logging in or signing up hansen Jolene Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 88 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: October 29, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript EPA NAQC 2005 San Francisco, CA: EPA NAQC 2005 San Francisco, CA From Nanograms to Milligrams: The Aethalometer™ AE-90 for direct Tailpipe Emissions Measurement of Carbonaceous Aerosol Particles Tony Hansen Magee Scientific Company Berkeley, CADiesel Exhaust - Listed Air Toxic: Diesel Exhaust - Listed Air Toxic Toxic Components : Specific Compounds require Specific Chemical Analyses Accompanying components may permit more rapid detection by optical means: Black Soot and UV-Absorbing MaterialAnalytical Premise: Analytical Premise Optically-absorbing material is a surrogate tracer for diesel exhaust. “Black” carbon (‘BC’, ‘EC’) “UV-absorbing material” (‘UVPM’) Optical analysis is fast, sensitive, can be performed in real time or on filter samples.Analytical Method - Optical Absorption: Analytical Method - Optical AbsorptionOptical vs. chemical analyses: Optical vs. chemical analyses “Harvard 6 Cities Study”Analytical Instrument : Aethalometer™: Analytical Instrument : Aethalometer™ While continuously collecting sample, measures optical absorption in real time at 2 wavelengths (880 nm and 370 nm UV) Converts optical absorption to mass concentration of BC and UVPM Real-time data: 1 second / 1 minute / 1 hourAnalytical Instrument : Aethalometer™: Analytical Instrument : Aethalometer™ 19-inch rack mount model“Portable” Aethalometer™: “Portable” Aethalometer™ Battery-powered: 1-, 2- or 7-wave opticsDiesel indoors: truck in exhibition hall: Diesel indoors: truck in exhibition hallA Diesel Repair Garage … in Antarctica: A Diesel Repair Garage … in AntarcticaBus Yard Exhaust - community impact: Bus Yard Exhaust - community impactOn The Bus in Boston: On The Bus in BostonOn The Train in Boston: On The Train in BostonDirect Tailpipe Emissions Analysis: Direct Tailpipe Emissions Analysis The Need: On-the-spot analysis for tailpipe BC & UV The Problem: Concentrations are too high for analysis based on continuous collection New Instrument: Aethalometer “Tailpipe Tester”: New Instrument: Aethalometer “Tailpipe Tester” Model ‘AE90’: Constructed in same chassis, identical optical analysisMethodology:: Methodology: Pull sample continuously through heated probe inserted into tailpipe. Bypass internally until ready for data. Switch sample stream through filter spot for a few seconds only. After collection, dry with warm filtered air. Perform optical analysis ‘on the spot’.Results : 3 to 15 mg/m3: Results : 3 to 15 mg/m3Results : 10 to 50 mg/m3: Results : 10 to 50 mg/m3 AE90 prototype ‘tailpipe’ Aethalometer BC (ug/m3) Diesel 3 Diesel 2: Higher idle, Load applied Successive Individual MeasurementsApplications: Captive fleet testing: Applications: Captive fleet testing Identify ‘High Emitters’ for remedial action Test effectiveness of engine tune-up: reduce source strength at exhaust manifold Test effectiveness of emissions reduction equipment (filters, catalytic converters etc.) reduce final emissions from tailpipeApplications: on-road vehicles: Applications: on-road vehicles Spot checks - identify ‘High Emitters’ Response to complaints Test trucks at highway inspection stations Routine vehicle testing for annual certificationApplications: Engine Manufacturers: Applications: Engine Manufacturers Engine R&D testbed measurements Real-time response to changing engine operation conditions Test effectiveness of fuel additives or downstream emissions clean-up devices Summary: Summary Black Carbon and UV-Absorbing Carbon are good surrogates for diesel exhaust. The ‘Tailpipe Tester’ AE-90 Aethalometer uses the established optical analysis method to measure BC and UVPM directly in the exhaust stream, ‘on the spot’.Acknowledgments: Acknowledgments Harvard School of Public Health National Institute of Chemistry, Slovenia For further information: www . mageesci . com You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
