CHED 1060 |
| The removal of sulfer from gasoline is becoming an increasingly important environmental issue as petrueluem feedstocks currently in use for gasoline production have higher levels of sulfer than those previously employed. As such, increased levels of sulfer in fuels lead to increasing levels of sulfer dioxide polution and could, ultimately, lead to greater levels of acid rain. Cobalt pyridinoporphyrazine catalysts are compared to cobalt phthalocyanine, a catalyst commonly employed in petroleum refining. Mixtures of linear, branched, and cyclic thiols are aerobically oxidized in alkaline solution in the presence of each of the catalysts and the product disulfides are extracted and analyzed by GC/MS for identification. GC/FID is employed for quantification of remaining thiols after reaction to determine catalytic efficiency. Cobalt-3,4-pyridinoporphyrazine shows the greatest efficiency in thiol removal with more than 90% of most thiols removed during a 30-minute reaction period compared to 60% removal by cobalt phthalocyanine. Cobalt-2,3-pyridinoporphyrazine also shows improved efficiency compared to cobalt phthalocyanine, but to a lesser extent. |
|
Undergraduate Research Poster Session: Environmental Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |