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Distribution of mercury during simulated in situ oil shale retorting


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This paper reports the first continuous, real-time measurements of Hg in process gases. Mercury in offgases from a steam/air/N/sub 2/ run of a 20-kg laboratory in situ retort was monitored for 78 h by using Zeeman atomic absorption spectroscopy. A good mass balance was obtained, and 95% of the Hg (1391 was recovered; 76% was present in the gases, 13% in the spent shale, 9% in the shale oil, and 3% in the retort water. The offgas Hg was nonuniformly emitted in a series of pulses during the final one-third of the run. Studies of four other incomplete runs revealed that Hg accumulates in unretorted shale ahead of the reaction zone. This Hg travels down the shale bed in advance of the reaction zone and is released into the gases when the temperature at the bottom of the bed reaches about 300/sup 0/C.

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Last Updated September 29, 2016, 17:33 (EST)
Created September 29, 2016, 17:33 (EST)
Citation Fox, J.P. ---- Roy Long, Distribution of mercury during simulated in situ oil shale retorting, 2016-09-29,
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Point Of Contact Roy Long
Program Or Project KMD
Publication Date 1985-1-1