Optoacoustic measurements of diesel particulate emissions

1979 ◽  
Vol 50 (12) ◽  
pp. 7880-7882 ◽  
Author(s):  
Fred R. Faxvog ◽  
David M. Roessler
Keyword(s):  
Particulate Emissions ◽  
Diesel Particulate

The Morphology and Crystallography of Diesel Particulate Emissions

1981 ◽  
Vol 39 ◽  
pp. 148-149
Author(s):  
R. Stevenson
Keyword(s):  
Diffraction Pattern ◽  
Carbon Films ◽  
Particulate Emissions ◽  
Diesel Particulate ◽  
Amorphous Carbon Films ◽  
Turbostratic Carbon ◽  
Diesel Particles ◽  
Tem Mode ◽  
Exhaust Stream ◽  
Diffraction Patterns

A study has been made of the morphology and crystallography of particulate emissions from indirect injection diesel engines. This particulate matter consists substantially of carbon (although hydrocarbons can be extracted with solvents). Samples were collected in a diluted exhaust stream on amorphous carbon films and examined in a JEM-200C electron microscope operated in the TEM mode with an accelerating voltage of 200 KV.The morphology of the diesel particles, as shown in Fig. 1, markedly resembles carbon blacks and consists of an agglomeration of quasispherical subunits arranged in chains or clusters. Only limited changes in morphology were observed as the number of subunits in the particle increased (although larger particles tended to be more cluster-like than the extended chain shown in Fig. 1). However, a dramatic effect of the number of subunits was observed on the character of the diffraction pattern. Smaller particles yielded a diffraction pattern consisting of very diffuse rings typical of turbostratic carbon; the diffraction patterns from the larger particles, however, although qualitatively similar, exhibited much sharper and less diffuse ring patterns.

Endocrine disrupting chemical emissions from combustion sources: diesel particulate emissions and domestic waste open burn emissions

2005 ◽  
Vol 39 (5) ◽  
pp. 801-811 ◽  
Author(s):  
Sukh Sidhu ◽  
Brian Gullett ◽  
Richard Striebich ◽  
Joy Klosterman ◽  
Jesse Contreras ◽  
...  
Keyword(s):  
Particulate Emissions ◽  
Domestic Waste ◽  
Diesel Particulate ◽  
Endocrine Disrupting Chemical ◽  
Endocrine Disrupting ◽  
Combustion Sources

Regeneration Characteristics of Diesel Particulate Filters Under Transient Exhaust Conditions

2005 ◽  
Author(s):  
M. Rizwan Khan ◽  
Tariq Shamim
Keyword(s):  
Steady State ◽  
Soot Oxidation ◽  
Effect Of Temperature ◽  
Particulate Emissions ◽  
Computational Investigation ◽  
Diesel Particulate ◽  
Diesel Particulate Filters ◽  
Particulate Filters ◽  
Fundamental Understanding ◽  
Careful Design

Particulate emissions from diesel engines, which have hazardous effects on living beings and environment, can be controlled by employing diesel particulate filters (DPFs). The DPF cleans the exhaust by physical trapping of the particulates. A major challenge in developing a DPF with wider applications is its lower durability. The filter durability may be increased by careful design of regeneration (soot oxidation) strategies. The regeneration characteristics of a DPF under steady state conditions are well known. However, during a typical driving cycle, a DPF is subjected to highly transient conditions due to changes in driving modes. These transients result in fluctuations of exhaust flow rate, gas composition and temperature. Such modulating exhaust conditions make the DPF performance and regeneration characteristics differ significantly from that under steady state conditions. The objective of this paper is to investigate the thermal and catalytic regeneration characteristics of DPF under transient exhaust conditions. In this work, a computational investigation is conducted to determine the effect of temperature and exhaust flow modulations on a DPF. The paper contributes to a better fundamental understanding of the filter’s performance under transient driving conditions.

Diesel particulate emissions and the implications for the soiling of buildings

1991 ◽  
Vol 11 (4) ◽  
pp. 243-254 ◽  
Author(s):  
Trudie Mansfield ◽  
Ron Hamilton ◽  
Bryan Ellis ◽  
Peter Newby
Keyword(s):  
Particulate Emissions ◽  
Diesel Particulate

Time Resolved Characterization of Diesel Particulate Emissions. 1. Instruments for Particle Mass Measurements

2001 ◽  
Vol 35 (4) ◽  
pp. 781-787 ◽  
Author(s):  
H. Moosmüller ◽  
W. P. Arnott ◽  
C. F. Rogers ◽  
J. L. Bowen ◽  
J. A. Gillies ◽  
...  
Keyword(s):  
Particle Mass ◽  
Particulate Emissions ◽  
Mass Measurements ◽  
Time Resolved ◽  
Diesel Particulate
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