Type of Document Master's Thesis Author Giavis, Konstantinos C. URN etd-09292009-020311 Title Catalytic control of individual hydrocarbons from a small utility gasoline engine Degree Master of Science Department Environmental Engineering Advisory Committee
Advisor Name Title Hughes, J. Martin Committee Chair Boardman, Gregory D. Committee Member Novak, John T. Committee Member Keywords
- Motor vehicles
Date of Defense 1993-07-15 Availability restricted Abstract
Recent approval of emission standards for small utility engines by the California Air Resources Board suggested that substantial reductions in emissions from small utility engines will soon be required. Although the 1994 standards can be met by simple engine modifications, the 1999 standards may require the use of emission control technologies such as catalytic converters because they are more stringent.
In this research catalytic control of individual hydrocarbons such as methane, ethylene, benzene, and toluene were evaluated. A platinum coated catalyst treated emissions from a 107cc, four-cycle gasoline engine loaded with a 1.4KW portable generator. Determination of emissions was performed at three different load levels: 0%, 50% and 92% of the engine rated load. Among the four hydrocarbons, toluene was oxidized as much as 60%, and benzene 40%, whereas ethylene remained unaffected by the catalyst. Also, a 5% to 10% methane oxidation occurred in one trial.
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