1998-05-04

A Study of the Vapor- and Particle-Phase Sulfur Species in the Heavy-Duty Diesel Engine EGR Cooler 981423

To meet future NO, heavy-duty diesel emissions standards, exhaust gas recirculation (EGR) technology is likely to be used. To improve fuel economy and further lower emissions, the recirculated exhaust gas needs to be cooled, with the possibility that cooling of the exhaust gas may form sulfuric acid condensate in the EGR cooler. This corrosive condensate can cause EGR cooler failure and consequentially result in severe damage to the engine. Both a literature review and a preliminary experimental study were conducted. In this study, a manually controlled EGR system was installed on a 1995 Cummins Ml l-330E engine which was operated at EPA mode 9* (1800 rpm and 75% load). The Goksoyr-Ross method (1)** was used to measure the particle-phase sulfate and vapor-phase H2SO4 and SO2 at the inlet and outlet locations of the EGR cooler, obtaining H2SO4 and SO2 concentrations. About 0.5% of fuel sulfur in the EGR cooler was in the particle-phase. The remaining fuel sulfur was as SO2 and vapor phase sulfuric acid. The particle phase sulfate concentrations were higher at the outlet location of the EGR cooler indicating conversion of SO2 to sulfate as the exhaust gas is cooled.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

A Study of the Character and Deposition Rates of Sulfur Species in the EGR Cooling System of a Heavy-Duty Diesel Engine

1999-01-3566

View Details

TECHNICAL PAPER

Modeling Sulfuric Acid Condensation in Diesel Engine EGR Coolers

970636

View Details

TECHNICAL PAPER

Optimization of Dual Loop EGR of a V6 3.0 Liter Diesel Engine for CO2 Reduction

2013-01-0316

View Details

X