An ammonia supplying system using ammonium salt to reduce the NOx emissions of a 1.1 MW marine engine
A solid-SCR (selective catalytic reduction) system using ammonium carbamate (AC) was designed to improve NO x emission reduction efficiency and compensate for the shortcoming of the UWS (urea water solution)-SCR system applied to marine diesel engines. The solid-SCR system was installed on the exhau...
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Published in | Journal of marine engineering and technology Vol. 22; no. 1; pp. 45 - 54 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis
02.01.2023
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Subjects | |
Online Access | Get full text |
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Summary: | A solid-SCR (selective catalytic reduction) system using ammonium carbamate (AC) was designed to improve NO
x
emission reduction efficiency and compensate for the shortcoming of the UWS (urea water solution)-SCR system applied to marine diesel engines. The solid-SCR system was installed on the exhaust line of a 1.1 MW engine for electric power generation in a ship, and its performance of emissions reduction was compared with the existing UWS-SCR system. The NO
x
emitted from the engine was 9.2 g/kWh, and it is reduced to 1.94 g/kWh when using the UWS-SCR system. Using the solid-SCR system significantly lowered NO
x
emissions to 0.3 g/kWh, which was 15% of the UWS-SCR system. In addition, the solid-SCR system showed fewer ammonia slip characteristics than the UWS-SCR system. In the solid-SCR system, gaseous ammonia was directly supplied in the exhaust line, and it mixed well with the exhaust gas and reacted well with NO
x
in the SCR catalyst. An endurance test of the solid-SCR system was conducted for 210 h during actual ship operation. The NO
x
reducing efficiency was maintained at higher than 90% for 210 h. The AC consumption rate was 1.7-4.3 kg/h for the endurance test. |
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ISSN: | 2046-4177 2056-8487 |
DOI: | 10.1080/20464177.2022.2127402 |