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Show EMISSIONS CONTROL TECHNOLOGY FOR COAL-FUELED RECIPROCA TING ENGINES Charles Benson Robert Wilson, Ir. Peter I. Loftus Arthur D. Little, Inc. ABSTRACT DanielItse MarkMorg~ PSI Technology Co. Over the last 4 years, development of a coal-fueled, diesel engine for stationary power applications has been conducted by the team of Arthur D. Little, Cooper Bessemer, AMBAC, PSI Technology Company (pSIT), Otisca Industries, Ltd., AMAX R&D, CQ, Inc., and Energy International. This development effort will soon culminate in a 100-h continuous, proof-of-concept demonstration of a 1.8 MW six-cylinder engine at CooperBessemer in Mt. Vernon, Ohio. As part of the development work, over 650 hr of testing have been conducted on this engine and a single-cylinder laboratory research engine. These tests have shown that coal-fueled diesel operation is feasible with (a) economical coal cleaning and slurrying technology; (b) wear resistant engine components involving ceramic materials; and (c) an effective emission control system. This paper discusses the features and performance of the emissions control system. Initial results are presented for the selective catalytic reduction process that controls NOx and the sodium based sorbent injection process that controls SOx. BACKGROUND This research effort is being conducted as part of the Heat Engines Program of the u. S. Department of Energy Morgantown Energy Technology Center. The objective is to demonstrate efficient and low-emission operation of a large, stationary, reciprocating engine burning coal water slurry (CWS). Over the past 4 years, the Arthur D. Little/Cooper-Bessemer team has gained experience by operating a single-cylinder Cooper-Bessemer laboratory IS-1 engine on CWS. The IS engine operation has helped to identify and resolve technical challenges in CWS handling, injection and combustion as well as to develop highly durable combustion chamber components. Testing has also helped to identify the levels of pollutants in the untreated exhaust gas, thereby establishing realistic design targets for the emission control system. Based on this experience, a six-cylinder, 1.8 MW engine has been redesigned to operate on cWs and has been equipped with a fu flow emission control system. The selection, integration and testing of emission control system components are described below. I |
