Your Selections

Khair, Magdi K.
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Catalytic Formulation for NO2 Suppression and Control

SAE International Journal of Fuels and Lubricants

AEEDA-Jacques Lemaire
Haldor Topsøe A/S-Keld Johansen
  • Journal Article
  • 2008-01-1548
Published 2008-06-23 by SAE International in United States
To counter the adverse impact on the formation of harmful unregulated emissions such as nitro-polycyclic aromatic hydrocarbons (NPAH), catalyst companies and researchers have been developing catalytic coatings that have the capability of suppressing the formation of NO2. NO2 is formed at low exhaust temperatures with potentially greater concentrations at part load engine operation. Haldor Topsoe, a catalyst company from Denmark, developed such a catalytic coating for DPFs. A sample was provided to Southwest Research Institute (SwRI) to conduct this research with a view of potentially improving NO2-suppressing formulations in the future.The Haldor Topsoe diesel particulate filter (DPF) with its novel coating was tested together with three other DPFs and the results confirmed the capability of this DPF to suppress the formation of NO2. This characteristic was apparent in all five engine test modes selected to cover the full engine operating range. On average, the NO2 reduction when the exhaust flowed through the DPF was 55 percent from the engine-out levels for all five engine operating modes. This result contrasts with 39, 15, & - 66…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Portable Emissions Measurement for Retrofit Applications – The Beijing Bus Retrofit Experience

Southwest Research Institute-Magdi K. Khair, Imad A. Khalek
U.S. Environmental Protection Agency-John Guy
Published 2008-06-23 by SAE International in United States
In 2005, the United States Environmental Protection Agency (EPA) and Southwest Research Institute (SwRI) embarked on a mission to help the city of Beijing, China, clean its air. Working with the Beijing Environmental Protection Bureau (BEPB), the effort was a pilot diesel retrofit demonstration program involving three basic retrofit technologies to reduce particulate matter (PM). The three basic technologies were the diesel oxidation catalyst (DOC), the flowthrough diesel particulate filter (FT-DPF), and the wallflow diesel particulate filter (WF-DPF). The specific retrofit systems selected for the project were verified through the California Air Resources Board (CARB) or the EPA verification protocol [1]. These technologies are generally verified for PM reductions of 20-40 percent for DOCs, 40-50 percent for the FT-DPF, and 85 percent or more for the high efficiency WF-DPF. The CARB and EPA verification processes are based on the federal test procedures (FTP) transient cycle described in the Code of Federal Regulations (CFR) [2]. The demonstration involved using particulate matter a portable emission measurement system to evaluate PM mass concentrations both upstream and downstream from…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Diesel Exhaust Aftertreatment 2000-2007

Politecnico di Torino-Federico Millo
Southwest Research Institute-Magdi K. Khair
  • Progress In Technology (PT)
  • PT-126
Published 2008-04-01 by SAE International in United States

Diesel engines continue to be widely used in heavy-duty commercial applications around the world, and they are also gaining popularity in light-duty applications such as passenger cars. With this comes increased concern for and regulation of diesel emissions - most notably particulate matter (PM) and nitric oxide (NOx) emissions.

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Diesel Emissions and Their Control

DieselNet-W. Addy Majewski
Southwest Research Institute-Magdi K. Khair
  • Book
  • R-303
Published 2006-12-01 by SAE International in United States
This book will assist readers in meeting today's tough challenges of improving diesel engine emissions, diesel efficiency, and public perception of the diesel engine. It can be used as an introductory text, while at the same time providing practical information that will be useful for experienced readers. This comprehensive book is well illustrated with more than 560 figures and 80 tables. Each main section is broken down into chapters that offer more specific and extensive information on current issues, as well as answers to technical questions.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Long-Term Aging of NOx Sensors in Heavy-Duty Engine Exhaust

Battelle-John E. Orban, Steven J. Naber
Sentech Inc.-Ralph N. McGill
Published 2005-10-24 by SAE International in United States
Research has shown that there are many factors that affect the long-term performance of nitrogen oxides (NOx) control systems used in diesel engine applications. However, if the NOx emissions can be accurately monitored, it might be possible to restore performance by making adjustments to the control systems. This paper presents results from a study that tested the durability of 25 NOx sensors exposed to heavy-duty diesel exhaust for 6,000 hours. The study, conducted by the Advanced Petroleum-Based Fuels - Diesel Emission Controls (APBF-DEC) project, tested the sensors at various locations in the exhaust stream.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

