Prevention of sulfur gas emissions from a rotary processor using

Mineral oils: processes and products – Tar sand treatment with liquid – Inorganic liquid

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208390, C10G 100

Patent

active

056075774

ABSTRACT:
Oil sand is treated to prevent the production of sulfur dioxide ("SO.sub.2 ") from a known rotating kiln-type processor. Lime or calcium oxide ("CaO") is added with the oil sand feed to the kiln. In the kiln, the CaO is mixed with the sulfur-containing bitumen of the oil sand and preheated. The preheated mixture is then pyrolysed, forming coke which is modified by the added CaO to reduce its tendency to produce SO.sub.2 when combusted. The modified coke is then combusted with air, producing substantially no SO.sub.2.

REFERENCES:
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patent: 4563246 (1986-01-01), Reed et al.
patent: 4616574 (1986-10-01), Abrams
patent: 5217578 (1993-06-01), Taciuk
Lyngfelt et al., Sulphur capture in fluidised-bed combustors: temperature dependence and lime conversion, Journal of the Institute of Energy, Mar. 1989, pp. 62-72.
Kovacik et al, H.sub.2 Capture in Coal Gasification Using Calcium Based Sorbents, ARC CSChE Proceedings, 1991.
Nguyen et al., Sulphur Capture During Gasification of Oil Sand Cokes, the Canadian Journal of Chemical Engineering, vol. 71, Jun. 1993, pp. 401-410.
Z. M. George et al., Coking of bitumen from Athabasca oil sands., Alberta Research Council, Council, Contribution No. 1068, May 27, 1981.

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