Environmental groups have raised concerns about the broader impact of the shale oil project, however, as the kerogen oil it produces is a highly carbon-polluting fuel.
42.
Another classification, known as the van Krevelen diagram, assigns kerogen types, depending on the hydrogen, carbon, and oxygen content of oil shales'original organic matter.
43.
Infrared astronomy has also been used to assess the composition of solid materials in the interstellar medium, including silicates, kerogen-like carbon-rich solids, and ices.
44.
Under the heat ( above 50 �C ) and pressure of burial deep in the earth, the remains were transformed into materials such as asphalt / bitumen, kerogen, or petroleum.
45.
When this ooze is cooked at desired pressure, three to six kilometers ( 1.8-3.7 miles ) depth, and temperature,, it will form kerogen.
46.
Although kerogen cracking decomposition is a source of oil and gas from the Barnett Shale, the principal source of gas in the Newark East Field is from cracking of oil and bitumen.
47.
More than a dozen companies had attempted to bring oil shale into commercial production by mining the rock, roasting a substance called kerogen out of it, and refining that into crude oil.
48.
:I don't know the answer, but Petroleum # Formation and Catagenesis ( geology ) say that C-C bonds are formed by living organisms, which die and become kerogen.
49.
Underneath a drier outer crust ( much like oil shale ), some other NEOs are inactive comets which include billions of tons of water ice and kerogen hydrocarbons, as well as some nitrogen compounds.
50.
"' Oil shale "'is a fine-grained sedimentary rock containing significant amounts of kerogen, from which one can extract liquid hydrocarbons . more . . . " ')
