Effects of a Zeolite-Selective Catalytic Reduction System on Comprehensive Emissions from a Heavy-Duty Diesel Engine

Abstract The effects of a zeolite urea-selective catalytic reduction (SCR) aftertreatment system on a comprehensive spectrum of chemical species from diesel engine emissions were investigated in this study. Representative samples were collected with a newly developed source dilution sampling system after an aging process designed to simulate atmospheric dilution and cooling conditions. Samples were analyzed with established procedures and compared between the measurements taken from a baseline heavy-duty diesel engine and also from the same engine equipped with the exhaust aftertreatment system. The results have shown significant reductions for nitrogen oxides (NOx), carbon monoxide, total hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), and organic carbon (OC) emissions. Additionally, less significant yet notable reductions were observed for particulate matter mass and metals emissions. Furthermore, the production of new species was not observed with the addition of the zeolite urea-SCR system joined with a downstream oxidation catalyst.

[1]  A. Robinson,et al.  Modeling semivolatile organic aerosol mass emissions from combustion systems. , 2006, Environmental science & technology.

[2]  Raymond S. Nickerson,et al.  Protection of the Environment , 2008 .

[3]  D. D. Perlmutter.  The catalyst handbook , 1971 .

[4]  Michael J. Kleeman,et al.  MEASUREMENT OF EMISSIONS FROM AIR POLLUTION SOURCES. 2. C1 THROUGH C30 ORGANIC COMPOUNDS FROM MEDIUM DUTY DIESEL TRUCKS , 1999 .

[5]  David E. Foster,et al.  Effect of Fuel composition on combustion and detailed chemical/physical characteristics of diesel exhaust , 2003 .

[6]  Z. Gerald Liu,et al.  A Source Dilution Sampling System for Characterization of Engine Emissions under Transient or Steady-State Operation , 2008 .

[7]  Christopher P. Kolodziej,et al.  Comprehensive Characterization of Particulate Emissions from Advanced Diesel Combustion , 2007 .

[8]  Anthony S. Wexler,et al.  Evolution of particle number distribution near roadways—Part I: analysis of aerosol dynamics and its implications for engine emission measurement , 2004 .

[9]  J. Schauer,et al.  Characterization of metals emitted from motor vehicles. , 2006, Research report.

[10]  A basic study on a urea-selective catalytic reduction system for a medium-duty diesel engine , 2005 .

[11]  A C Lloyd,et al.  Diesel Engines: Environmental Impact and Control , 2001, Journal of the Air & Waste Management Association.

[12]  J. Seinfeld,et al.  Atmospheric Chemistry and Physics: From Air Pollution to Climate Change , 1997 .

[13]  Kouichi Kasahara,et al.  Development of Catalyst for Diesel Engine , 1997 .

[14]  Long-Path Open-Path Fourier.  Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air , 1999 .

[15]  P. Stolpman,et al.  Environmental Protection Agency , 2020, The Grants Register 2022.

[16]  Reinhard Niessner,et al.  Polycyclic aromatic hydrocarbons in urban air particulate matter: decadal and seasonal trends, chemical degradation, and sampling artifacts. , 2003, Environmental science & technology.

[17]  T. Raunemaa,et al.  Characterization of diesel particles: effects of fuel reformulation, exhaust aftertreatment, and engine operation on particle carbon composition and volatility. , 2004, Environmental science & technology.

[18]  David E. Foster,et al.  Effect of Engine Operating Conditions on Particle-Phase Organic Compounds in Engine Exhaust of a Heavy-Duty Direct-Injection (D.I.) Diesel Engine , 2003 .

[19]  Michael J. Kleeman,et al.  Measurement of Emissions from Air Pollution Sources. 1. C1 through C29 Organic Compounds from Meat Charbroiling , 1999 .

[20]  William T Winberry,et al.  Compendium of methods for the determination of toxic organic compounds in ambient air, June 1988 , 1988 .

[21]  G R Cass,et al.  Measurement of emissions from air pollution sources. 3. C1-C29 organic compounds from fireplace combustion of wood. , 2001, Environmental science & technology.

[22]  R. Cary,et al.  Elemental Carbon-Based Method for Monitoring Occupational Exposures to Particulate Diesel Exhaust , 1996 .

[23]  David E. Foster,et al.  Detailed Chemical Composition and Particle Size Assessment of Diesel Engine Exhaust , 2002 .

[24]  Peter Eastwood,et al.  Critical topics in exhaust gas aftertreatment , 2000 .

[25]  Wayne R. Ott,et al.  ENVIRONMENTAL STATISTICS and DATA ANALYSIS , 1995 .

[26]  Glen R. Cass,et al.  Sources of fine organic aerosol. 2. Noncatalyst and catalyst-equipped automobiles and heavy-duty diesel trucks , 1993 .

[27]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[28]  Suresh T. Gulati,et al.  Catalytic Air Pollution Control: Commercial Technology , 1994 .

[29]  J. Stoker,et al.  The Department of Health and Human Services. , 1999, Home healthcare nurse.