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Reuters: Shell JV Deer Park refinery slows de-coking ops -state

Mon Sep 25, 2006 11:58am ET

HOUSTON, Sept 25 (Reuters) Shell Oil Co.’s 334,000 barrel per day joint-venture refinery in Deer Park, Texas, slowed de-coking operations on Sunday, according to a notice filed Monday with the state pollution regulation agency.

During de-coking operations, the coker released coke dust into the air, according to the notice filed with the Texas Commission on Environmental Quality.

A coker processes the gunky residue at the bottom of barrel of crude into refinable material or solid carbon chunks called petroleum coke that are sold as a replacement for coal. Periodically, cokers have to be cleared of carbon powder, which is called de-coking.

Deer Park Refining LP is joint venture between Shell and Mexican national oil company Petroleos Mexicanos. Shell Oil Co. is the U.S. unit of Royal Dutch Shell Plc. (RDSa.L: Quote, Profile, Research).

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