Abstract
Phase equilibria of the Al2O3-CaO-FeO-SiO 2-V2O3 system in synthetic slag mixtures simulating coal-petcoke slag chemistry at 1500 °C in an oxygen partial pressure of 10-8 atm were investigated by a series of quench experiments. Quenched samples were analyzed by inductively coupled plasma optical emission spectrometry (ICP), X-ray diffractometry (XRD), transmission electron microscopy (TEM), and wavelength dispersive X-ray (WDX). Two precipitated crystal phases were identified in molten slags: mullite (3Al 2O3·2SiO2) in Al2O 3-rich slags and karelianite (V2O3) in V 2O3-rich slags. Scanning electron microscopy and TEM diffraction patterns confirmed the presence of the mullite and karelianite phases. On the basis of experimental results, an isothermal phase diagram of the Al2O3-CaO-FeO-SiO2-V2O3 system at 1500 °C and PO2 = 10-8 atm is proposed while keeping CaO = 7.0 wt % and FeO = 13.5 wt %.
Original language | English (US) |
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Pages (from-to) | 3298-3306 |
Number of pages | 9 |
Journal | Energy and Fuels |
Volume | 25 |
Issue number | 7 |
DOIs | |
State | Published - Jul 21 2011 |
Externally published | Yes |
ASJC Scopus subject areas
- General Chemical Engineering
- Fuel Technology
- Energy Engineering and Power Technology