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Controlling NOx to Obtain Offsets or Meet Compliance
Abstract
Even before the Clean Air Act Amendments of
1990, regulatory authorities monitored and regulated a
number of pollutants: lead, carbon monoxide, oxides of
sulfur, oxides of nitrogen, ozone and PM-10. The Clean
Air Act Amendments increased the focus on these
pollutants, mandating the reductions to specified limits.
Title I, Attainment and Maintenance of Ambient
Air Quality Standards, calls for reduction of the above
criteria pollutants in the atmosphere to, or below,
National Ambient Air Quality Standards (NAAQS) levels.
More than 100 areas of the United States have ozone
concentrations above the NAAQS standard, requiring
reduction of the ozone precursors, NOx and volatile
organic compounds (VOC). In most ozone non-attainment
areas, atmospheric ozone must be reduced by three
percent per year.
Although offsetting was used for compliance prior
to the Clean Air Act Amendments of 1990, the
amendments have quantified the amount of offsetting
required from existing sources to allow for the issuance
of permits on new facilities or expanded equipment. The
amount of the offset in ozone non-attainment areas is
determined by the level of non-attainment within that
area. In attainment areas the offset must yield a no net
increase for the facility. The EPA is also studying systems
for possible NOx emission reduction credit trading
which provides an economic incentive to reduce NOx
emissions below required levels. This paper discusses
NOx control in the hydrocarbon process industries.
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Citation
Mincy, J. E. (1992). Controlling NOx to Obtain Offsets or Meet Compliance. Energy Systems Laboratory (http://esl.eslwin.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /92199.