Task 3.7 -- Fuel utilization properties. Semi-annual report, January 1--June 30, 1995
The goal of the fuel utilization properties project was to determine the impacts of specific coal properties and additives on ash formation and deposition in advanced power systems. At the forefront of advanced power systems for coal utilization are pressurized fluidized bed (PFB) reactors and integrated gasifier-combined cycle (IGCC) reactors. Some of these systems are still in the infancy of their development and commercialization and very little is known about the types of ash deposition problems that could occur. Ash deposition in power generating systems is a significant problem that decreases efficiency and can lead to severe operational problems. During high temperature conversion of coal, the inorganic constituents in the coal are transformed into solid, liquid, and vapor species that differ in composition and size from the original inorganic constituents present in the coal. The chemical and physical properties of the intermediate ash stream are dependent in part upon the types, quantities and association of the minerals and other inorganics in the coal. There is a pressing need to obtain critical information on the aspects of inorganic transformations and deposit formation that will apply to advanced power systems so that mitigation measures can be prescribed such as predictive models, system design or operational changes, and the use of additives. The focus was on integrated gasification combined cycle (IGCC)-type systems, whereby small-scale furnaces were employed to simulate gasification or highly reducing conditions in order to produce entrained ash and deposits for analysis. Specific goals for this year`s work in the area of ash formation and deposition included the following: Determining the general chemical and physical properties of simulated entrained ash and deposits that may lead to operational problems, and Identifying and testing methods to mitigate deposition in IGCC-type systems.
- Research Organization:
- North Dakota Univ., Energy and Environmental Research Center, Grand Forks, ND (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- FC21-93MC30097
- OSTI ID:
- 650113
- Report Number(s):
- DOE/MC/30097-5568; ON: DE97002215; TRN: AHC2DT04%%24
- Resource Relation:
- Other Information: PBD: Aug 1997
- Country of Publication:
- United States
- Language:
- English
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