Regional
Ozone Impacts of Increased Natural Gas Use
in the Texas Power Sector and Development in the Eagle Ford Shale
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Abstract
The combined emissions and air quality
impacts of electricity generation
in the Texas grid and natural gas production in the Eagle Ford shale
were estimated at various natural gas price points for the power sector.
The increased use of natural gas in the power sector, in place of
coal-fired power generation, drove reductions in average daily maximum
8 h ozone concentration of 0.6β1.3 ppb in northeastern Texas
for a high ozone episode used in air quality planning. The associated
increase in Eagle Ford upstream oil and gas production nitrogen oxide
(NO<sub><i>x</i></sub>) emissions caused an estimated local
increase, in south Texas, of 0.3β0.7 ppb in the same ozone
metric. In addition, the potential ozone impacts of Eagle Ford emissions
on nearby urban areas were estimated. On the basis of evidence from
this work and a previous study on the Barnett shale, the combined
ozone impact of increased natural gas development and use in the power
sector is likely to vary regionally and must be analyzed on a case
by case basis