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Electrical conductivity of Colorado oil shale to 900 °C

✍ Scribed by Al Duba

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
781 KB
Volume
62
Category
Article
ISSN
0016-2361

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✦ Synopsis

Electrical conductivity of oil shale from the Anvil Points Mine, Colorado was measured to temperatures > 900°C with conductance bridges operating at frequencies from 100 to 100 000 Hz. The conductivity of low, intermediateand high grade oil shales (15,124,233 ml kg-', respectively) isdependent on water content up to ~100°C. At ~12o"C, values of conductivity at WI O-' S m-l are observed for all grades. A strong, time-dependent, increase in conductivity, beginning at ~y4Oo"C, marks the loss of light hydrocarbons and the formation of a conductive char. The frequency dependence of conductivityslightly less than a decade increase in conductivity per decade increase in frequency over the temperature range 10011OO"C -vanishes at temperatures near 500°C. At 600-8OO'C, the conductivity of these oil shales reaches a maximum value which is as much as 1 O* times larger than the conductivity near 250°C.

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