Experimental and theoretical investigation of the formation and growth of ash agglomerates

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6341797

Carty, R H; Mason, D M; Kline, S; Babu, S P

The behavior of coal mineral matter is of concern in ash-agglomerating gasifiers because it governs deposition on gasifier internals and down-stream surfaces as well as ash removal. The ultimate aim of the IGT research program in ash chemistry is to be able to predict quantitatively the behavior of the mineral matter in a fluidized-bed gasifier based on the operating of the gasifier and a minimum analysis of the characteristics of the mineral matter present in the coal feed. The current program combines experimental studies and a theoretical analysis to accomplish this objective. In this paper, the reaction of the coal mineral matter with limestone used as a sulfur-capture agency is discussed. When limestone is used to capture sulfur in a fluidized-bed coal gasifier, the factors affecting the utilization of the limestone including its interaction with the coal ash become very important. One of these factors is the behavior of the coal mineral matter in the reactor, especially the type and extent of its reaction with the limestone particles. In this work, the reaction of the coal mineral matter with the limestone particles was investigated by study of the ash discharge and bed material from a pilot plant test in which limestone was used for sulfur capture and tests in a 2-inch-ID reactor in which mixtures of limestone plus coal char were gasified with steam plus air. Examination of the ash residues of these tests has led to the formulation of a tentative description of the behavior of the coal ash. 6 figs., 7 tabs.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA)
• DOE Contract Number: AC21-84MC21313
• OSTI ID: 6341797
• Report Number(s): CONF-880915-2; ON: DE89007155
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AGGLOMERATING ASH PROCESS
ALKALINE EARTH METAL COMPOUNDS
ASHES
BENCH-SCALE EXPERIMENTS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GASIFICATION
DOLOMITE
ENERGY SOURCES
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
GASIFICATION
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATERIALS
MINERALS
OXIDES
OXYGEN COMPOUNDS
RESIDUES
ROCKS
SEDIMENTARY ROCKS
SILICATES
SILICON COMPOUNDS
SULFIDATION
SYNTHESIS
THERMOCHEMICAL PROCESSES