Ammonia marine engine design for enhanced efficiency and reduced greenhouse gas emissions

Abstract Pilot-diesel-ignition ammonia combustion engines have attracted widespread attentions from the maritime sector, but there are still bottleneck problems such as high unburned NH 3 and N 2 O emissions as well as low thermal efficiency that need to be solved before further applications. In this study, a concept termed as in-cylinder reforming gas recirculation is initiated to simultaneously improve the thermal efficiency and reduce the unburned NH 3 , NO x , N 2 O and greenhouse gas emissions of pilot-diesel-ignition ammonia combustion engine. For this concept, one cylinder of the multi-cylinder engine operates rich of stoichiometric and the excess ammonia in the cylinder is partially decomposed into…

• SS
  Shanghai Science and Technology Development Foundation

  Award: 23YF1419700
• NU
  National University of Singapore
• NN
  National Natural Science Foundation of China

  Awards: 52271325, 52301376, 52020105009
• CP
  China Postdoctoral Science Foundation

  Award: 2022TQ0204
• SJ
  Shanghai Jiao Tong University

  Award: 52020105009
• SR
  Shanghai Rising-Star Program
• PR
  Postdoctoral Research Foundation of China

  Awards: 2022M722054, 2022TQ0204