An ammonia supplying system using ammonium salt to reduce the NOx emissions of a 1.1 MW marine engine

IF 2.6 4区 工程技术 Q1 Engineering Journal of Marine Engineering and Technology Pub Date : 2022-09-26 DOI:10.1080/20464177.2022.2127402
S. Woo, H. Raza, Wonmo Kang, Sang-Bom Choe, M. Im, K. Lim, J. Nam, Hongsuk Kim
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引用次数: 2

Abstract

A solid-SCR (selective catalytic reduction) system using ammonium carbamate (AC) was designed to improve NOx 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 NOx 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 NOx 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 NOx in the SCR catalyst. An endurance test of the solid-SCR system was conducted for 210 h during actual ship operation. The NOx 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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使用铵盐降低1.1MW船用发动机NOx排放的氨供应系统
针对船用柴油机尿素水溶液SCR系统的不足,设计了一种采用氨基甲酸铵(AC)的固体SCR系统,以提高NOx减排效率。将固体SCR系统安装在用于船舶发电的1.1MW发动机的排气线上,并将其减排性能与现有的UWS-SCR系统进行了比较。发动机排放的NOx为9.2 g/kWh,降至1.94 g/kWh。使用固态SCR系统可将NOx排放量显著降低至0.3 g/kWh,这是UWS-SCR系统的15%。此外,固体SCR系统显示出比UWS-SCR系统更少的氨滑移特性。在固体SCR系统中,气态氨直接供应到排气管线中,并且其与排气良好混合并且与SCR催化剂中的NOx良好反应。对210进行了固体SCR系统的耐久性测试 h在实际船舶操作期间。210的NOx还原效率保持在90%以上 h.交流消耗率为1.7–4.3 kg/h进行耐久性试验。
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来源期刊
Journal of Marine Engineering and Technology
Journal of Marine Engineering and Technology 工程技术-工程:海洋
CiteScore
5.20
自引率
0.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Journal of Marine Engineering and Technology will publish papers concerned with scientific and theoretical research applied to all aspects of marine engineering and technology in addition to issues associated with the application of technology in the marine environment. The areas of interest will include: • Fuel technology and Combustion • Power and Propulsion Systems • Noise and vibration • Offshore and Underwater Technology • Computing, IT and communication • Pumping and Pipeline Engineering • Safety and Environmental Assessment • Electrical and Electronic Systems and Machines • Vessel Manoeuvring and Stabilisation • Tribology and Power Transmission • Dynamic modelling, System Simulation and Control • Heat Transfer, Energy Conversion and Use • Renewable Energy and Sustainability • Materials and Corrosion • Heat Engine Development • Green Shipping • Hydrography • Subsea Operations • Cargo Handling and Containment • Pollution Reduction • Navigation • Vessel Management • Decommissioning • Salvage Procedures • Legislation • Ship and floating structure design • Robotics Salvage Procedures • Structural Integrity Cargo Handling and Containment • Marine resource and acquisition • Risk Analysis Robotics • Maintenance and Inspection Planning Vessel Management • Marine security • Risk Analysis • Legislation • Underwater Vehicles • Plant and Equipment • Structural Integrity • Installation and Repair • Plant and Equipment • Maintenance and Inspection Planning.
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