Optimising the Low Temperature Performance and Regeneration Efficiency of the Continuously Regenerating Diesel Particulate Filter (CR-DPF) System

2002 ◽  
Author(s):  
Ronny Allansson ◽  
Philip G. Blakeman ◽  
Barry J. Cooper ◽  
Howard Hess ◽  
Peter J. Silcock ◽  
...  
Keyword(s):  
Low Temperature ◽  
Diesel Particulate Filter ◽  
Particulate Filter ◽  
Diesel Particulate ◽  
Temperature Performance ◽  
Regeneration Efficiency ◽  
Low Temperature Performance

Design and Experiment on Premixing Burner

2014 ◽  
Vol 505-506 ◽  
pp. 297-300 ◽  
Author(s):  
Yao Wan ◽  
Heng Wu
Keyword(s):  
Particulate Matter ◽  
Diesel Exhaust ◽  
Diesel Particulate Filter ◽  
Particulate Filter ◽  
Treatment Technology ◽  
Diesel Particulate ◽  
Precise Control ◽  
Filter Regeneration ◽  
Regeneration Efficiency ◽  
Particulate Matter Pollution

Diesel particulate filter is an effective after-treatment technology that reduces particulate matter pollution in the diesel exhaust; however, the regeneration problem of the filter is limiting its commercialization process. This paper introduces the burning concept of premixing combustion into the burner of filter regeneration device and completes the design of premixing burner, combining the precise control of the regeneration process to achieve an effective regeneration of particulate filter, with the regeneration efficiency of 97.4%.

Comparative analysis on the effects of diesel particulate filter and selective catalytic reduction systems on a wide spectrum of chemical species emissions

2018 ◽  
Author(s):  
Z. Gerald Liu ◽  
Devin R. Berg ◽  
Thaddeus A. Swor ◽  
James J. Schauer‡
Keyword(s):  
Diesel Engine ◽  
Selective Catalytic Reduction ◽  
Diesel Particulate Filter ◽  
Catalytic Reduction ◽  
Wide Spectrum ◽  
Chemical Species ◽  
Pollutant Emissions ◽  
Particulate Filter ◽  
Diesel Particulate ◽  
Aftertreatment Systems

Two methods, diesel particulate filter (DPF) and selective catalytic reduction (SCR) systems, for controlling diesel emissions have become widely used, either independently or together, for meeting increasingly stringent emissions regulations world-wide. Each of these systems is designed for the reduction of primary pollutant emissions including particulate matter (PM) for the DPF and nitrogen oxides (NOx) for the SCR. However, there have been growing concerns regarding the secondary reactions that these aftertreatment systems may promote involving unregulated species emissions. This study was performed to gain an understanding of the effects that these aftertreatment systems may have on the emission levels of a wide spectrum of chemical species found in diesel engine exhaust. Samples were extracted using a source dilution sampling system designed to collect exhaust samples representative of real-world emissions. Testing was conducted on a heavy-duty diesel engine with no aftertreatment devices to establish a baseline measurement and also on the same engine equipped first with a DPF system and then a SCR system. Each of the samples was analyzed for a wide variety of chemical species, including elemental and organic carbon, metals, ions, n-alkanes, aldehydes, and polycyclic aromatic hydrocarbons, in addition to the primary pollutants, due to the potential risks they pose to the environment and public health. The results show that the DPF and SCR systems were capable of substantially reducing PM and NOx emissions, respectively. Further, each of the systems significantly reduced the emission levels of the unregulated chemical species, while the notable formation of new chemical species was not observed. It is expected that a combination of the two systems in some future engine applications would reduce both primary and secondary emissions significantly.

SUPERMET 2205

Alloy Digest ◽  
2004 ◽  
Vol 53 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Low Temperature ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Ferritic Stainless Steels ◽  
Nitrogen Levels ◽  
Temperature Performance ◽  
Low Temperature Performance

Abstract Supermet 2205 is a manual metal arc (MMA) electrode with enhanced chromium, molybdenum, and nitrogen levels. It is used for welding standard 22% Cr duplex austenitic/ferritic stainless steels. This datasheet provides information on composition, microstructure, hardness, and tensile properties as well as fracture toughness. It also includes information on low temperature performance as well as joining. Filing Code: SS-903. Producer or source: Metrode Products Ltd.

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