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The removal of soot in the lubricating sumps of diesel engines is a formidable task, further compounded by the introduction of Exhaust Gas Recirculation (EGR). Efficient removal of soot would help ensure engine durability and engine performance while increasing oil drain intervals thus reducing maintenance costs. This paper describes a method by which soot can be separated from the oil with the application of an electric field by utilizing the small electrical charge on the soot particles. The electric field is applied to a network of electrodes that support an open porous network which stabilizes the weakly bound soot cake. Significantly higher filtration efficiency was achieved as compared to mechanical particulate filtration and centrifugation. The paper also discusses the controlling conditions while detailing the performance testing at both a bench scale level and pilot scale level.

The molecular filtration of sulfur components in ultra low sulfur diesel (ULSD) fuel is described. A comprehensive screening of potential sulfur removal chemistries has yielded a sorbent which has the capability to efficiently remove organo-sulfur components in ULSD fuel. This sorbent has been used to treat ULSD fuel on a heavy duty engine equipped with NOx adsorber after-treatment technology and has been shown to lengthen the time between desulfation steps for the NOx adsorber. The fuel properties, cetane number and aromatics content, etc., have not been changed by the removal of the sulfur in the fuel with the exception of the lubricity which is reduced.

Extensive research has been carried out worldwide to find better plastic fuel barrier materials to meet increasingly stringent requirements due both to more restrictive emissions legislation and to the fact that widely different gasoline compositions are being used. This review accounts for the most recent progress in the field. Starting from a discussion of the fundamental aspects on permeation through polymer media, it also highlights current advancement in the areas of chemical surface treatment, multi-layered assembling and blending.

The removal of toxic, corrosive, irritant, and odorous gases is a key strategy in improving air quality in any closed space. The technologies of granulated activated carbon or chemically impregnated dry media are commonly employed to address this issue. Both of these methods have their limitations in manufacturability, volume of space, and/or pressure drop associated with use in a given application. A new air quality technology has been developed which integrates liquid based chemisorption gas treatment with a shaped fiber media carrier. The patented wicking fiber shape holds more than its own weight in active reagents within intra-fiber channels. While the liquid volume is captured and retained through capillary action, a large surface area of the chemisorptive liquid is presented to the air flow for reaction and neutralization of the target contaminant gases. The wicking fibers may be implemented as fiber bundles, woven materials, or as non-wovens.