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Sulzer Conducts Research Into Diesel Exhaust Emissions Sulzer recently commissioned a 6-cylinder RTA38 research engine at the Mobil refinery at Notre Dame de Gravenchon in France. The new engine is being used by a joint research group consisting of New Sulzer Diesel Ltd., Mobil Oil Corporation and Sulzer Brothers Ltd., to explore the performance of selective catalytic reduction (SCR) for reducing nitrogen oxides (NOx) emission levels, the pollutant that leads to photochemical smog and acid rain. The 6RTA38 research engine is basically a standard production en- gine from the Sulzer RTA series of low-speed 2-stroke engines widely used for ship propulsion. The 6RTA38 is provided with an SCR converter which uses a KatapakR catalyst unit from Sulzer Chemtech. The catalyst is coated on the inter- nal surfaces of a static mixer within the KatapakR unit. New Sulzer Diesel believes that SCR has the capability of removing 90 percent of NO from an engine's exhaust gasses. 'The SCR process uses an ammonia spray, in the form of urea, directed into the hot ex- haust gases upstream of the SCR converter. In the presence of the catalyst, NOx gases and ammonia react to form nitrogen and water vapor, both natural components of MANY CRANES TO MANY OWNERS CARGO CRANES SERVICE CRANES OFFSHORE CRANES HAGGLUNDS INC 50 CHESTNUT RIDGE ROAD MONTVALE, NEW JERSEY 07645 USA TEL.: 201-391 89 30 FAX: 201-391 86 94 Circle 246 on Reader Service Card Digital Gyro Repeaters BRIDGE WING MOUNTING of LR40/LR60 Digital Gyro Repeaters The LR40/LR60 can now be panel-mounted on the Bridge Wing using a "flip-up" plastic cover. The cover is specified to IP55. • Large super-bright Digital Heading Display. • Analog Turning Indicator - allowing instant estimation of turning rate. • Will work from most types of gyro compasses. • Programmable as Master Repeater or Slave Repeater. • Digital Data output (RS422) - for integration with survey and navigation computers. Scandinavian micro systems P.O.Box 155, N-14J1 Kolbotn, Norway Phone +4728071 07 Fax +472 80 80 95 the atmosphere. The Gravenchon exhaust emis- sions research follows several years of work on the subject at New Sulzer Diesel Ltd. New Sulzer says that their design possesses the following features: its compact size allows it to be integrated with modified engine exhaust manifolds; the engine's low inertia means that ammonia slip, the quality of ammonia slipping past the catalyst, is extremely low, even during transients; a low pressure drop and a short heating up time; a low fouling tendency, which ensures very little deterioration in the per- formance over time. The New Sulzer test program will assist the company in developing solutions to NOx emission reduction from both ships" and stationary die- sel power plants. The company is also exploring the possibility of ret- rofitting existing low-speed Sulzer diesel engines with KatapakR units. For more information on New Sulzer's SCR converter system tech- nology, Circle 14 on Reader Service Card Corps Of Engineers Expands Salmon Transport On Columbia River Begun on the recommendations of the National Marine Fisheries Service over a decade ago to improve the survival rate of steelhead salmon, the Army Corps of Engi- neers is expanding its salmon barge service from Idaho to the Pacific Ocean. In the past, barge operators on the Columbia River loaded the Army tank barges with young salmon above the Snake River's largest dam, in Idaho, and then unloaded the fish below Bonneville Dam. Under the new service, 2 barges a week are continuing another 140 miles down river to Astoria, Oregon, where the river meets the Pacific. The first test barges were moved by Brix Maritime Co, of Portland, who has this year's tug contract to move the corps' barges. The Corps of Engineers use spe- cial barges that continually circu- late river water through their tanks, allowing young fish to imprint on the changing chemistry of the water they pass. In theory, this will let the fish recognize the water chemistry on their return spawning trip. The program should eventually have a significant effect on increasing the yearly salmon population. Tidewater Names Vaccaro Manager Of Insurance Ralph A. Vaccaro, Jr., was re- cently named manager of insurance by Tidewater Inc., of New Orleans. He was with Zapata Gulf Marine Corp., which recently merged with Tidewater. Maritime Reporter/Engineering News Circle 340 on Reader Service Card