Diesel Fuel Filtration for Emission Control -
Issues, Challenges and Solutions

Panel Discussion - Thursday, October 18, 2007, 10:35 am - 12:00 pm

In order to meet diesel emission regulations, engines need to control multiple fuel injection events per combustion cycle over a wide range of operating speeds and conditions. High pressure common rail (HPCR) fuel systems are essential to accomplish this. While HPCR provides superiorcontrol of fuel injection events, it is sensitive to contaminantion.

At the same time that HPCR is being introduced to the marketplace, fuels,themselves, are changing, as ultralow sulfur diesel (ULSD) and biodiesel fuels enter the pipeline. This is an exciting and challenging time for
contamination control and fuel filtration.

This session brings together a panel of experts with diverse experience in filtration, engines, filtermedia, testing, and fuels. Experts will discuss the challenges, issues, and opportunities associated with fuel filtration for HPCR. The audience is invited to ask questions of the panel and take part in the discussion. Among the topics that may be addressed are:

• What contaminants do we need to worry about and where do they come from?
• What are the cleanliness and filtration requirements for the new fuel systems?
• How can contamination levels be monitored and reported?
• How is filter performance affected by ULSD, biodiesel, and new additive packages?
• Do these new fuels affect material and filter media selection decisions?
• How do we balance requirements for higher removal efficiency with the need for smaller filters and acceptable service intervals?
• How should fuel filter performance be measured and what new filter test standards are needed?

Dr. Barry Verdegan, Cummins Filtration
Dr. Christine Stanfel, Ahlstrom
Philip Johnson, Donaldson Company, Inc.
David M Stehouwer, Stehouwer Technical Services

Conference Information and Registration

Dr. Barry Verdegan, Cummins Filtration

Barry Verdegan received his Ph.D. degree in Water Chemistry from the University of Wisconsin-Madison. With 28 years experience in the industry, Barry is currently a Research Fellow for Cummins Filtration. As such, he is responsible for conducting research, training, interfacing with external technical organizations, and leading patent strategy.

He currently serves as Chair of the National Fluid Power Association's (NFPA) Contamination Technology Committee; as project leader for ISO 11171 calibration method for liquid automatic particle counters; and as 2nd Vice Chair of the American Filtration & Separations Society (AFS). He has taught numerous short courses on behalf of the University of Wisconsin Extension, AFS, NFPA, World Filtration Congress, SWRI International Filtration Conference, and other venues. Barry specializes in lube oil filters, hydraulic filters, fuel filtration, and particle counting. He has published more than 50 technical papers, including two book chapters, and holds 19 US patents.

Dr. Christine Stanfel, Ahlstrom

Christine Stanfel joined Ahlstrom in 2005 as a Project Engineer and assumed responsibility for R&D efforts in advanced filtration solutions, including North American diesel and biofuel filtration media development.

Prior to joining Ahlstrom, Christine was a Senior Scientist with EXXON Chemical Company with development responsibility for Heavy Duty Diesel lubricant soot control additives. She joined Weyerhaeuser in 1999 and worked as a Senior Scientist in Fine Paper Operations Support at Weyerhaeuser's Technology Center in Federal Way, WA. In 2000, she assumed a Senior Manufacturing Engineer role and managed product development, process optimization, and cost reduction efforts at Weyerhaeuser manufacturing facilities in Wisconsin, North Carolina, and Kentucky.

She represents Ahlstrom with the Society of Automotive Engineering (SAE), and participates in the American Filtration Society (AFS), Association of the Nonwoven Fabrics Industry (INDA), and the American Chemical Society (ACS).

Christine has a PhD in Physical Inorganic Chemistry from Stanford University, with research focused on characterization of iron-substituted zeolite cracking catalysts (collaboration with EXXON Research and Engineering), and biometallic-organic separations.

Philip Johnson, Donaldson Company, Inc.

Current position: Director of new liquid filtration business and product development.

• Graduated from the University of Newcastle upon Tyne with a BSc honors degree in Agricultural Engineering
• Worked for three years in the UK selling tribology testing equipment and engineering educational equipment to universities and research establishments
• He e migrated to South Africa in 1980 to take up a position to develop and implement management controls for underground mining repair work for the Gold Fields of South Africa mining company.
• Later working for Gold Fields he was made responsible developing and implementing contract commodity purchasing for the group; my first contract was to standardize and control the purchase of fuels and lubricants.
• In 1990 he started my own business as a Donaldson distributor, specializing in the sales of hydraulic filtration products and bulk lube and fuel filtration systems.
• In 1995 Donaldson Co Inc, purchased my business
• In 2000 Donaldson he was transferred to the USA to develop a new Industrial Hydraulic filtration business.
• In 2005 his role changed to directing the development of new liquid filtration businesses and new liquid filtration product development.

He has some 17 years experience in the filtration business and some 30 years experience allied to engineering repairs, oil and fuel distribution and tribology related industries.

David M Stehouwer, Stehouwer Technical Services

Dr. Stehouwer has a Ph.D. in Chemistry from the University of Michigan, and over 35 years experience in the fuels and lubricants industry. After spending time with Texaco, and General Motors Research, Dr. Stehouwer joined Cummins Inc. 26 years ago.

At Cummins he was active in the areas of improving oil quality and extending oil service intervals. Dr. Stehouwer spend some time with the Cummins Filtration Business Unit studying optimum filtration before returning to the Chemical Technology group where he devoted his efforts to understanding the low temperature properties of used oils and getting the CJ-4 category defined and approved. Since his retirement in 2002, he has worked for a number of clients on fuel and lubricant quality issues.

Conference Information and Registration