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This 3 page Reader was uploaded by Ahmed Mahmoud on Friday January 23, 2015. The Reader belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 42 views.
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Date Created: 01/23/15
Unit 2 Material 1 What is Coal types of Coal video lecture a Details about coal i The most abundant fossil fuel in the world ii Still the number one source of electricity 41 to speci cally iii Coal has been in decline since the 1950s however some areas of the world it is rising elsewhere b The most controversial of fossil fuels 1 c What is coal i Dead Plant matter that has been covered up with a layer of sand or silt These are the overall formation processes 1 Oxygen can t get to it this is an anaerobic environment 2 The decay process slows down 3 Matter gets pressed into coal ii Phases of Coal formation extended upon 1 Dead plant matter becomes kerogen A mixture of organic chemical matter and sediment 2 Peat this is coal junior Almost like coal but not coal just yet 3 Then Coal forms a It takes 3 7ft of dead plant patter to make 1 ft of coal iii The types of Coal 1 Lignite a Extended version of peat b Lowest Quality carbon content and heat content 2 Sub bituminous a Lower grade low sulfur 3 Bituminous 4 Antherocite The most premium grade of coal a Burns without smoke b Almost all of it now is burnt up iv Other things that matter about Coal 1 Low sulfur content coal is preferred in the United States 2 Extraction dif culty 3 Price 2 Coal Extraction Video a Coal Mines i Old School 1 Coal mines in general are tall as the dead plant matter is 2 Children were seen desirable because coal mines really aren t that big Need machines that are low 4 Continuous mining vehicle Just drills coal put it on a conveyer belt and just Whips it out 4000tons per minute 5 Need machines that are low 6 Wildcat mines Unofficial coal mines at the village level Where people are looking to get coal ii New School 1 Strip mining a Open surface mining 9quot b Very convenient c Mountain top removal Removing a summit or hill to get access to buried coal d Valley F ills The coal is just accumulated in a triangle i 3 Problems With coal extraction coal transportation video a Toxicity factors of mines i Heavy metal water 1 Water may even change colors 2 Acid mine drainage b Underground coal fires i Mining coal may result in the ignition of coal When oxygen comes into contact With it ii 20 200million tons of coal lost due to underground coal res iii Also responsible for tons and tons of mercury emission iv What do you do When you close a coalmine Make it into a landfill Burn all the trash however this poses more fire hazards c Post Coal Mining land procedures i Must restore the land to its original contour and characteristics d Worker Safety i Health Hazards 1 Black Lung Filled up lungs With coal particles 2 Cave ins 8C fires 3 Gas deposits a Methane e Transportation i Trains Cheapest way
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