A Review of Diesel Particulate Filter Technologies

Southwest Research Institute-Magdi K. Khair
Published 2003-06-23 by SAE International in United States
Diesel particulate filters (DPF), known as traps in the mid-to late 1970s, were being developed for on-highway diesel applications. However, advanced engine design and in-cylinder engineering enabled diesel engines and vehicles to meet extremely low emission limits, including those of particulate matter (PM) without the need for DPF's or other auxiliary emission control devices.Late in 2000, the US EPA finalized its on-highway heavy-duty diesel emission standards, thus ending speculations regarding its stringency and establishing the lowest limits ever. The new nitric oxides (NOX) and PM limits are seen as technology-forcing. For NOX emissions, the debate rages on among the technical community about the merits of NOX adsorbers and urea selective catalytic reduction. On the other hand, there seems to be little doubt about DPF's as the technical solution for PM.While early DPF designs suffered tremendously from their lack of reliability and durability, continued development has produced a new breed of DPF's. To date, one European passenger car manufacturer (PSA) has included DPF's in their product mix. The same manufacturer is also teaming up with Ford…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Diesel Emission Control Systems

Magdi K. Khair, Cynthia C. Webb
  • Special Publication (SP)
  • SP-1641
Published 2001-09-24 by SAE International in United States

Thirteen papers from the 2001 SAE International Fall Fuels & Lubricants Meeting.

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

The Effect of a Turbocharger Clearance Control Coating on the Performance and Emissions of a 2-Stroke Diesel Engine

Engelhard Corporation-Alex Gorel
Southwest Research Institute-Christopher A. Sharp, Magdi K. Khair
Published 1999-10-25 by SAE International in United States
Extensive efforts are being made to improve emissions from 2-stroke diesel engines. These improvements are primarily directed towards older model year engines with relatively high emissions compared with modern diesel engines. While most researchers focus their attention on engine design changes that promise substantial emission improvements, this work dealt with the turbocharger characteristics, especially as related to using internal coatings on both the compressor and turbine housings.Two identical turbochargers were tested on a Detroit Diesel 6V-92TA engine. One of the two turbochargers was left in its production configuration while the other was coated with a clearance control coating on the inside of the compressor and turbine housings. This coating led to a significant reduction in the tip clearance of both the compressor and turbine wheels. Testing was conducted at steady-state as well as transient conditions, to evaluate the effect of this coating on performance and emission characteristics of the test engine. An oxidation catalyst was also tested in conjunction with both turbochargers. Results of this work are presented in this paper, and show the superior…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Technical and Synergistic Approaches Towards the Twenty-First Century Diesel Engine

Southwest Research Institute-Magdi K. Khair
Published 1997-08-06 by SAE International in United States
Application of various motor vehicle emission control technologies has established a history of success. This success, however, has largely been offset by the constantly growing numbers of vehicles and miles traveled. Heavy-duty diesel engine manufacturers have developed new technologies in response to increasingly stringent emission standards. The diesel engine has long been a champion of fuel economy, with advantages in reliability and durability over other power plants. Yet, controlling NOx, and particulate emissions has been a formidable challenge to the diesel industry because most traditional NOx, control approaches tend to increase particulate emissions, and vice versa.Despite this challenge, there is significant evidence that heavy-duty highway engine manufacturers can achieve substantial emission reductions. Many development programs carried out over the last five years have yielded remarkable results in laboratory demonstrations. The introduction of electronic controls to the heavy-duty diesel engine by industry has provided new opportunities for implementing even greater exhaust emission reductions while maintaining its fuel economy and durability advantages. Today, heavy-duty diesel engines exhibit excellent smoke control characteristics, which enable them to comply with…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Achieving the 2004 Heavy-Duty Diesel Emissions Using Electronic EGR and a Cerium Based Fuel Borne Catalyst

Navistar International Corporation-Pranab K. Das, Ken Ceynow
Rhône-Poulenc Inc.-Dimitrios Psaras, Jerry C. Summers
Published 1997-02-24 by SAE International in United States
The post-1998 diesel engine emissions challenge was put forth in July 1995 by the Statement of Principles (SOP) signed by the manufacturers of heavy duty engines, the U.S. Environmental Protection Agency (EPA) and the California Air Resources Board (CARB). Through this SOP, the signatories agreed to reduce the on-highway diesel engine NOx emissions by 50% from the legislated 1998 4.0 g/bhp.hr to 2.0 g/bhp.hr by the year 2004 with no increase over the 1998 particulate matter legislated level set at 0.1 g/bhp.hr. There are provisions in the SOP for the optional grouping of the gaseous hydrocarbons and NOx, limiting them at a combined value of 2.5 g/bhp.hr with a 0.5 g/bhp.hr hydrocarbon limit.In North America, particulate matter emissions standards were first imposed on heavy duty diesel engines in 1988. Since then, the NOx and particulate matter were balanced by taking advantage of the trade-off between the two pollutants inherent in diesel engines. As emission standards have become more stringent, controlling the trade-off between NOx and particulate matter has become the major challenge in meeting emissions…
Annotation ability available