Fuel borne catalyst composition for oxidative soot removal
AssigneeUmicore Specialty Materials Brugge
InventorsCarl VERCAEMST, Garrett MINNE, William Hendrik FAVEERE, Maxime VERMETTEN
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Abstract
The present invention provides fuel borne catalyst compositions for oxidative soot removal comprising a Ce (III) long-chain carboxylate in an organic solvent. Preferred embodiments provide a cerium composition for use as a soot reduction catalyst system, comprising: Ce (III) neodecanoate; Ce (III) carboxylate, wherein said carboxylate has a general formula RCOO-, wherein R is H or a Cl to C4 alkyl; neodecanoic acid; and an organic solvent. WO
Claims23
1-22. (canceled)
A cerium composition for use as a soot reduction catalyst comprising a Ce (III) long-chain carboxylate in an organic solvent, wherein said long-chain carboxylate has a general formula RLCOO-, wherein RL is a C6 to C24 alkyl.
A process for preparing a cerium composition, comprising the steps of:
- step a) contacting a long-chain carboxylic acid having a general formula RLCOO-, wherein RL is a C6 to C24 alkyl, with a Ce (III) compound under a non-oxidative atmosphere, wherein said Ce (III) compound comprises Ce (III) carbonate, Ce (III) hydroxycarbonate, Ce (III) hydroxide, Ce (III) oxyhydroxide, and/or Ce (III) oxide, and/or hydrates thereof, thereby obtaining a Ce (III) long-chain carboxylate;
- and
- step b) adding an organic solvent to the product obtained in step a).
A method for reducing emissions of particulates from diesel engines, said method comprising the steps of:
- operating a diesel engine with a fuel composition comprising a fuel, a Ce (III) long-chain carboxylate wherein said long-chain carboxylate has a general formula RLCOO-, wherein RL is a C6 to C24 alkyl in an organic solvent;
- passing an exhaust produced by combustion of the fuel and containing cerium oxide released from the fuel by combustion through a diesel particulate filter to collect particulate matter in said diesel particulate filter;
- and
- regenerating said diesel particulate filter by increasing the temperature to a temperature between 350° C. and 600° C.
Dependencies are inferred from the claim text.