Lignite

Lignite

From Wikipedia, the free encyclopedia
For other uses, see Lignite (disambiguation).
A lignite stockpile (above) and a lignite briquette (below)
Lignite, often referred to as brown coal,[1] is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat. It is considered the lowest rank of coal due to its relatively low heat content. It has a carbon content around 60–70 percent.[1] It is mined all around the world and is used almost exclusively as a fuel for steam-electric power generation, but is also mined for its germanium content in China.

Contents

Characteristics

Lignite mining in Western North Dakota, United States (circa 1945)
Lignite is brownish-black in color and has a carbon content around 60–70 percent, a high inherent moisture content sometimes as high as 75 percent,[1] and an ash content ranging from 6–19 percent compared with 6–12 percent for bituminous coal.[2]
Strip mining lignite at Tagebau Garzweiler in Germany
The energy content of lignite ranges from 10 to 20 MJ/kg (9–17 million BTU per short ton) on a moist, mineral-matter-free basis. The energy content of lignite consumed in the United States averages 15 MJ/kg (13 million BTU/ton), on the as-received basis (i.e., containing both inherent moisture and mineral matter). The energy content of lignite consumed in Victoria, Australia, averages 8.4 MJ/kg (7.3 million BTU/ton).
Lignite has a high content of volatile matter which makes it easier to convert into gas and liquid petroleum products than higher-ranking coals. Unfortunately, its high moisture content and susceptibility to spontaneous combustion can cause problems in transportation and storage. It is now known that efficient processes which remove latent moisture locked within the structure of brown coal will relegate the risk of spontaneous combustion to the same level as black coal, transform the calorific value of brown coal to a black coal equivalent fuel, and significantly reduce the emissions profile of 'densified' brown coal to a level similar to or better than most black coals.[3] However, removing the moisture increases the cost of the final lignite fuel.

Uses

Layer of lignite for mining in Lom ČSA, Czech Republic
Because of its low energy density and typically high moisture content, brown coal is inefficient to transport and is not traded extensively on the world market compared with higher coal grades. It is often burned in power stations near the mines, such as in Australia's Latrobe Valley and Luminant's Monticello plant in Texas. Primarily because of latent high moisture content and low energy density of brown coal, carbon dioxide emissions from traditional brown-coal-fired plants are generally much higher per megawatt generated than for comparable black-coal plants, with the world's highest-emitting plant being Hazelwood Power Station[4] until its closure in March 2017.[5] The operation of traditional brown-coal plants, particularly in combination with strip mining, can be politically contentious due to environmental concerns.[6][7]
In 2014, about 12 percent of Germany's energy and, specifically, 27 percent of Germany's electricity came from lignite power plants,[8] while in 2014 in Greece, lignite provided about 50 percent of its power needs.
An environmentally beneficial use of lignite can be found in its use in cultivation and distribution of biological control microbes that suppress plant disease causing microbes. The carbon enriches the organic matter in the soil while the biological control microbes provide an alternative to chemical pesticides.[9]
Reaction with quaternary amine forms a product called amine-treated lignite (ATL), which is used in drilling mud to reduce fluid loss during drilling.

Geology

Pendant in lignite (jet) from the Magdalenian culture
Lignite begins as an accumulation of partially decayed plant material, or peat. Burial by other sediments results in increasing temperature, depending on the local geothermal gradient and tectonic setting, and increasing pressure. This causes compaction of the material and loss of some of the water and volatile matter (primarily methane and carbon dioxide). This process, called coalification, concentrates the carbon content, and thus the heat content, of the material. Deeper burial and the passage of time result in further expulsion of moisture and volatile matter, eventually transforming the material into higher rank coals such as bituminous and anthracite coal.[10]
Lignite deposits are typically younger than higher-ranked coals, with the majority of them having formed during the Tertiary period.

