 was found. This did not occur under an air atmosphere. The atmosphere has no obvious effect on the crystal minerals of Fe. The decrease in high melting point oxide, the formation of carbonate, and the increase in glass state and sulfate under an oxy‐fuel atmosphere all make the ash melting point lower than under an air atmosphere. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

Date: 2019
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://doi.org/10.1002/ghg.1860

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wly:greenh:v:9:y:2019:i:2:p:424-432

Access Statistics for this article

More articles in Greenhouse Gases: Science and Technology from Blackwell Publishing
Bibliographic data for series maintained by Wiley Content Delivery ().