Search results
Results from the WOW.Com Content Network
Lignite is mined all around the world and is used almost exclusively as a fuel for steam-electric power generation. Lignite combustion produces less heat for the amount of carbon dioxide and sulfur released than other ranks of coal. As a result, lignite is the most harmful coal to human health. [3]
Sub-bituminous coal, whose properties range between those of lignite and those of bituminous coal, is used primarily as fuel for steam-electric power generation. Bituminous coal , a dense sedimentary rock, usually black, but sometimes dark brown, often with well-defined bands of bright and dull material.
Thus, like oil reserves, coal reserves can vary with coal and carbon prices. There are various definitions of "reserve". [6] Unlike the internationally traded commodities hard or soft coal, lignite is not traded far from the place where it is mined because of its low value relative to transport costs, so it does not have a national price. [7]
Due to stable lignite prices and simultaneously rising oil prices, the use of lignite in industry has been economically very interesting since 2003. The Frechen coal refining plant is the only one still producing about half domestic and half industrial briquettes with its 1.7 million t dry coal production.
Plants designed for lignite (brown coal) are used in locations as varied as Germany, Victoria, Australia, and North Dakota. Lignite is a much younger form of coal than black coal. It has a lower energy density than black coal and requires a much larger furnace for equivalent heat output.
Montan wax, also known as lignite wax or OP wax, is a hard wax obtained by solvent extraction of certain types of lignite or brown coal. [1] Commercially viable deposits exist in only a few locations, including Amsdorf, Germany, and in the Ione Basin near Ione, California. High-graded lignite wax are also found in Yunnan and Jilin, China.
Substitute natural gas (SNG), or synthetic natural gas, is a fuel gas (predominantly methane, CH 4) that can be produced from fossil fuels such as lignite coal, oil shale, or from biofuels (when it is named bio-SNG) or using electricity with power-to-gas systems.
Coal comes in four main types or ranks: lignite or brown coal, bituminous coal or black coal, anthracite and graphite.Each type of coal has a certain set of physical parameters which are mostly controlled by moisture, volatile content (in terms of aliphatic or aromatic hydrocarbons) and carbon content.