tag:blogger.com,1999:blog-33646836.post7901720996570270814..comments2023-09-22T12:10:47.897+02:00Comments on Risorse, Economia e Ambiente: Re Carbone contro Re Petrolio, chi vince?Ugo Bardihttp://www.blogger.com/profile/18231859786466899924noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-33646836.post-400552475228481922007-04-05T07:53:00.000+02:002007-04-05T07:53:00.000+02:00Volevo segnalare la pubblicazione dello studio COA...Volevo segnalare la pubblicazione dello studio COAL: RESOURCES AND FUTURE PRODUCTION dell' Energy Watch Group,scaricabile dal sito<BR/>http://www.energywatchgroup.org/files/Coalreport.pdfUnknownhttps://www.blogger.com/profile/12747544236332123037noreply@blogger.comtag:blogger.com,1999:blog-33646836.post-89041766666034812922007-03-22T22:41:00.000+01:002007-03-22T22:41:00.000+01:00Sono daccordo. Le riserve di carbone sono molto pr...Sono daccordo. Le riserve di carbone sono molto probabilmente sovrastimate. In più, il carbone si trasporta male; meglio bruciarlo sul posto. Per cui, mettersi a fare centrali a carbone in Italia sarebbe una bella fesseria.Ugo Bardihttps://www.blogger.com/profile/18231859786466899924noreply@blogger.comtag:blogger.com,1999:blog-33646836.post-68179526729384665322007-03-22T11:10:00.000+01:002007-03-22T11:10:00.000+01:00Un articolo interessante sull'argomentohttp://glob...Un articolo interessante sull'argomento<BR/>http://globalpublicmedia.com/richard_heinbergs_museletter_179_burning_the_furnitureUnknownhttps://www.blogger.com/profile/12747544236332123037noreply@blogger.comtag:blogger.com,1999:blog-33646836.post-86865116917345155262007-03-21T17:02:00.000+01:002007-03-21T17:02:00.000+01:00Sempre da un articolo di oildrumhttp://www.theoild...Sempre da un articolo di oildrum<BR/>http://www.theoildrum.com/node/2379<BR/>"Richard Heinberg: Actually, future global coal production is routinely overestimated. That, at least, is the conclusion of an as yet unpublished study by the Energy Watch Group of Germany. That team has found that in the countries where coal reserves are well reported, the size of resources has been downgraded dramatically in recent years. There are other countries that have not changed reserves reports for decades, and it appears that those numbers are probably even more inflated than oil reserves numbers for OPEC.<BR/><BR/>The study concludes that global coal production will peak in 10 to 20 years. I'm tracking a Dutch study-in-progress where the researchers are using different criteria, and their preliminary results confirm the German study."Unknownhttps://www.blogger.com/profile/12747544236332123037noreply@blogger.comtag:blogger.com,1999:blog-33646836.post-20851723304826909852007-03-20T07:47:00.000+01:002007-03-20T07:47:00.000+01:00credo che per capire le reali potenzialità del car...credo che per capire le reali potenzialità del carbone sia molto interessante l'esempio tedesco,secondo l'EIA http://www.eia.doe.gov/oiaf/ieo/coal.html<BR/>" The most recent assessment of world coal reserves includes a substantial downward adjustment for Germany, from 73 billion tons of recoverable coal reserves to 7 billion tons."<BR/>Tutto questo nonostante l'industria del carbone tedesca riceva sussidi pubblici,circa 2,4 miliardi di euro nel 2006 (erano circa 4 nel 2000).<BR/>Dati preoccupanti ci sono anche per il carbone americano,almeno secondo questo articolo di http://www.theoildrum.com/node/2359<BR/>" The book notes that the first survey of coal reserves was in 1909 when 2 USGS employees estimated the US held about 3 trillion tons of which about 2 trillion was considered mineable. This study was not superseded until 1974 when Paul Averitt, also of the USGS, did a more detailed study, that brought the practical number down to 483 billion tons of “reserve base” with about 50% of that being recoverable. However, in 1986 the USGS did a detailed study of the Matewan coalfield in south-eastern Kentucky and looked in more detail at the geological constraints that would better define true reserves. From this they concluded that the amount that could be recovered was more likely no more than 30% of the base.<BR/>In 1989 this study was updated with the help of the US Bureau of Mines (the agency that was eliminated in the last Administration) who brought a more realistic cost evaluation, from which it was concluded that the more realistic recovery percentages would be in the 5 – 20% range, and that, for places such as the Powder River Basin (where all the coal is currently strip mined for supply as low-sulfur coal to much of the US) may ultimately recover only 11% - given that most of the reserve base lies underground where it can no longer be easily stripped (in much the same as the oil sands of Alberta must ere too long also go underground)."Unknownhttps://www.blogger.com/profile/12747544236332123037noreply@blogger.com