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Reduced-emissions combustion utilizing multiple-component metallic combustion catalyst

A combustion catalyst and catalyst technology, applied in combustion air/combustion-air treatment, fuel additives, combustion engines, etc., can solve the problem of increasing the number of ultra-fine particles, and achieve the effect of improving performance

Inactive Publication Date: 2008-04-09
CLEAN DIESEL TECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there was no significant increase in the number of ultrafine particles for bimetals used at 0.5 / 7.5 or 0.25 / 4 ppm

Method used

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  • Reduced-emissions combustion utilizing multiple-component metallic combustion catalyst
  • Reduced-emissions combustion utilizing multiple-component metallic combustion catalyst
  • Reduced-emissions combustion utilizing multiple-component metallic combustion catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This example describes the preparation of a low emission diesel fuel according to a preferred aspect of the invention, using an alternative grade 55 aviation kerosene (JetA, similar in boiling point and viscosity) from the Colonial Pipeline Company analyzed above. No. 1 Diesel), the fuel was blended with additives (100 ppm of TFA 4690-C detergent, 225 ppm of the Texaco lubricity additive) and a fuel-borne catalyst (FBC) containing platinum as 0.15 ppm platinum provided by COD and 7.5 ppm cerium provided as cerium hydroxyoleate propionate complex (solution containing 40% by weight cerium). These ppm values ​​are again weight of metal in milligrams per volume of fuel in liters. This fuel was used in the 1998DDC Detroit Diesel Series 60 400 hp engine test, and compared to the No. 2 fuel for highways or CARB ULSD (California Air Resources Board Ultra Low Sulfur Diesel )) The fuel showed significantly improved results.

[0047] The test results are summarized in the table ...

Embodiment 2

[0051] This example presents the results of a platinum and cerium bimetallic FBC used at a total of 4 ppm in a commercially available ultra-low sulfur diesel engine relative to conventional sulfur fuel and a reference ULSD, and the results of tests performed on a 1998 DDC Series 60 engine. The results are summarized in the table below:

[0052] Emissions results in a 1998 DDC Series 60 engine on various fuels

[0053] (repeated hot FTP test)

[0054] (g / hp-hour)

[0055] The table above shows, for the treated ultra-low sulfur diesel (ULSD) fuel relative to the reference ULSD without additives, the FBC treated fuel in HC (54%), NOx (5%), PM (25%) and Improvements in economy (1.4%).

Embodiment 3

[0057] Three 20 minute hot transient test cycles were performed on a 1990 DTA-466 International 7.6 liter engine. NOx, NO and NO measured in g / hp-hr 2 and the average emissions of particulates are shown in the table below.

[0058] Baseline emissions for commercially available No. 2 D (>300ppm sulfur) and ULSD (2 Emissions, as percentage of total NOx species, were 17 and 18% of total nitrogen species. Particles are slightly lower for ULSD at 0.244 g / hp-hr.

[0059] Installed in exhaust with 75g / ft 3 A heavily catalyzed diesel oxidation catalyst (HCDOC) loaded with PGM and with 14g / ft 3 Platinum Group Metals (PGM) loading A lightly catalyzed wire mesh filter (LCWMF) used with a bimetallic platinum / cerium FBC at 0.5 / 7.5ppm in ULSD fuel produced a 59% reduction in particulates but increased NO 2 Emissions amount to 58% of total nitrogen oxide species. The cerium additive was cerium hydroxypropionate oleate and the platinum additive was platinum COD.

[0060] When the DOC wa...

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Abstract

Diesel fuels containing low concentrations of specific bimetallic or trimetallic fuel-borne catalysts reduce particulates and other emissions without the use of after treatment devices, such as filters or catalysts, e.g., diesel particulate filters (DPF's) or diesel oxidation catalysts (DOC's) in the case of diesel engines. By utilizing a fuel containing a fuel-soluble catalyst comprised of platinum and at least one additional metal comprising cerium and / or iron, production of pollutants of the type generated by incomplete combustion is reduced. Preferred fuel borne catalyst levels will be low, e.g., from 0.05 to 0.5 ppm for platinum and 3 to 8 ppm for cerium and / or iron, thereby providing effective engine out emissions reductions without any aftertreatment device. Performance of lightly catalyzed aftertreatment devices will be improved with the subject invention.

Description

Background technique [0001] The present invention relates to new compositions and new methods for improving the efficiency of fossil fuel combustion sources. The use of fuels containing a fuel-soluble catalyst comprising platinum and at least one additional metal reduces the generation of pollutants of the type produced by incomplete combustion, such as particulates, unburned hydrocarbons and carbon monoxide. [0002] Diesel engines have a number of important advantages over Otto-type engines. Among them are fuel economy, easy maintenance and long life. However, from an emissions standpoint, they have more serious problems than their spark-ignition counterparts. Emissions concerns concern particulates, oxides of nitrogen (NOx), unburned hydrocarbons (HC) and carbon monoxide (CO). NOx emissions tend to increase when engine operating improvements are made to reduce particulates and unburned hydrocarbons in diesel engines. [0003] Aftertreatment devices, such as Diesel Part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/30
CPCC10L10/02C10L1/301C10L10/06F01N2430/04F02D19/0652Y02T10/36F01N3/023F01N3/106F02M25/14C10L1/189C10L1/1886C10L1/305C10L1/125F01N3/035F02M27/02Y02T10/121C10L1/1814C10L1/1888C10L1/10C10L1/1241C10L1/1881Y02T10/12Y02T10/30C10L1/30
Inventor 詹姆斯·M·瓦伦丁巴里·N·斯普拉格杰里米·D·彼得-霍布林
Owner CLEAN DIESEL TECHNOLOGIES