by go5star » Fri 09 Sep 2005, 12:33:53
$this->bbcode_second_pass_quote('sicophiliac', 'G')o5star - Do you work in the energy industry or something? Your post ending is intruiging me.
We are working with a new process. Before I tell you about the new process. Let's examine why the old processes did not work.
1. Pollution and Environmental issues. a. Problems arose from the use of oil shale as a heat source. (the assumption was it was readily available and cheap) It burns very dirty. Major CO2, CO, NOx and other emissions. b. The expansion of shale when heated (popcorn effect) made restoration and mitigation difficult or impossible especially because contaminants from the burning shale were attached to the spent shale. Significant amounts of kerogen were also left in the shale. This forced the companies to maintain tailings piles which were ugly to look at and had the potential to pollute ground water.
2. No redundancy. All of the old retort processes used one BIG retort. When there were issues with the one BIG retort, everything ground to a halt. This killed productivity and profits. Issues with the retorts included channeling where the heat just like water would find the path of least resistance in a retort and would not heat all the shale evenly. This caused some of the aforementioned pollution problems, was not very efficient at extracting all the oil and even made it so that they had to shut down some of the retorts and jackhammer carbon deposits off the sides.
3. Lost economic benefits. By burning shale as a heat source and letting those vapors come in contact with the other shale many of the light ends were being burned off. This typically left a thick oil and heavy tars as the end product. This product would then have to be hydrogenated and refined.
4. Use of water. Old methods used (or polluted) 3 barrels of water for every one barrel used.