J. Ninomiya, A. Golovoy
Nov 1, 1969
Citations
0
Influential Citations
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Citations
Journal
Journal of the Air Pollution Control Association
Abstract
This study describes the variations in the chemical composition of the exhaust at various equivalence ratios (air-fuel ratios) when pure diisobutylene (2,4,4-trimethyl-l-pentene) is used as a fuel in a Labeco single cylinder engine. The exhaust hydrocarbon products from diisobutylene consist of two types: those which decrease as the equivalence ratio is increased: methane, ethylene, acetylene, diisobutylene; and those which exhibit a maximum near an equivalence ratio of 1, then decrease: propylene, propadiene, isobutyl-ene, ethane, 2-methyl-l-butene. The combustion of diisobutylene produces two olefins in low yield which are not observed in the combustion of isooctane fuel. These are 2,4-dimethyl-l,3-pentadiene, probably derived from pyrolytic decomposition of C7-alkyl radicals, and 3,5,5-trimethyl-2-hexene, probably arising from methyl radical addition to the alpha carbon of the parent fuel molecule. Comparison of the photochemical reactivity of dissobutylene exhaust to that of isooctane at a fuel-lean c...