Behavior of iron bearing minerals in the early stages of pulverized coal conversion processes
- Netherlands Energy Research Foundation, Petten (Netherlands)
Early stage transformations and deposition of iron bearing coal minerals, in particular pyrite (FeS{sub 2}) were studied. An atmospheric lab-scale facility was used to simulate the near burner environments in two different coal conversion processes: (i) Low-NO{sub x} pulverized fuel combustion and (ii) Entrained-flow gasification. Particle sampling showed that for both environments, the pyrite was transformed quickly to pyrrhotite (FeS). In the deposition experiments this pyrrhotite Impacts on the substrates. In the deposition experiments, the chemical composition and the morphology of the slags formed under the two conditions showed clear differences. Special attention was payed to the role of sulphur. Based on these (preliminary) experiments, a mechanistic model is proposed for the transformations of pyrite in both pulverized coal conversion systems. Furthermore a description is given of a new experimental setup for future work at elevated pressures (up to 20 bar) to enable a closer simulation of pressurized entrained-flow coal gasification processes.
- OSTI ID:
- 430296
- Report Number(s):
- CONF-960376-; ISSN 0569-3772; TRN: 97:000004-0024
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry, Vol. 41, Issue 2; Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996
- Country of Publication:
- United States
- Language:
- English
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