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.

_为提高NOx减排效率，弥补船用柴油机UWS（尿素水溶液）-SCR系统的不足，设计了一种使用氨基甲酸铵（AC）的固体SCR（选择性催化还原）系统。固体SCR系统安装在船舶发电用1.1MW发动机的排气管路上，并与现有的UWS-SCR系统进行了减排性能比较。发动机排放的NOx为 9.2 g/kWh，使用 UWS _- SCR 系统后降至 1.94 g/kWh。使用固态 SCR 系统可显着降低_NOx排放量为 0.3 g/kWh，是 UWS-SCR 系统的 15%。此外，固体 SCR 系统显示出比 UWS-SCR 系统更少的氨逃逸特性。在固体-SCR 系统中，气态氨直接从排气管路供应，与废气充分混合并与SCR 催化剂中的_{NOx反应良好。}固体SCR系统在实际船舶运行中进行了210 h的耐久试验。NOx还原效率在 210 小时_内保持在 90% 以上。耐力测试的 AC 消耗率为 1.7–4.3 kg/h。