hansen Jolene Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 88 Category: Entertainment License: All Rights Reserved Like it (0) Dislike it (0) Added: October 29, 2007 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript EPA NAQC 2005 San Francisco, CA: EPA NAQC 2005 San Francisco, CA From Nanograms to Milligrams: The Aethalometer™ AE-90 for direct Tailpipe Emissions Measurement of Carbonaceous Aerosol Particles Tony Hansen Magee Scientific Company Berkeley, CADiesel Exhaust - Listed Air Toxic: Diesel Exhaust - Listed Air Toxic Toxic Components : Specific Compounds require Specific Chemical Analyses Accompanying components may permit more rapid detection by optical means: Black Soot and UV-Absorbing MaterialAnalytical Premise: Analytical Premise Optically-absorbing material is a surrogate tracer for diesel exhaust. “Black” carbon (‘BC’, ‘EC’) “UV-absorbing material” (‘UVPM’) Optical analysis is fast, sensitive, can be performed in real time or on filter samples.Analytical Method - Optical Absorption: Analytical Method - Optical AbsorptionOptical vs. chemical analyses: Optical vs. chemical analyses “Harvard 6 Cities Study”Analytical Instrument : Aethalometer™: Analytical Instrument : Aethalometer™ While continuously collecting sample, measures optical absorption in real time at 2 wavelengths (880 nm and 370 nm UV) Converts optical absorption to mass concentration of BC and UVPM Real-time data: 1 second / 1 minute / 1 hourAnalytical Instrument : Aethalometer™: Analytical Instrument : Aethalometer™ 19-inch rack mount model“Portable” Aethalometer™: “Portable” Aethalometer™ Battery-powered: 1-, 2- or 7-wave opticsDiesel indoors: truck in exhibition hall: Diesel indoors: truck in exhibition hallA Diesel Repair Garage … in Antarctica: A Diesel Repair Garage … in AntarcticaBus Yard Exhaust - community impact: Bus Yard Exhaust - community impactOn The Bus in Boston: On The Bus in BostonOn The Train in Boston: On The Train in BostonDirect Tailpipe Emissions Analysis: Direct Tailpipe Emissions Analysis The Need: On-the-spot analysis for tailpipe BC & UV The Problem: Concentrations are too high for analysis based on continuous collection New Instrument: Aethalometer “Tailpipe Tester”: New Instrument: Aethalometer “Tailpipe Tester” Model ‘AE90’: Constructed in same chassis, identical optical analysisMethodology:: Methodology: Pull sample continuously through heated probe inserted into tailpipe. Bypass internally until ready for data. Switch sample stream through filter spot for a few seconds only. After collection, dry with warm filtered air. Perform optical analysis ‘on the spot’.Results : 3 to 15 mg/m3: Results : 3 to 15 mg/m3Results : 10 to 50 mg/m3: Results : 10 to 50 mg/m3 AE90 prototype ‘tailpipe’ Aethalometer BC (ug/m3) Diesel 3 Diesel 2: Higher idle, Load applied Successive Individual MeasurementsApplications: Captive fleet testing: Applications: Captive fleet testing Identify ‘High Emitters’ for remedial action Test effectiveness of engine tune-up: reduce source strength at exhaust manifold Test effectiveness of emissions reduction equipment (filters, catalytic converters etc.) reduce final emissions from tailpipeApplications: on-road vehicles: Applications: on-road vehicles Spot checks - identify ‘High Emitters’ Response to complaints Test trucks at highway inspection stations Routine vehicle testing for annual certificationApplications: Engine Manufacturers: Applications: Engine Manufacturers Engine R&D testbed measurements Real-time response to changing engine operation conditions Test effectiveness of fuel additives or downstream emissions clean-up devices Summary: Summary Black Carbon and UV-Absorbing Carbon are good surrogates for diesel exhaust. The ‘Tailpipe Tester’ AE-90 Aethalometer uses the established optical analysis method to measure BC and UVPM directly in the exhaust stream, ‘on the spot’.Acknowledgments: Acknowledgments Harvard School of Public Health National Institute of Chemistry, Slovenia For further information: www . mageesci . com