Oil shale is a type of rock that has a petroleum precursor called kerogen trapped inside of it. From Wordnik.com. [J. Thomas Andrews: Oil Shale to the Rescue?] Reference
When the oil shale gets to a suitable temperature, the hydrocarbon material - called kerogen - becomes a vapor. From Wordnik.com. [Glenwood Springs Post Independent - Top Stories] Reference
This is a sedimentary rock that contains a solid compound called kerogen, which can be refined into a synthetic crude oil. From Wordnik.com. [feminist blogs] Reference
Oil shale is sedimentary rock that contains solid bituminous materials -- called kerogen -- that are released as petroleum-like liquids when the rock is heated. From Wordnik.com. [Local News RSS from The Detroit News] Reference
The "oil" in oil shale is kerogen, a precursor to oil. From Wordnik.com. [Squeezing Oil From a Stone] Reference
Oil shale is a sedimentary rock rich in organic matter containing more than 10 percent kerogen. From Wordnik.com. [Chapter 9] Reference
Oil shale is sedimentary rock with very fine pores that contain kerogen, a carbon-based, waxy substance. From Wordnik.com. [AP Environmental Science Chapter 13- Non-Renewable] Reference
kerogen is a precursor of oil — if you heat it up enough, the kerogen breaks down into char, oil, and gas. From Wordnik.com. [Bill Chameides: With Gas Pump Crunch, Is Oil Shale to the 'Rescue'?] Reference
As for shale oil, it must be heated to release the kerogen, which must then be refined to make usable product. From Wordnik.com. [Production v Reserves is the Key] Reference
Eventually the heat begins to transform the kerogen the fossil fuel embedded in the shale into oil and natural gas. From Wordnik.com. [Coyote Blog » Blog Archive » Twisted Into Pretzels] Reference
If shale is heated to 490º C, the kerogen vaporizes and can then be condensed as shale oil, a thick viscous liquid. From Wordnik.com. [AP Environmental Science Chapter 13- Non-Renewable] Reference
Left alone underground at sufficient temperature and pressure, kerogen will turn into oil -- but it takes millions of years. From Wordnik.com. [Squeezing Oil From a Stone] Reference
The rocks also contained significant amounts of kerogen. From Wordnik.com. [Telic Thoughts] Reference
To extract the kerogen, you crush and heat the marlstone. From Wordnik.com. [High Country News - Most Recent] Reference
In a sense, bitumen is a higher-quality and more useful hydrocarbon than kerogen. From Wordnik.com. [The Difference Between Oil Shale and Shale Oil, And 6 Ways to Play It -- Seeking Alpha] Reference
Oil shale, a sedimentary rock, contains kerogen, a less evolved form of crude oil. From Wordnik.com. [Israelated - English Israel blogs] Reference
As I said last time the oil is really a waxy kerogen that does not want to flow at all. From Wordnik.com. [The Oil Drum - Discussions about Energy and Our Future] Reference
Oil shale is an inorganic rock that contains a solid organic compound known as kerogen. From Wordnik.com. [The Difference Between Oil Shale and Shale Oil, And 6 Ways to Play It -- Seeking Alpha] Reference
The chemical process of pyrolysis can convert the kerogen in oil shale into synthetic crude oil. From Wordnik.com. [WN.com - Articles related to Using solar energy to power the hydrogen economy of the future] Reference
The "shale" is a sedimentary rock known as mudstone, and the "oil" is a waxy solid called kerogen. From Wordnik.com. [Aspen Times - Top Stories] Reference
Maybe we just need to wait a few million years until the kerogen has a chance to turn into crude oil. From Wordnik.com. [Aspen Times - Top Stories] Reference
We are continuing to research potential methods for kerogen recovery from the Pasquia Hills oil shales. From Wordnik.com. [The Earth Times Online Newspaper] Reference
Oil shale is a sedimentary rock containing kerogen which, when heated to extreme temperatures, yields oil. From Wordnik.com. [NewsBlaze.com Current News - Top Stories] Reference
Shale oil is extracted from sedimentary rocks that contain solid combustible organic matter called kerogen. From Wordnik.com. [thedaily.com.au: Breaking News] Reference
Essentially, the idea is to crush the oil shale to sand-sized fragments and to ignite the kerogen in the rock. From Wordnik.com. [Qwaider Planet] Reference
Oil shale is a misnomer because kerogen isn't crude oil, and the rock holding the kerogen often isn't even shale. From Wordnik.com. [The Difference Between Oil Shale and Shale Oil, And 6 Ways to Play It -- Seeking Alpha] Reference
Estimated oil yields using this technology in the kerogen-rich Green River formation are 1 million barrels per acre. From Wordnik.com. [Israelated - English Israel blogs] Reference
The federal government owns 80\% of oil shale lands in the United States, the parcels with the richest kerogen deposits. From Wordnik.com. [Israelated - English Israel blogs] Reference
The kerogen liquefies and gradually pools around an extraction well, where the oil-like fluid can easily be pumped to the surface. From Wordnik.com. [Technology Review RSS Feeds] Reference
Developing oil from shale involves extracting kerogen from sedimentary rocks, which can then be converted into liquid hydrocarbons. From Wordnik.com. [Party for Socialism and Liberation Stories] Reference
For the last century, Americans have been working to find the keys to the vast kerogen reserves that are locked up in Western shale. From Wordnik.com. [TreeHugger] Reference
Plus, the hydraulic fracturing used to get at the kerogen pollutes the groundwater with benzene, toluene, ethylbenzene, and xylenetoluene. From Wordnik.com. [Denver Post: News: Breaking: Local] Reference
The new lease rules set a minimum production of 10,000 barrels of kerogen per day in order for a lease to be converted to commercial uses. From Wordnik.com. [GJSentinel - Latest News Headlines] Reference
The process involves no mining, uses less water than other approaches, and doesn't leave behind man-made mountains of kerogen-sapped shale. From Wordnik.com. [Technology Review RSS Feeds] Reference
The kerogen content of oil shale varies widely. From Wordnik.com. [Chapter 9] Reference
Oil shale is a kerogen embedded in tons of rock. From Wordnik.com. [Andrew Gulliford: Boomtown Blues and Black Sunday Revisited] Reference
The kerogen in the rock. From Wordnik.com. [Aspen Times - Top Stories] Reference
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