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US 8,757,106 B2Granted
High cetane petroleum fuels
AssigneePhillips 66 Company
InventorsGarry Clyde Gunter, Edward T. Casey
Life of this patent
Estimating the term…
Abstract
A high-efficiency diesel fuel and method of combustion that reduces emissions. The diesel engine can operate in pre-mixed charge compression ignition (PCCI) combustion. The method can involve injecting high-efficiency diesel fuel at from −8 to 0 degrees After Top Dead Center (ATDC), combusting the fuel, and operating the engine with an exhaust gas recirculation (EGR) of from 20 to 60%.
Claims24
A high-efficiency diesel fuel comprising:
- a) increased short-chain paraffin molecules,
- b) long chain paraffins with one to five isomeric short chain methyl, ethyl, propyl, or isopropyl side chains,
- wherein the ratio of isoparaffins to total paraffins is greater than 0.9.
A high-efficiency diesel fuel blending agent comprising:
- a) increased short-chain paraffin molecules, and
- b) long chain paraffins with one to five isomeric short chain methyl, ethyl, propyl, or isopropyl sidechains,
- c) wherein the ratio of isoparaffins to total paraffins is greater than 0.99 isoparaffins to total paraffins.
A method for reducing the emissions of a diesel engine, the method comprising
- a) combusting a fuel, wherein the fuel is a high-efficiency diesel fuel comprising increased short-chain paraffin molecules and long chain paraffins with one to five isomeric short chain methyl, ethyl, propyl, or isopropyl sidechains, wherein the ratio of isoparaffins to total paraffins is greater than 0.9, wherein the high-efficiency diesel fuel is injected at from −8 to 0 degrees After Top Dead Center (ATDC), and
- b) operating the engine with an exhaust gas recirculation (EGR) of from 20 to 60%.
Dependencies are inferred from the claim text.