Laser ignition of pulverized coals

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(94)90119-8· OSTI ID:5112487

Chen, J C; Taniguchi, Masayuki; Narato, Kiyoshi; Ito, Kazuyuki ^[1]

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1. Hitachi, Ltd., Ibaraki (Japan). Hitachi Research Lab.

The authors present a novel experiment to study the ignition of pulverized coal. A dilute stream of particles is dropped into a laminar, upward-flow wind tunnel with a quartz test section. The gas stream is not preheated. A single pulse from a Nd:YAG laser is focused through the tunnel and ignites the fuel. The transparent test section and cool walls allow for optical detection of the ignition process. In this article they describe the experiment and demonstrate its capabilities by observing the ignition behavior of spherical, amorphous-carbon particles and two coal: an anthracite and a high-volatile bituminous coal. The ignition behaviors of the carbon spheres and the anthracite are as expected for heterogeneous ignition, while the mechanism of the bituminous coal is uncertain. Calculations are also presented to describe the physical behavior of a laser-heated particle, and the heat transfer and chemistry of heterogeneous ignition.

• OSTI ID: 5112487
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 97:1; ISSN 0010-2180; ISSN CBFMAO
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
ANTHRACITE
BITUMINOUS COAL
BLACK COAL
CARBON
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
COAL
COMBUSTION KINETICS
DATA ANALYSIS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HEATING
IGNITION
KINETICS
LASER-RADIATION HEATING
MATERIALS
MATHEMATICAL MODELS
NONMETALS
PLASMA HEATING
PULVERIZED FUELS
REACTION KINETICS