Tag: Mobile Source Emissions
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Winter Measurements of Heavy-duty Vehicles to Characterize the Cold Temperature Effectiveness of Selective Catalytic Reductions Catalyst in Controlling Oxide of Nitrogen Emissions
The Salt Lake City region in Utah experiences periods of high particulate levels in the winter months due to the combination of its topography, winter atmospheric inversions and local emissions. Secondary nitrate particles comprise the dominant fraction of the particles in these episodes and are the result of the reaction of oxides of nitrogen (NOx)…
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Ammonia Emission Assessment from Diesel and Gasoline Engines under Utah Specific Conditions
To better understand the contribution of automobiles to Utah ammonia emissions, tailpipe ammonia (NH3) measurements will be taken in laboratory and on-road settings for an array of diesel and gasoline vehicles representative of Utah’s vehicle fleet. Principal Investigators: Randal S. Martin (USU), Joe Thomas (UDAQ), John Sohl (WSU) Funded for: $59,958
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Cold Start/Idling Emissions
Reducing automobile emissions has been a central component of the state’s plans to improve air quality. Unfortunately, there is little literature or data that identify the benefits or consequences from changes to the way individuals and fleets start their vehicles, particularly under Utah-specific conditions. A small, earlier study measured the pollutant and pollutant precursor emissions…