Title page for ETD etd-09292009-020311

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
  • Motor vehicles
Date of Defense 1993-07-15
Availability restricted

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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