subbituminous coal

subbituminous coal

[¦səb·bə′tü·mə·nəs ′kōl]
(geology)
Black coal intermediate in rank between lignite and bituminous coal; has more carbon and less moisture than lignite.
References in periodicals archive ?
It burned North Dakota lignite until about 10 years ago, when it switched to subbituminous coal from Cloud Peak Energy's Spring Creek mine in Montana.
A truly vast (inferred) supply of coal is located in the Northern Alaska-Slope Coal Province-over 120 billion tons of bituminous and subbituminous coal by one study--so much so that for a developer, given the ton/ year rates, mining all the coal in even one hundred years is unrealistic.
As one of the safest coal producers in the nation, Cloud Peak Energy specializes in the production of low sulfur, subbituminous coal.
In contrast to lignite and subbituminous coal samples, the lowest contents of sulphur species are in bituminous coal.
Environmental Clean Technologies Limited (ECT) is focused on establishing commercial-scale Coldry projects and creating economically valuable and more environmentally responsible Coldry Black Coal Equivalent (BCE) products and water from high-moisture brown coal and subbituminous coal.
Our proprietary K-Fuel(TM) process uses heat and pressure to physically and chemically transform high moisture, low-Btu coals, such as subbituminous coal and lignite, into a more energy efficient, lower-emission fuel.
Subbituminous coal is used mainly to fuel power plants.
But some utilities that burn subbituminous coal already have achieved approximately 75 percent reductions using existing control equipment, and a number of new technologies are being developed that can reduce mercury from such coal as effectively as from bituminous coal.
At the same time, production of hard and subbituminous coal in the western US has increased from 261.
production is subbituminous coal or lignite and 68% is bituminous coal.
K-Fuel produced by this process from Wyoming's Powder River Basin subbituminous coal has a heating value at least 60% higher than the raw coal, and, according to KFx literature, produces less than 0.