Synergistic effect of mixer and mixing chamber on flow mixing and NOx reduction in a marine urea-SCR system
For marine diesel engines, the selective catalytic reduction (SCR) system can be tailored to
ensure high nitrogen oxides (NO x) reduction performance, low ammonia (NH 3) slip, and
low urea consumption. A sufficient mixing zone of urea water solution (UWS) and exhaust
gas are required because of the limited installation space. In this study, therefore, mixing
units such as a swirl-type mixer and an additional mixing chamber were adopted to improve
the flow mixing performance with a low-pressure drop in a marine urea-SCR system. The …
ensure high nitrogen oxides (NO x) reduction performance, low ammonia (NH 3) slip, and
low urea consumption. A sufficient mixing zone of urea water solution (UWS) and exhaust
gas are required because of the limited installation space. In this study, therefore, mixing
units such as a swirl-type mixer and an additional mixing chamber were adopted to improve
the flow mixing performance with a low-pressure drop in a marine urea-SCR system. The …
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