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- Mellqvist, Johan, 1965, et al.
(författare)
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Quantification of Gas Emissions from Refineries, Gas Stations, Oil Wells and Agriculture using Optical Solar Occultation Flux and Tracer Correlation Methods
- 2016
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Ingår i: AGU Fall meeting San Francisco Dec 2016.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Industrial volatile organic compound (VOC) emissions may contribute significantly to ozone formation. In order to investigate how much small sources contribute to the VOC concentrations in the Los Angeles metropolitan area a comprehensive emission study has been carried out on behalf of the South Coast Air Quality Management District (SCAQMD). VOC emissions from major sources such as refineries, oil wells, petrol stations oil depots and oil platforms were measured during September and October 2015 using several unique optical methods, including the Solar Occultation Flux method (SOF) and tracer correlation technique based on extractive FTIR and DOAS combined with an open path multi reflection cell. In addition, measurements of ammonia emissions from farming in Chino were demonstrated. The measurements in this study were quality assured by carrying out a controlled source gas release study and side by side measurements with several other techniques. The results from the field campaign show that the emissions from the above mentioned sources are largely underestimated in inventories with potential impact on the air quality in the Los Angeles metropolitan area. The results show that oil and gas production is a very significant VOC emission source. In this presentation the techniques will be discussed together with the main results from the campaign including the quality assurance work.
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| 3. |
- Mellqvist, Johan, 1965, et al.
(författare)
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Quantification of stack emissions from marine vessels
- 2016
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Ingår i: Air and Waste Management Association - Air Quality Measurement Methods and Technology Conference 2016. - 9781510822535 ; , s. 416-421
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Konferensbidrag (refereegranskat)abstract
- Ship emission data from fixed and mobile platforms were obtained during 5 weeks in October and November of 2015. The main objective was to study the "real life" ship emissions of gases and particles in different modes of ship operation in the vicinity of the harbor, from open sea to berth. These emissions can be used to calculate the impact of shipping activities on air quality in the LA basin. Since ships are supposed to run on low sulfur fuel it is interesting how the new low sulfur fuel impacts also emissions of particles, in addition to sulfur. During the project we found several ships running on high sulfur fuel. During the presentation we will describe the method and show example of data from the project.
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| 4. |
- Mellqvist, Johan, 1965, et al.
(författare)
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Remote Quantification of Stack Emissions from Marine Vessels
- 2016
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Ingår i: A&WMA’s 109th Annual Conference & Exhibition, New Orleans, Louisiana, June 2016. - 1052-6102. ; 1, s. 579-583
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Konferensbidrag (refereegranskat)abstract
- Stationary and mobile (on-vessel) measurements of ship specific emission factors and total emission were carried out in the port of Los Angeles and Long Beach. The measurement techniques developed to characterize individual ship emissions were presented. The data were obtained with a zenith DOAS technique for NO 2 and "in-situ" sniffer technique for SO 2 , NO x , CO 2 , and particulates. The measured particle properties corresponded to particulate number, particulate mass, and black and organic carbon. Total emissions of NO 2 from the harbors were also obtained through mobile optical zenith sky measurements. The potential VOC emissions were investigated when fueling the ships and other VOC sources in the harbor using techniques like the Solar Occultation Flux technique. This is an abstract of a paper presented at the A & WMA's 109th Annual Conference & Exhibition (New Orleans, LA 6/20-23/2016).
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