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[edit] Somewhat amibiguous sentence
Near the end of the Early uses as fuel section:
- Without coal, Britain would have run out of suitable sites for watermills by the 1830s.
Presumably this means that coal added power generation capacity beyond what would be possible with only watermills, but I'm not certain. Could we nail this down in the article? Vranak (talk) 21:49, 28 July 2011 (UTC)
[edit] CO2 emission info on liquefaction
It says liquefaction of coal has "generally greater" CO2 emissions, but not by how much greater. Given that the paragraph has lots of figures in it, this seems like a glaring (deliberate?) omission. I haven't been able to find an exact figure yet - but industry lobby puts forward a derisory figure that goes against common sense (heating coal to huge temperatures cannot possibly mean "equal or slightly higher" emissions) while others cite much higher figures. If this is an area of controversy, the wiki should cover it.
"The total well-to-wheels emission rate for conventional petroleum-derived fuel is about 27 pounds of CO2 per gallon of fuel. If the CO2 from the liquid coal plant is released into the atmosphere, based on available information about liquid coal plants being proposed, the total wellto-wheels CO2 emissions from coal-derived fuelwould be about 50 pounds of CO2 per gallon— nearly twice as high." http://www.nrdc.org/globalwarming/coal/liquids.pdf
"In a Congressional hearing held in April 2005, David Hawkins of the Natural Resources Defense Council testified that even if 90% of the carbon from a coal-to-liquids plant were to be captured and successfully sequestered, the “well-to-wheels” CO2 emissions would still be 8% higher than for petroleum production and refining." http://meic.org/egaging-quizes/energy/how-do-co2-emissions-from-coal-to-liquid-fuel-syngas-compare-to-petroleum-based-diesel-fuel — Preceding unsigned comment added by 94.195.239.1 (talk) 12:55, 12 October 2011 (UTC)
[edit] Rationalize the units
There are too many different units in the article. Please rationalize the units. Also, it would be good to move the consumption and reserves sections together so that there can be a discussion of how future expectations for coal supplies. Avram Primack (talk) 04:53, 15 October 2011 (UTC)
[edit] Resource
http://www.bloomberg.com/news/2011-11-25/fossil-fuels-beaten-by-renewables-for-first-time-as-climate-talks-founder.html Renewable Power Trumps Fossils for First Time as UN Talks Stall by Alex Morales November 25, 2011; excerpt ...
Renewable energy is surpassing fossil fuels for the first time in new power-plant investments, shaking off setbacks from the financial crisis and an impasse at the United Nations global warming talks. Electricity from the wind, sun, waves and biomass drew $187 billion last year compared with $157 billion for natural gas, oil and coal, according to calculations by Bloomberg New Energy Finance using the latest data. Accelerating installations of solar- and wind-power plants led to lower equipment prices, making clean energy more competitive with coal.
99.181.134.134 (talk) 05:44, 29 November 2011 (UTC)
[edit] Energy density of coal error
It looks like the values is incorrect. The correct value should be between 24 and 32 kJ/kg not 24 MJ/kg. The website that is cited http://hypertextbook.com/facts/2003/JuliyaFisher.shtml , However all of the links to the sources are broken. Furthermore it was complied by high school student, whom can be error pron. Later in the section "Carbon intensity", There is a different source cited, that claims 6.67 kWh/kg which is 24.01 KJ/Kg http://www.wolframalpha.com/input/?i=Calorific+value+of+coal
http://nuclearfissionary.com/2010/06/09/energy-density-and-waste-comparison-of-energy-production/ — Preceding unsigned comment added by 196.201.51.24 (talk) 18:45, 24 January 2012 (UTC)
[edit] Cultural Usage
The article mentions that coal is the state mineral of Kentucky, but then claims coal is not a mineral. However, anthracite is a form of mineral coal, as stated on its page. I think the reference to coal not being a mineral is misleading and should be removed. Jjjam (talk) 15:00, 2 February 2012 (UTC)
