Coal, which is brown and incompletely formed, still having the texture of the original wood.
Lignite is a type of coal that contains a lot of moisture and ash and breaks apart easily. Of the four types, lignite has the lowest carbon content and heating value. Also called brown coal, lignite is used mainly at electricity-generating plants.
a soft brownish black coal with the texture of the original wood it came from (Webster, 1984).
Soft, brown to black coal of low BTU value with original plant components still discernible.
a soft shiny black variety of coal, aboriginally used to manufacture decorative objects.
A soft, brownish coal that develops from peat through bacterial action, is rich in kerogen, and has a carbon content of 70%, which makes it a more efficient heating fuel than peat.
Low grade coal. Also called brown coal.
coal - is mined using a technique called strip mining. Lignite lies near the surface of the earth, so it requires only half the capital investment opposed to underground mining. Lignite also releases less sulfur into the air as it is burned than other kinds of coal. Lignite is used to power large generating plants for electricity near Stanton and Center, ND. N-S
A rank of coal characterized by a relatively low degree of modification of plant matter.
Usually a dark brown substance that is the lowest rank of coal.
Brownish black coal having qualities in between those of bituminous coal and peat. The texture of the original wood often is visible in lignite.
A solid fuel of a grade higher than peat but lower than bituminous coal.
The lowest rank of coal, which contains a high moisture content of up to 45% by weight and heating value of 6,500 to 8,300 Btu per pound. It is brownish black and tends to oxidize and disintegrate when exposed to air.
a brownish-black, woody-structured coal, lower in fixed carbon than either anthracite or bituminous coal, but higher in volatile matter and oxygen
A low-grade brownish coal of relatively poor heat-generating capacity.
A brownish-black coal that is intermediate in coalification between peat and sub-bituminous coal.
"young" coal with high water content, low heating values, and typically many impurities
A brownish-black coal in which the alteration of vegetal material has proceeded further than in peat but not so far as subbituminous coal.
The lowest rank of coal, which is brownish black and has a high moisture content. Lignite is used mainly to generate electricity.
Low-rank, brown coals which are distinctly brown and woody or claylike in appearance, and which contain relatively high moisture contents of between 30 and 70 percent of the fuel by weight. Sulfur may range from low to high and heating value may range from 3,500 to 7,000 Btu/lb.
A low-sulfur, low-energy coal, found primarily in the upper Great Plains.
Lowest rank of coal, with low heat values between 6,300 and 8,300 Btu/lb, on a moist, mineral-matter basis
an intermediate form of coal between peat and sub-bituminous coal (less than 19.3 MJ/kg or 8.300 BTU/lb); sometimes called brown coal
The lowest rank of coal. Lignite does not produce economical quantities of coal bed methane.
A young coal used almost exclusively for electric power generation. It is brownish black in color and has a high moisture content, sometimes as high as 45 percent, and a high ash content. It tends to disintegrate when exposed to the weather. Also referred to as brown coal.
The lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steam-electric power generation. It is brownish-black and has a high inherent moisture content, sometimes as high as 45 percent The heat content of lignite ranges from 9 to 17 million Btu per ton on a moist, mineral-matter-free basis. The heat content of lignite consumed in the United States averages 13 million Btu per ton, on the as-received basis (i.e., containing both inherent moisture and mineral matter).
Low-rank coal that consists of 50% carbon.
A soft, brown coal formed by the further compression of peat.
Color coal that is commonly called “brown coal,” ranked between peat and sub bituminous, and having less than 8,300 BTU's. Lignite is commonly found in Western states.
Type of coal with lowest carbon content (25% to 35%) and a heat value of only 4,000 to 8,300 BTUs-per-pound; called "brown coal;" used mainly for electric power generation
A soft, brown coal showing traces of plant structure. This coal is an intermediate stage between bituminous coal and peat.
A solid fuel of quality higher than peat but lower than bituminous coal. Lignite, sometimes called "brown coal," has a high content of moisture and volatile gases; thus, it is soft and has a relatively low heat content, at most 19 GJ/tonne.
A brownish-black coal of low rank with high inherent moisture and volatile matter (used almost exclusively for electric power generation). It is also referred to as brown coal. Comprises two groups classified according to the following ASTM Specification D388-84 for calorific values on a moist material-matter-free basis
a brownish-black coal in which decomposition of vegetable matter has proceeded farther than in peat but not as far as bituminous coal. Lignite usually has the original form of the wood clearly visible. Also called brown coal. [AHDOS
Lignite, often referred to as brown coal, is the lowest rank of coal and used almost exclusively as fuel for steam-electric power generation. It is brownish-black and has a high inherent moisture content, sometimes as high as 66 percent, and very high ash content compared to bituminous coal. It is also a heterogeneous mixture of compounds for which no single structural formula will suffice.