Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance

Whitby, Robert; Gibbs, Richard E.; Johnson, R. E.; Hill, B.; Shimpi, Shirish A.; Jorgenson, Roy E.

doi:10.4271/820463

Cited by 13 publications

(6 citation statements)

References 3 publications

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“…1 " 13 The TEOM® system for ambient air monitoring utilizes an exchangeable filter cartridge on the end of a hollow tapered tube. The wider end of the tube is fixed.…”

Section: Discussionmentioning

confidence: 99%

Continuous PM-10 Measurements Using the Tapered Element Oscillating Microbalance

Patashnick¹,

Rupprecht²

1991

Journal of the Air & Waste Management Association

351

188

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“…1 " 13 The TEOM® system for ambient air monitoring utilizes an exchangeable filter cartridge on the end of a hollow tapered tube. The wider end of the tube is fixed.…”

Section: Discussionmentioning

confidence: 99%

Continuous PM-10 Measurements Using the Tapered Element Oscillating Microbalance

Patashnick¹,

Rupprecht²

1991

Journal of the Air & Waste Management Association

351

188

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“…12,13 Briefly, the TEOM measures the real-time particulate mass as a function of time by measuring the change in the resonant oscillation frequency of a tapered-glass tube connected to an exchangeable filter (called the mass transducer or "head"). As air containing particulate is pulled through the tube and the particulates are trapped on the filter, the mass of the system and, thereby, the resonant oscillation frequency changes.…”

Section: Particulate Mass Measurements Using the Teomsmentioning

confidence: 99%

An Evaluation of the Tapered Element Oscillating Microbalance Method for Measuring Diesel Particulate Emissions

Kelly

Morgan

2002

Journal of the Air & Waste Management Association

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We determined the usefulness of tapered element oscillating microbalances (TEOMs) for researchers and engineers involved with measuring diesel particulate mass. Two different test facilities were used for generating diesel particulates and comparing the TEOM to the commonly used U.S. Environmental Protection Agency (EPA) manual filter method. The EPA method is very labor-intensive and requires long periods of time to complete. The TEOM is an attractive approach because it has the potential to reduce the amount of time and labor required in diesel testing, as well as to provide real-time particulate-mass data that are not obtainable with the EPA method. It was found that the TEOM was a precise and easy-to-operate instrument that could measure the mass concentration (MC) of diesel particulate emissions in real time. Although the TEOM diesel particulate MC measurements were highly correlated with the manual filter measurements, the two techniques were not equivalent because the TEOM consistently reported MC results that were 20 -25% lower than those obtained using the manual filter technique. In conclusion, the TEOM can be used to increase test-cell throughput and to measure transient values of diesel particulate emissions at sites performing diesel-engine testing. However, unless EPA is able to certify the TEOM as an equivalent method, it cannot replace the manual filter method for diesel certification work.

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“…The tapered element oscillating microbalance has been successfully applied for real time measurement of transient total particulate emissions. 15 - 16 Clerc and Johnson have demonstrated the use of predictive models for real-time estimation of C o concentrations. 17 Thus far, procedures for selective real-time direct measurement of particulate phase organic carbon have not been described.…”

mentioning

confidence: 99%

Continuous Measurement of Diesel Particulate Emissions

Cha

Black

King

1988

JAPCA

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Real-Time Diesel Particulate Measurement Using A Tapered Element Oscillating Microbalance

Cited by 13 publications

References 3 publications

Continuous PM-10 Measurements Using the Tapered Element Oscillating Microbalance

Continuous PM-10 Measurements Using the Tapered Element Oscillating Microbalance

An Evaluation of the Tapered Element Oscillating Microbalance Method for Measuring Diesel Particulate Emissions

Continuous Measurement of Diesel Particulate Emissions

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