Transformations of inorganic coal constituents in combustion systems

Technical Report · Wed May 01 04:00:00 EDT 1991

OSTI ID:5384403

Helble, J J; Srinivasachar, S; Wilemski, G; Boni, A A ^[1]; Kang, Shin-Gyoo; Sarofim, A F; Beer, J M ^[2]; Peterson, T W; Wendt, J O.L.; Gallagher, M N.B. ^[3]; Shah, N

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1. PSI Technology Co., Andover, MA (United States)
2. Massachusetts Inst. of Tech., Cambridge, MA (United States)
3. Arizona Univ., Tucson, AZ (United States)

Objectives of this project are: (1) define the partitioning of inorganic constituents associated with raw coal particles among products (including vapors, aerosols, and residual char/ash particles) formed under conditions representative of pulverized coal flames as a function of the specific (intrinsic and extrinsic) characteristics of the raw coal and the environment in which the transformations occur; and (2) characterize the resultant spectrum of products in detail; To elucidate and quantify the fundamental processes and by which transformations of the inorganic constituents occur; and To develop, based on the information required in the above, a tractable process'' model capable of predicting the significant features of the transformation process, most importantly, the nature and distribution of products. The work discussed herein highlights recent accomplishments: at the University of Kentucky (UK), in analyzing recently obtained XAFS data; at the Massachusetts Institute of Technology (MIT), in modeling the char fragmentation process, allowing for pore interactions to produce clustered pore arrangements; at MIT, in analyzing experiments with chars of varying porosity to quantify the effect on char fragmentation; at the University of Arizona (UA), in examining the behavior of alkali metals during combustion; at UA, in examining the capture of vaporized sodium by extraneous kaolinite additive; at PSI Technology Company (PSIT), in examining the transformations and stickiness of nepheline and kaolinite/montmorillonite mixtures, and conducting initial experiments with the SOAP and Loy Yang 1953 coals; and at PSIT, in continuing development of the engineering model for ash particle formation. 96 figs., 4 tabs.

• Research Organization: PSI Technology Co., Andover, MA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-86PC90751
• OSTI ID: 5384403
• Report Number(s): PSI-1024/TR-1119; ON: DE91016791
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ALKALI METALS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
ASHES
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
CLAYS
COAL
COMBUSTION
COMBUSTION PRODUCTS
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
EVAPORATION
FOSSIL FUELS
FRAGMENTATION
FUELS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KAOLINITE
MATERIALS
MATHEMATICAL MODELS
METALS
MINERALS
MONTE CARLO METHOD
MONTMORILLONITE
OXIDATION
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POROSITY
POTASSIUM
PROGRESS REPORT
PYROLYSIS PRODUCTS
RESIDUES
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
THERMOCHEMICAL PROCESSES