Transformations of inorganic coal constituents in combustion systems

Technical Report · Thu Nov 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/6424491· OSTI ID:6424491

Boni, A A; Helble, J J; Srinivasachar, S; Wilemski, G ^[1]; Sarofim, A F; Beer, J M ^[2]; Peterson, T W; Wendt, J O.L. ^[3]; Huffman, G P; Huggins, F E ^[4]

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1. PSI Technology Co., Andover, MA (USA)
2. Massachusetts Inst. of Tech., Cambridge, MA (USA)
3. Arizona Univ., Tucson, AZ (USA)
4. Kentucky Univ., Lexington, KY (USA)

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; elucidate and quantify the fundamental processes by which transformations of the inorganic constituents occur; and develop, based on the information required in a. and b. 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 highlights recent accomplishments in modeling synthetic char particle combustion times and temperatures with allowance for oxygen dissociation in the char boundary layer; in developing a continuum model for residual ash information and char fragmentation, permitting a more detailed time-resolved study of ash coalescence within a burning char particle; and in continuing development of the engineering model for ash particle formation. 40 refs., 25 figs., 10 tabs.

• Research Organization: PSI Technology Co., Andover, MA (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC22-86PC90751
• OSTI ID: 6424491
• Report Number(s): DOE/PC/90751-T5; PSI-1024; TR-1091; ON: DE91005991
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CHARS
COMBUSTION
COAL
COALESCENCE
COMBUSTION PRODUCTS
FLY ASH
MATHEMATICAL MODELS
PARTICLE SIZE
PROGRESS REPORT
AEROSOL WASTES
ASHES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
OXIDATION
PYROLYSIS PRODUCTS
RESIDUES
SIZE
THERMOCHEMICAL PROCESSES
WASTES
014000* - Coal
Lignite
& Peat- Combustion