||Assessment of automotive sulfate emission control technology /
Bachman, K. C. ;
Holt, E. L. ;
Leppard, W. R. ;
Wigg., E. E.
||Exxon Research and Engineering Co., Linden, N.J.;Environmental Protection Agency, Ann Arbor, Mich. Emission Control Technology Div.
|| Environmental Protection Agency, Office of Air Waste Management, Office of Mobile Source Air Pollution Control, Emission Control Technology Division ; For sale by the Natural Technical Information Service,
Automobiles--Motors--Exhaust gas. ;
Air quality management.
Air pollution control ;
Sulfur dioxide ;
Exhaust emissions ;
Calcium oxides ;
Diesel fuels ;
Catalytic converter ;
Laboratory equipment ;
Gas analysis ;
Aluminum oxide ;
Chemical reactions ;
Activated carbon ;
Catalytic reactors(Exhaust systems) ;
||Region 3 Library/Philadelphia, PA
||Region 4 Library/Atlanta,GA
||Research Triangle Park Library/RTP, NC
||NVFEL Library/Ann Arbor, MI
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||xii, 202 pages : illustrations ; 28 cm.
This report includes a literature search to determine possible reactions involving sulfur in automotive exhaust systems, an assessment of the effect of various operating parameters (i.e. exhaust oxygen level) on the level of sulfate emissions, and a feasibility study on the use of sorbents as traps to eliminate sulfate from the exhaust gas before release to the atmosphere. It was discovered in the study that exhaust oxygen level and catalyst age were major variables affecting level of sulfate emissions. Other variables, such as noble metal composition, noble metal loading, catalyst temperature and residence time of the exhaust gas over the catalyst had little or no significant effect on sulfate emissions. It was also discovered that only calcium based materials (such as calcium oxide) removed sulfate efficiently enough with little physical degradation during laboratory testing of potential sorbents. Vehicle tests using the most promising sorbents as traps showed high sulfate removal but with unacceptably high exhaust back pressures.
Contract 68-03-0497. "May 1976." "EPA/460-3-76-017." Includes bibliographical references.