Resources

Australia

The Latrobe Valley in the state of Victoria, Australia, contains estimated reserves of some 65 billion tonnes of brown coal.[11] The deposit is equivalent to 25 percent of known world reserves. The coal seams are up to 100 metres thick, with multiple coal seams often giving virtually continuous brown coal thickness of up to 230 metres. Seams are covered by very little overburden (10 to 20 metres).[11]

Types

Lignite can be separated into two types. The first is xyloid lignite or fossil wood and the second form is the compact lignite or perfect lignite.
Although xyloid lignite may sometimes have the tenacity and the appearance of ordinary wood, it can be seen that the combustible woody tissue has experienced a great modification. It is reducible to a fine powder by trituration, and if submitted to the action of a weak solution of potash, it yields a considerable quantity of humic acid.[12] Leonardite is an oxidized form of lignite, which also contains high levels of humic acid.[13]
Jet is a hardened, gem-like form of lignite used in various types of jewelry.

Production

Lignite mined in millions of metric tons
Country or territory 1970 1980 1990 2000 2010 2011 2012 2013 2014 2015
 China – 24.3 45.5 47.7 125.3 136.3 145 147 145 140
 East Germany 261 258.1 280 [a] [a] [a] [a] [a] [a] [a]
 Germany 108[b] 129.9[b] 107.6[b] 167.7 169 176.5 185.4 183 178.2 178.1
 Russia 145[c] 141[c] 137.3[c] 87.8 76.1 76.4 77.9 73 70 73.2
 Kazakhstan [d] [d] [d] 2.6 7.3 8.4 5.5 6.5 6.6 –
 Uzbekistan [d] [d] [d] 2.5 3.4 3.8 3.8 – – –
 United States 5 42.8 79.9 77.6 71.0 73.6 71.6 70.1 72.1 64.7
 Poland – 36.9 67.6 59.5 56.5 62.8 64.3 66 63.9 63.1
 Turkey – 14.5 44.4 60.9 70.0 72.5 68.1 57.5 62.6 50.4
 Australia – 32.9 46 67.3 68.8 66.7 69.1 59.9 58.0 63.0
 Greece – 23.2 51.9 63.9 56.5 58.7 61.8 54 48 46
 India – 5 14.1 24.2 37.7 42.3 43.5 45 47.2 43.9
 Indonesia – – – – 40.0 51.3 60.0 65.0 60.0 60.0
 Czechoslovakia 82 87 71 [e] [e] [e] [e] [e] [e] [e]
 Czech Republic [f] [f] [f] 50.1 43.8 46.6 43.5 40 38.3 38.3
 Slovakia [f] [f] [f] 3.7 2.4 2.4 2.3 – – –
 Yugoslavia – 33.7 64.1 [g] [g] [g] [g] [g] [g] [g]
 Serbia [h] [h] [h] 35.5[i] 37.8 40.6 38 40.1 29.7 37.3
 Kosovo [h] [h] [h] [j] 8.7[k] 9[k] 8.7[k] 8.2[k] 7.2[k] 8.2[k]
 Macedonia [h] [h] [h] 7.5 6.7 8.2 7.5 – – –
 Bosnia and Herzegovina [h] [h] [h] 3.4 11 7.1 7 6.2 6.2 6.5
 Slovenia [h] [h] [h] 3.7 4 4.1 4 – – –
 Montenegro [h] [h] [h] [j] 1.9 2 2 – – –
 Romania – 26.5 33.7 29 31.1 35.5 34.1 24.7 23.6 25.2
 Bulgaria – 30 31.5 26.3 29.4 37.1 32.5 26.5 31.3 35.9
 Albania – 1.4 2.1 30 14 9 20 – – –
 Thailand – 1.5 12.4 17.8 18.3 21.3 18.3 18.1 18 15.2
 Mongolia – 4.4 6.6 5.1 8.5 8.3 9.9 – – –
 Canada – 6 9.4 11.2 10.3 9.7 9.5 9.0 8.5 10.5
 Hungary – 22.6 17.3 14 9.1 9.6 9.3 9.6 9.6 9.3
 North Korea – 10 10.6 7.2 6.7 6.8 6.8 7 7 7
Source: World Coal Association[14]  · U.S. Energy Information Administration[15]  · BGR bund.de Energiestudie 2016[16]  · 1970 data from World Coal (1987)[17] – no data available

  • East Germany became a part of Germany as a result of German reunification in 1990.

  • Data prior to 2000 are for West Germany only.

  • Data prior to 2000 represent the Soviet Union.

  • Country was a part of the Soviet Union during this time.

  • Czechoslovakia dissolved in 1993.

  • Country was a part of Czechoslovakia during this time.

  • Yugoslavia broke up in a process that concluded in 1993.

  • Country was a part of Yugoslavia during this time.

  • 2000 data is for Federal Republic of Yugoslavia.

  • Country was a part of Federal Republic of Yugoslavia during this time.

    1. Albanians unilaterally declared independence from Serbia, but the country it is not member of UN and its status is heavily disputed.

    Gallery

    See also

    References


  • Kopp, Otto C. "Lignite" in Encyclopædia Britannica

  • Ghassemi, Abbas (2001). Handbook of Pollution Control and Waste Minimization. CRC Press. p. 434. ISBN 0-8247-0581-5.

  • George, A.M.. State Electricity Victoria, Petrographic Report No 17. 1975; Perry, G.J and Allardice, D.J. Coal Resources Conference, NZ 1987 Proc.1, Sec. 4.. Paper R4.1

  • "Hazelwood tops international list of dirty power stations". World Wide Fund for Nature Australia. Archived from the original on 2008-10-13. Retrieved 2008-10-02.

  • "End of generation at Hazelwood". Engie. Retrieved 2017-06-30.

  • "The Greens Won't Line Up For Dirty Brown Coal In The Valley". Australian Greens Victoria. 2006-08-18. Retrieved 2007-06-28.

  • "Greenpeace Germany Protests Brown Coal Power Stations". Environment News Service. 2004-05-28. Archived from the original on 2007-09-30. Retrieved 2007-06-28.

  • "Statistics on energy production in Germany 2014, Department of Energy (in german, lignite = "Braunkohle")" (PDF). 2014-10-01. Retrieved 2015-12-10.

  • Jones, Richard; Petit, R; Taber, R (1984). "Lignite and stillage:carrier and substrate for application of fungal biocontrol agents to soil". Phytopathology. 74: 1167–1170. doi:10.1094/Phyto-74-1167.

  • Blatt, H., Middleton, G. and Murray, R. (1972). Origin of Sedimentary Rocks. Prentice-Hall Inc., New Jersey. ISBN 0-13-642702-2.

  • Department of Primary Industries, Victorian Government, Australia, ‘Victoria Australia: A Principle Brown Coal Province’ (Fact Sheet, Department of Primary Industries, July 2010).

  • Mackie, Samuel Joseph (1861). The Geologist. Original from Harvard University: Reynolds. pp. 197–200.

  • Tan, K.H. 2003. Humic matter in soil and the environment: principles and controversies, CRC Press, 408 pp.

  • "Resources". World Coal Association. 2014. Retrieved 2015-12-22.

  • "Production of Lignite Coal". U.S. Energy Information Administration. 2012. Retrieved 2015-12-23.

  • http://www.bgr.bund.de/DE/Themen/Energie/Downloads/Energiestudie_2016_Tabellen.xlsx?__blob=publicationFile&v=1

    1. Gordon, Richard (1987). World coal: economics, policies and prospects. Cambridge: Cambridge University Press. p. 44. ISBN 0521308275. OCLC 506249066.

