4.7 Article

Application of reformed exhaust gas recirculation on marine LNG engines for NOx emission control

Journal

FUEL
Volume 291, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2020.120114

Keywords

Reformed exhaust gas recirculation; Exhaust gas-fuel reforming; Marine LNG engine; Engine performance; Emissions

Funding

  1. National Natural Science Foundation of China [51979212]
  2. National Key Research and Development Program of China [2016YFC0205600, [2019] 358]

Ask authors/readers for more resources

The study investigated the use of REGR technique for emissions reduction in marine LNG engines, achieving a 60-70% reduction in NOx emissions and meeting Tier III regulations. However, a high RRNG led to increased concentrations of H2 and CO, resulting in increased NOx emissions and decreased unburned hydrocarbons.
In the present study, the reformed exhaust gas recirculation (REGR) technique was employed on the marine engine fueled with LNG (i.e., marine LNG engine) for the reduction of emissions. A specially designed exhaust gas reformer was integrated with the marine LNG engine and then the performance of the closed-loop system of the reformer and engine was investigated, aiming at exploring the emissions reduction potential of the REGR technique for the marine LNG engine. The results showed that the NOx emission of the marine LNG engine with REGR was lower than that of the prototype engine by 60-70% and meanwhile can meet the Tier III emissions regulations. For the marine LNG engine with REGR, high rate of natural gas supplied to the reformer (RRNG) increased the concentrations of H2 and CO in the reformate. This advanced the flame speed of in-cylinder mixtures and led to a high peak pressure and heat release rate, resulting a 20-26% increase in NOx emission and a 10-12% decrease in the unburned hydrocarbon emission. Because of the variation in thermal efficiency of the reformer and engine, the fuel consumption rate of the closed-loop system showed a different trend with the increase of RRNG at different loads.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available