Hydrocarbon emissions from industrial release events in the Houston-Galveston area and their impact on ozone formation

Murphy, C.F.; Allen, David T.

doi:10.1016/j.atmosenv.2005.02.051

Cited by 100 publications

(79 citation statements)

References 3 publications

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“…Emission events above permitted levels are not included. The nature and impacts of these emission events have been described by Murphy and Allen (2005) and Nam, et al (2006).…”

Section: The Stochastic Emissions Inventory Generatormentioning

confidence: 99%

“…Nam et al (2006) developed computationally efficient photochemical models and examined the impact, on ozone formation in the HG area, of emission events using a stochastic characterization of the emission events described by Murphy and Allen (2005). While the previous studies provided important information on impacts of emission variability on ozone formation in the HG area, they are limited in the sense that the episodic emission events account for just a part of emission variability and contribute to just 10% of the mass of annual HRVOC emissions.…”

Section: Introductionmentioning

confidence: 99%

“…Murphy and Allen (2005) showed that depending on the time, location, and magnitude of the emission event, ozone concentrations can be increased by as much as 100 ppb. Nam et al (2006) performed additional analysis using a subdomain model, and showed that 1.5% of emission events would produce an additional 10 ppb of ozone, and 0.5% of events would produce more than 70 ppb of additional ozone.…”

Section: Introductionmentioning

confidence: 99%

“…However, observational data collected during the Texas Air Quality Study in 2000 showed that industrial emissions of hydrocarbons from NEGUs have significant temporal variability (Murphy and Allen, 2005;Vizuete, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Murphy and Allen (2005) have investigated characteristics of emission events in the HG area with a focus on highly reactive volatile organic compounds (HRVOCs; defined in Texas air quality regulation as ethylene, propylene, isomers of butene and 1,3-butadiene); characteristics of emission events examined included event magnitude, event duration and source types. These emissions events are discrete non-routine emissions events, of more than permitted amounts, with reporting required under Texas law.…”

Section: Introductionmentioning

confidence: 99%

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The effect of variability in industrial emissions on ozone formation in Houston, Texas

Webster

Nam

Kimura

et al. 2007

Atmospheric Environment

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Ambient observations have indicated that high concentrations of ozone observed in the Houston/Galveston area are associated with plumes of highly reactive hydrocarbons, mixed with NO x , from industrial facilities. Ambient observations and industrial process data, such as mass flow rates for industrial flares, indicate that the VOCs associated with these industrial emissions can have significant temporal variability. To characterize the effect of this variability in emissions on ozone formation in Houston, data were collected on the temporal variability of industrial emissions or emission surrogates (e.g., mass flow rates to flares). The observed emissions variability was then used to construct region-wide emission inventories with variable industrial emissions, and the impacts of the variability on ozone formation were examined for two types of meteorological conditions, both of which lead to high ozone concentrations in Houston. The air quality simulations indicate that variability in industrial emissions has the 1 potential to cause increases and decreases of 10-52 ppb (13-316%), or more, in ozone concentration. The largest of these differences are restricted to regions of 10-20 km 2 , but the variability also has the potential to increase region wide maxima in ozone concentrations by up to 12 ppb.

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“…Emission events above permitted levels are not included. The nature and impacts of these emission events have been described by Murphy and Allen (2005) and Nam, et al (2006).…”

Section: The Stochastic Emissions Inventory Generatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effect of variability in industrial emissions on ozone formation in Houston, Texas

Webster

Nam

Kimura

et al. 2007

Atmospheric Environment

Self Cite

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Formaldehyde column density measurements as a suitable pathway to estimate near‐surface ozone tendencies from space

et al. 2016

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In support of future satellite missions that aim to address the current shortcomings in measuring air quality from space, NASA's Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER‐AQ) field campaign was designed to enable exploration of relationships between column measurements of trace species relevant to air quality at high spatial and temporal resolution. In the DISCOVER‐AQ data set, a modest correlation (r2 = 0.45) between ozone (O3) and formaldehyde (CH2O) column densities was observed. Further analysis revealed regional variability in the O3‐CH2O relationship, with Maryland having a strong relationship when data were viewed temporally and Houston having a strong relationship when data were viewed spatially. These differences in regional behavior are attributed to differences in volatile organic compound (VOC) emissions. In Maryland, biogenic VOCs were responsible for ~28% of CH2O formation within the boundary layer column, causing CH2O to, in general, increase monotonically throughout the day. In Houston, persistent anthropogenic emissions dominated the local hydrocarbon environment, and no discernable diurnal trend in CH2O was observed. Box model simulations suggested that ambient CH2O mixing ratios have a weak diurnal trend (±20% throughout the day) due to photochemical effects, and that larger diurnal trends are associated with changes in hydrocarbon precursors. Finally, mathematical relationships were developed from first principles and were able to replicate the different behaviors seen in Maryland and Houston. While studies would be necessary to validate these results and determine the regional applicability of the O3‐CH2O relationship, the results presented here provide compelling insight into the ability of future satellite missions to aid in monitoring near‐surface air quality.

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Emission Source Characterization during an Ethylene Plant Shutdown

Wang

2014

Chem Eng & Technol

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To conduct a well‐planned plant shutdown, so as to reduce flare emissions for the sake of plant profitability and local environmental sustainability, one of the primary tasks is to perform comprehensive and precise accountings for flare emissions. Since the literature is still lacking systematic and quantitative studies, plant‐wide dynamic simulations are employed to simulate an ethylene plant shutdown and characterize its flare emission sources through which dynamic emission profiles of various emission species changing with respect to time are obtained. Plant shutdown emission inventories are enriched with details for point emission sources, and possible technical supports are provided to both industry and environmental agencies on evaluating and developing cost‐effective flare minimization strategies in the future.

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Hydrocarbon emissions from industrial release events in the Houston-Galveston area and their impact on ozone formation

Cited by 100 publications

References 3 publications

The effect of variability in industrial emissions on ozone formation in Houston, Texas

The effect of variability in industrial emissions on ozone formation in Houston, Texas

Formaldehyde column density measurements as a suitable pathway to estimate near‐surface ozone tendencies from space

Emission Source Characterization during an Ethylene Plant Shutdown

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