    External links

    Comments

    Post a Comment

    Popular posts from this blog

    रचनाकार: कबीरदास | Kabirdas (कबीर के दोहे, साखियां (काव्य))

    रचनाकार:  कबीरदास | Kabirdas कबीर  की  साखियां (काव्य): सतगुरु सवाँ न को सगा, सोधी सईं न दाति । हरिजी सवाँ न को हितू, हरिजन सईं न जाति ।।१।। सद्गुरु के समान कोई सगा नहीं है। शुद्धि के समान कोई दान नहीं है। इस शुद्धि के समान दूसरा कोई दान नहीं हो सकता। हरि के समान कोई हितकारी नहीं है, हरि सेवक के समान कोई जाति नहीं है। बलिहारी गुरु आपकी, घरी घरी सौ बार । मानुष तैं देवता किया, करत न लागी बार ।।२।। मैं अपने गुरु पर प्रत्येक क्षण सैकड़ों बार न्यौछावर जाता हूँ जिसने मुझको बिना विलम्ब के मनुष्य से देवता कर दिया। सतगुरु की महिमा अनँत, अनँत किया उपगार । लोचन अनँत उघारिया, अनँत दिखावनहार ।।३।। सद्गुरु की महिमा अनन्त है। उसका उपकार भी अनन्त है। उसने मेरी अनन्त दृष्टि खोल दी जिससे मुझे उस अनन्त प्रभु का दर्शन प्राप्त हो गया। राम नाम कै पटंतरे, देबे कौं कुछ नाहिं । क्या लै गुरु संतोषिए, हौंस रही मन माँहि ।।४।। गुरु ने मुझे राम नाम का ऐसा दान दिया है कि मैं उसकी तुलना में कोई भी दक्षिणा देने में असमर्थ हूँ। सतगुरु कै सदकै करूँ, दिल अपनीं का साँच । कलिजु...
    Read more

    Jokes (चुटकुले), शेरो शायरी, कहानी, इतिहास, आवश्यक सुचना, कविता, रचना & हंसो हँसाओ

    Image
    आधा बचपन तो साला इसी कन्फ्यूजन में बीत गया कि समबाहु, विषमबाहु और समद्विबाहु त्रिभुज के नाम हैं या राक्षसों के! 😜😝😝😂 _________________________ स्कूल में जब पहली बार पता चला साइकोलॉजी की स्पेलिंग C से या S से नहीं बल्कि P से शुरू होती है,….. कसम से उसी दिन से अंग्रेजी से भरोसा टूट सा गया था 😒😝😝😂 _________________________ एक लड़की रोज सुबह 10 बजे पेड़ की डाल पर बैठ जाती, और शाम को 5 बजे उतर जाती . . . . MBA करके पागल हो गई थी खुद को ब्रांच मैनेजर समझती थी.. 😜😝😝😝 _________________________ कांटो भरे रास्ते पे कौन आपका साथ देगा…? पति / पत्नी भाई / बहन प्रेमी / दोस्त – जी नहीं याद रखना.. एकमात्र आपकी ‘चप्पल’ साथ देगी…! हर बार emotional होने की जरूरत नही, कभी Practically भी सोचा करो !! 😂😂😂😂😂 _________________________ एक सवाल मुझे बार बार कई सालों से परेशान कर रहा है कि . . . . . . . छोटी abcd . . बड़ी ABCD से कितने साल छोटी है ? 😰😥😝😝😝 _________________________ प्राइमरी क्लास में मास्टर साहब गणित सिखा रहे थे. . . मास्टर साह...
    Read more

    Coal

    Image
    Coal From Wikipedia, the free encyclopedia For other uses, see Coal (disambiguation) . Coal Sedimentary rock Anthracite coal Composition Primary carbon Secondary hydrogen sulfur oxygen nitrogen Bituminous coal Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams . The harder forms, such as anthracite coal , can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure . Coal is composed primarily of carbon , along with variable quantities of other elements, chiefly hydrogen , sulfur , oxygen , and nitrogen . [1] Coal is a fossil fuel that forms when dead plant matter is converted into peat , which in turn is converted into lignite , then sub-bituminous coal, after that bituminous coal , and lastly anthracite . This involves biological and geological processes. The geological processes tak...
    Read more