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UNION CARBIDE INTRODUCES TECHNOLOGY TO PREVENT ACID RAIN

      UNION CARBIDE INTRODUCES TECHNOLOGY TO PREVENT ACID RAIN
    WASHINGTON, Nov. 7 /PRNewswire/ -- A new technology capable of continuous removal of up to 99 percent of acid rain-causing sulfur dioxide (S02) from industrial and utility plant emissions was introduced here today by Union Carbide Chemicals and Plastics Company Inc., of Danbury, Conn.
    Called the CANSOLV System, it can be installed as a retrofit in existing flue gas systems or designed into new construction, according to G.L. Ehrens, vice president and general manager of the company's Specialty Chemicals Division.
    "In either case," he said, "the CANSOLV System offers S02 recovery rates well above the 70-90 percent achievable with conventional limestone-based scrubber systems now in use.  Also, capital costs are about 30 percent less, and operating costs 30 percent to 60 percent less.  And, because it is a recovery-type process, the resulting sulfur products are readily marketable for such uses as fertilizer manufacture," Ehrens pointed out.
    The CANSOLV System uses a thermally regenerable organic amine salt as the absorbent, with virtually no waste disposal problem. "Inorganic limestone-based methods currently in use generate large quantities of waste sludge which must be disposed of in landfills," he added.
    Successful Pilot Plant Experience
    A two-megawatt pilot plant processing a 7,000 cubic-foot-per- minute flue gas slipstream from boilers burning 7 percent sulfur petroleum coke was started up in late February, 1991 at Suncor Inc.'s oil sands plant at Fort McMurray, Alberta, Canada.
    "Successful completion of six months of pilot plant operations with this new CANSOLV System technology convinces us that it is one of the most significant developments to emerge from Union Carbide's 60-year experience in developing gas treating processes," Ehrens continued.  He cited data confirming actual SO2 removal efficiency, system availability and reliability, process economics and ease of retrofit.
    Clean Coal Technology Demonstration Project
    The U.S. Department of Energy (DOE) recently selected the CANSOLV System as one of nine demonstration projects approved as part of the government's multi-billion-dollar Clean Coal Technology Program.
    In cooperation with Aluminum Company of America, UCC&P plans to install the CANSOLV System at Alcoa's Warrick power plant near Newburgh, Ind.  It will operate as an in-duct scrubber system to remove SO2 from half the flue gas from an existing 150-megawatt boiler presently burning 3.4 percent sulfur coal mined locally.
    The project is anticipated to cost $32.7 million, of which DOE will provide half and the balance will be funded by Union Carbide with support from Alcoa.  Installation of the demonstration unit is expected to begin next year, for operation in early 1994.
    NOTE:  CANSOLV is a trademark.
    -0-                11/7/91
    /CONTACT:  Joan Worden for Union Carbide Chemicals and Plastics Company, 202-467-3900/ CO:  Union Carbide Chemicals and Plastics Company, Inc. ST:  District of Columbia IN:  CHM  OIL SU: MH -- DC032 -- 2054 11/07/91 09:01 EST
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Publication:PR Newswire
Date:Nov 7, 1991
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