Record Display for the EPA National Library Catalog


Main Title Development of the Molten Carbonate Process to Remove Lead and Other Particulates from Spark Ignition Engine Exhausts.
CORP Author Atomics International, Canoga Park, Calif.
Year Published 1970
Report Number AI-70-47; PHS-CPA-70-3;
Stock Number PB-194 132
Additional Subjects ( Air pollution ; Exhaust gases) ; ( Air pollution control equipment ; Spark ignition engines) ; ( Carbonates ; Adsorbents) ; ( Lead ; Air pollution control equipment) ; Fused salts ; Scrubbers ; Lead compounds ; Cost estimates ; Lead halides ; Sulfur dioxide ; Nitrogen oxides ; Aerosols ; Field tests ; Corrosion ; Automobile exhaust ; Lead chloride ; Air pollution control
Library Call Number Additional Info Location Last
NTIS  PB-194 132 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 56p
The effectiveness of a molten alkali carbonate eutectic in removing lead compounds from gaseous mixtures was investigated. Some laboratory tests and one test of a device on an automobile were used in this investigation; results indicated that molten alkali carbonate scrubbers can be an effective method for removing lead and particulates from exhaust. The alkali metal carbonate eutectic is a basic low-melting, nonviscous, clear liquid that reacts chemically with acidic lead exhaust components and physically wets particulate matter. Tests have shown that the size of the lead chloride particulates produced in laboratory generation experiments approximated those found in automobile exhaust. Both impingement of the gas on the molten salt surface and contacting the gas with molten salt wetted-mesh scrubbers were shown to be effective lead removal techniques. The results suggest that a muffler replacement device could potentially remove nearly all of the lead from the exhaust. A conceptual device that could be retrofit to existing automobiles was designed. This conceptual muffler replacement unit would cost about $20 to fabricate and charge with salt. Tests of a preliminary molten carbonate device on an automobile showed that even before the melting temperature of the salt was reached, the demisting mesh and/or the salt on the mesh removed 80% of the lead from the exhaust. (Author)