From 743 K to 823 K, oxidation of carbon residue
proceeds, and this was inferred as C[O.sub.2] was detected during this period.
[6.] Sanford, E.C., `Conradson Carbon Residue
Conversion during Hydrocracking of Athabasca Bitumen: Catalyst Mechanism and Deactivation', Energy Fuels, 9:549-559 (1995).
In the May 5 [N.sub.ATURE], Filippo Radicati di Brozolo, a apace scientist at Charles Evans and Associates in Redwood City, Calif., and his colleagues describe finding fullerenes among carbon residue
in a tiny impact crater on NASA's Long-Duration Exposure Facility after that spacecraft's return to Earth.
Lustrous carbon residue
must be burned off before the crucible is used for the next test.
The cleaner removes all lubricants and carbon residue
. I let my cases air-dry overnight and they began to tarnish.
The industrial analysis of shale ash has given the following data, %: moisture--0.37; ash (dry basis)--98.54; volatile matter (dry basis)--1.09; carbon residue
While the researchers found an unusually large amount of carbon residue
in their samples, they also measured a surprisingly minuscule amount of noble gases.