Effect of Selective Catalytic Reduction Unit on Emissions from an Auxiliary Engine on an Ocean-Going Vessel

Jayaram, V.; Miller, J.; Nigam, A.; Welch, W.; Cocker, D. (2009). Effect of Selective Catalytic Reduction Unit on Emissions from an Auxiliary Engine on an Ocean-Going Vessel. Report by California Air Resources Board.

@techreport{Jayaram-2009-4002,
author = {Jayaram, V and Miller, J and Nigam, A and Welch, W and Cocker, D},
title = {Effect of Selective Catalytic Reduction Unit on Emissions from an Auxiliary Engine on an Ocean-Going Vessel},
institution = {California Air Resources Board},
year = {2009},
month = {apr},
url = {https://ww2.arb.ca.gov/sites/default/files/2019-12/post%20panamax%20main%20hfo_mdo%20final_ADA.pdf},
keywords = {Unspecified Feedstock, Heavy Fuel Oil (HFO), Marine Diesel Oil (MDO), Unspecified Pathway, Engine Testing and Performance, Lifecycle Assessment (LCA) and Air Emissions, Ocean-going Vessels},
}

TY - RPRT
TI - Effect of Selective Catalytic Reduction Unit on Emissions from an Auxiliary Engine on an Ocean-Going Vessel
AU - Jayaram, V
AU - Miller, J
AU - Nigam, A
AU - Welch, W
AU - Cocker, D
AB - A major cargo shipping company and the University of California, Riverside (UCR) worked together under a contract with the California Air Resources Board (CARB) to demonstrate the effectiveness of a selective catalytic reduction (SCR) unit in removing criteria pollutants from a typical marine auxiliary engine. Testing was conducted aboard a post-Panamax vessel. The auxiliary engine equipped with the SCR control was tested using a Heavy Fuel Oil (HFO) as well as a Marine Distillate Oil (MDO). The test cycle used to evaluate the emissions approximated as closely as possible the ISO 8178-D2 marine engine certification cycle. The sampling was conducted in two campaigns July 2005 and December 2005 each of which lasted two days. Real-time gaseous emissions data (CO2, NOx and CO) were logged before and after the SCR unit. Filter samples were collected and analyzed to determine the total particulate matter (PM2.5) emission factor and speciated PM2.5 emission factors that include elemental carbon (EC), organic carbon (OC), hydrated sulfate (H2SO4.6.5H2O). The inorganic (ash) PM2.5 emission factor was estimated by assuming that the ash content of the fuel was all converted to PM2.5. The SCR unit was unstable and not operating within its specifications during the July 2005 test. After significant review, re-engineering and re-commissioning of the system, it was tested in December 2005. The gaseous emission factors for the, MAN B&W 7L32¬40, before and after the SCR are shown in the data. The SCR reduced the NOx emission factor by 90-91% in the case of the HFO fuel and 82-84% in the case of the MDO. The CO emissions increased by a factor of 1.4 to 2.0, due to the potential oxidation of the organic carbon in the gas phase. Total and speciated PM emission factors determined before and after the SCR are reported in Table ES-2. These emission factors are biased low due to the use of 3m long heated raw gas transfer lines while sampling. Though the certification method allows a transfer line up to 5m in length, we subsequently learned that there can be a PM loss as high as 40% while testing high sulfur fuels (Jayaram et al., 2009). Though absolute values of these emissions factors are not accurate, we believe these PM emission factors provide a reasonably good indication of the effects of the SCR.
DA - 2009/04//
PY - 2009
SP - 47
PB - California Air Resources Board
UR - https://ww2.arb.ca.gov/sites/default/files/2019-12/post%20panamax%20main%20hfo_mdo%20final_ADA.pdf
LA - English
KW - Unspecified Feedstock
KW - Heavy Fuel Oil (HFO)
KW - Marine Diesel Oil (MDO)
KW - Unspecified Pathway
KW - Engine Testing and Performance
KW - Lifecycle Assessment (LCA) and Air Emissions
KW - Ocean-going Vessels
ER -