NOTE: Restrictions are in place to limit access to one or more of the files associated with this item. Authorized users must log in to gain access. Non-authorized users do not have access to these files.
Visit the Energy Systems Laboratory Homepage.
Controlling NOx to Obtain Offsets or Meet Compliance
MetadataShow full item record
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.
Mincy, J. E. (1992). Controlling NOx to Obtain Offsets or Meet Compliance. Energy Systems Laboratory (http://esl.eslwin.tamu.edu). Available electronically from