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Moran, John B.
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The Environmental Implications of Manganese as an Alternate Antiknock

U.S. Environmental Protection Agency-John B. Moran
Published 1975-02-01 by SAE International in United States
Methylcyclopentadienylmanganese tricarbonyl (MMT) while originally marketed in the late 50's and early 60's as a secondary antiknock to leaded fuels, is presently being marketed as a primary antiknock targeted for the EPA required lead-free gasoline grade tailored for use in catalyst-equipped vehicles. This paper reviews and discusses new information related to the effect of manganese gasoline additives on the performance of catalysts, regulated emissions, and several currently unregulated emissions. In addition, estimates of human exposures to automotive-generated manganese particulate and the toxicological characteristics of manganese are discussed as they related to an assessment of the potential public health consequences should manganese additives come into widespread use. EPA's position regarding the use of manganese additives is presented and discussed.
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Sulfate Emissions from Catalyst Cars -A Review

United States Environmental Protection Agency-Ronald L. Bradow, John B. Moran
Published 1975-02-01 by SAE International in United States
A review of the available data on sulfate emissions methods and emissions rates from both catalyst-equipped and noncatalyst cars has been made. Air-dilution methods of various sorts appear to give similar sulfates emissions results, comparable with those obtained by controlled condensation procedures. Mobile source SO2 measurements technology requires much more attention. At present, only the hydrogen peroxide oxidation to sulfate has been demonstrated to give reliable results. Summaries of several hundred catalyst and non-catalyst emission rates are treated to estimate California and 49-state emissions. A cruise-mode emission rate of about 0.03 g/mile appears appropriate for both monolithic and pelleted catalysts in 49-state cars.
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Assuring Public Health Protection as a Result of the Mobile Source Emissions Control Program

Environmental Protection Agency-John B. Moran
Published 1974-02-01 by SAE International in United States
Provisions of the Clean Air Act Amendments are explained in this paper. Carbon monoxide, hydrocarbons, and oxides of nitrogen are specifically regulated emissions; fuels, fuel additives, and lubricants can be regulated, and a host of nonregulated emissions can be regulated on need.In examining these three categories of pollutants, the paper describes the health consequences of regulated and nonregulated emissions, the effects of various components on nonregulated emissions, and the effect of advanced control systems on regulated and nonregulated emissions. Finally, current EPA research on fuel and fuel additive registration, emissions characterization, health, and surveillance is discussed.
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