Review of some recent research on the combustion properties of coal macerals

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:254672

Crelling, J C ^[1]; Thomas, K M ^[2]

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1. Southern Illinois Univ., Carbondale, IL (United States)
2. Univ. of Newcastle upon Tyne, (United Kingdom)

The work reviewed here deals with combustion studies on coal macerals, the individual plant derived substances that make up coal, and lithotypes which are associations of macerals. Studies on these components are important for two reasons. One is that broad industrial experience in pulverized fuel combustion has shown that independently of both coal rank and ash type and content, maceral composition has a significant effect on combustion. A Gondwana coal with an high inertinite content will burn differently from a similar rank Illinois Basin coal dominated by vitrinite. The particle size in pulverized fuel combustion is 70% < 75 micrometers. This is a size range where the particles are becoming very heterogeneous and can cover the broad range of maceral and lithotype properties. This may be a factor in carbon burn-out which is especially important in low {open_quotes}NOx{close_quotes} burners. The other reason is that the bulk of the work done on coal combustion has dealt with whole coals only and is, thus, not very informative on maceral effects.

• OSTI ID: 254672
• Report Number(s): CONF-940813--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBON
COAL RANK
COMBUSTION PROPERTIES
INERTINITE
LITHOTYPES
MACERALS
PARTICLE SIZE
SULFUR CONTENT
VITRINITE