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AssigneeBaker Hughes Incorporated
InventorsBradley G. Harrell, Michael J. Zetlmeisl, Christopher Gallagher, Jianzhong Yang, Andrew J. McCallum
Estimating the term…
Exhaust emissions resulting from the combustion of hydrocarbon fuels in compression ignition engines may be reduced using a homopolymer that may be polyisobutylene, polypropylene, and/or hyperbranched polyalpha-olefins. The homopolymer may have a molecular weight of from about 1600 to about 275,000. Optionally, an alkyl nitrate such as 2-ethylhexylnitrate (2EHN), and/or a peroxide, such as hydrogen peroxide, may also be used together with the homopolymer. Both NOx and particulate matter emissions (PM) may be reduced using ppm quantities of the additive compositions; alternatively, NOx emissions may be lowered or reduced while PM emissions do not substantially increase.
A method for reducing emissions of a distillate fuel comprising adding to the distillate fuel an effective amount of an additive composition for reducing the emissions of the distillate fuel, the additive composition comprising a homopolymer selected from the group consisting of polyisobutylene, polypropylene, hyperbranched polymers, and mixtures thereof, where the homopolymer has a molecular weight of from about 1600 to about 275,000.
A method for reducing emissions of a distillate fuel comprising adding to the distillate fuel an additive composition comprising:
An additive composition for reducing the emissions of distillate fuels comprising:
A distillate fuel comprising:
A distillate fuel comprising:
Dependencies are inferred from the claim text.