舶用機関から排出されるN_2O等有害排ガスに与える燃料性状及び脱硝装置の影響 [in Japanese] Effect of Fuel Property or SCR System on Harmful Exhaust Emissions such as N_2O from Marine Diesel Engines [in Japanese]
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From the viewpoint of global environment protection, regulations for prevention of air pollution from ships have been discussed in the International Maritime Organization (IMO) and the regulations about NOx and SOx are expected to enter into force January 1st of 2000.<BR>And global warming is recently such a serious problem that it is necessary to reduce greenhouse gas emissions. CO<SUB>2</SUB> and N<SUB>2</SUB>O in exhaust gas contribute to global warming.<BR>In addition to the above, IMO will revise the regulations every five years. Then emission will be expected to be applied to other air pollutants including N<SUB>2</SUB>O in the near future.<BR>Under these circumstances, we studied effect of fuel property or SCR system on harmful exhaust emissions such as N<SUB>2</SUB>O by using a 4-stroke diesel engine.<BR>The following are found:<BR>(1) N<SUB>2</SUB>O concentration from Marine Fuel Oil is approximately 10 times as high value as that from Marine Diesel Fuel.<BR>(2) N<SUB>2</SUB>O concentration from a diesel engine is influenced more strongly by sulphur content in fuel than by nitrogen content in fuel.<BR>(3) In using same fuel for a diesel engine, N<SUB>2</SUB>O concentration is influenced by NOx concentration. N<SUB>2</SUB>O concentration increases with an increase in NOx concentration.<BR>(4) In addition to NOx reduction, reduction of N<SUB>2</SUB>O and HC is possible by using this SCR system.
- Marine Engineering
Marine Engineering 34(2), 94-100, 1999-02-01
The Japan Institute of Marine Engineering