P33-05 燃料油(液体炭化水素)からの還元剤を用いた選択的脱硝システムの舶用エンジン排ガスへの適用

概要

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Pt/ZSM5 was used for DeNOx catalyst to the exhaust gas from marine diesel test engine using hydrocarbons as reductant. As a result of performing a DeNOx examination using kerosene, which has almost equivalent ingredients to the light ingredients obtained from marine fuel oil, necessary data for the design of future DeNOx equipment for vessels were obtained. On the other hand, in order to reduce the amount of consumption of reductant, the DeNOx experiments were carried out under the gas conditions simulated marine diesel engine exhaust gas, using SCR (Selective Catalytic Reduction) system which adopted Pt/ZSM5 as the first NO oxidization catalyst, and In/ZSM5 as the second DeNOx catalyst. Consequently, although DeNOx performance fell by SOx in exhaust gas, the amount of consumption of reductant could be remarkably reduced in the absence of SOx. Besides, even if SOx existed in the case that the rate of NO_2 contained in NOx was 50%, it turned out that DeNOx performance hardly fell.
2002-06-14