... test systems. In this paper we present a full MVEM taking into account all engine components: air system (air filter, turbocharger, charge air cooler, throttle valve, intake and exhaust manifolds, EGR valve, and turbine), oxidation catalyst (OxiCat), and diesel particulate filter (DPF). Additionally...

...Maruthi Devarakonda; Russell Tonkyn; Diana Tran; Jong Lee; Darrell Herling Urea-selective catalytic reduction (SCR) catalysts are regarded as the leading NO x aftertreatment technology to meet the 2010 NO x emission standards for on-highway vehicles running on heavy duty diesel engines. However...

... was the catalyst being poisoned by organic silicon compounds. Organic silicon was introduced from the organosilicon sealant used at the junctions of low-pressure turbines. We also found that a boehmite rich catalyst was deactivated more easily by organic silicon than gamma alumina because boehmite had numerous...

...Amy M. Peterson; Po-I Lee; Ming-Chia Lai; Ming-Cheng Wu; Craig L. DiMaggio; Simon Ng; Hiyang Tang This paper compares 20% biodiesel (B20-choice white grease) fuel with baseline ultra low sulfur diesel (ULSD) fuel on the emissions and performance of a diesel oxidation catalyst (DOC) and diesel...

...Gyaebyung Yang; Daejong Park; Chun Taek Kim; Sejin Kwon Hydrazine monopropellant is often used with a spontaneous catalyst a high-performance aircraft emergency power unit (EPU) and in aerospace propulsion; however, it is toxic and requires special handling. A hydrogen peroxide ( H 2 O 2 ) -based...

... and efficiency of heavy duty spark ignition engines. With stoichiometric conditions, a three way catalyst can be used, which keeps the regulated emissions at very low levels. The Lambda window, which results in very low emissions, is very narrow. This issue is more complex with transient operation, resulting...

...Junghwan Kim; Rolf D. Reitz; Sung Wook Park; Kian Sung Experimental and numerical studies were performed to investigate the simultaneous reduction in NO x and CO for stoichiometric diesel combustion with a three-way catalyst. A single-cylinder engine was used for the experiments and KIVA...

...) become unacceptable. Production diesel oxidation catalysts (DOCs) are effective in oxidizing the increased levels of HC and CO under lean combustion conditions. However, the low-temperature∕high CO combination under rich PCI conditions, designed as a lean N O x trap (LNT) regeneration mode, generally...

... active tip cooling, or costly materials and catalysts. To gain an understanding of how this flame stabilization mechanism remains robust throughout a large range of Reynolds numbers, laboratory experiments were performed to characterize the flowfield of natural-gas flames at simulated partial load...

... 2005 gas turbines nitrogen compounds combustion carbon compounds catalysts In the last ten years, gas turbine operators have had to comply with increasingly strict exhaust emissions regulations. The exhaust constituents of greatest concern are oxides of nitrogen NO x...

... of approximately 598 K (325°C/617°F) and operated at simulated 100% and 50% load conditions without a preburner. At high pressure, the maximum catalyst surface temperature was similar to that observed during atmospheric pressure testing and considerably lower than the surface temperature expected in lean-burn...

... reactions mass transfer heat transfer catalysts heat of reaction temperature engineering computing As a consequence of deregulation of energy markets in recent years, distributed power sources have become widespread in some parts of the world. Micro gas turbines (MGTs) are small-scale power...

... -formation varied strongly over the two different catalysts. Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER . Paper presented...

... the emission system behavior by using an exhaust system heat conservation and catalyst chemical kinetic submodel. The resulting governing equations are solved numerically. Good agreements were found between the numerical predictions and experimental measurements under both steady-state and transient conditions...

... catalyst inlet temperatures and low NO x over the operating load range. The fuel-air mixer incorporates counter rotating swirlers to mix the catalyst fuel and air to achieve the desired uniformity. The patented catalyst design is composed of specially coated metal foils. Overall engine performance...

...T. Nakagaki; T. Ogawa; K. Murata; Y. Nakata The purpose of the present work is to establish the design method of methanol steam-reformer for application to chemical recuperation in a gas turbine system. The reaction rate of the methanol steam-reforming was measured with a small amount of catalyst...

... Turbine Systems (ATS) program. Operational issues in implementing catalytic combustion and the current needs for research in catalyst durability and operability are also discussed. This paper indicates how recent advances in reactor design and catalytic coatings have made catalytic combustion a viable...

...S. Bhattacharyya; R. K. Das Catalysts based on X-zeolite have been developed by exchanging its Na + ion with Copper ions and its effectiveness in reducing NO x in an actual SI engine exhaust has been tested. Unlike noble metals, the doped X-zeolite catalysts, studied here, exhibit significant NO x...

...G. N. Coppage; S. R. Bell Reduction of cold-start emissions using electrically-heated catalyst (EHC) technology was the focus of this work. Comprehensive emission measurements of CO, CO 2 , NO x , and total hydrocarbons (THC) are reported for a spark-ignited engine operated on baseline gasoline...

...G. C. Koltsakis; A. M. Stamatelos Modern hydrocarbon adsorbers for gasoline engines are promising candidates for cold start emission control. In this paper, the flow and heat transfer in a typical complex system, comprising a “barrel type” adsorber and two conventional catalysts is studied...