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Methods for reducing particulate matter emissions from diesel engine exhaust using ethanol/diesel fuel blends in combination with diesel oxidation catalysts

A diesel engine, particulate matter technology, applied in the direction of adding non-fuel substances to fuel, combustion engine, machine/engine, etc., can solve the problems of high emissions, diesel engine efficiency and effectiveness damage, increase of particulate matter, etc.

Inactive Publication Date: 2007-10-10
O2DIESEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the lower the operating temperature, the higher the emissions of particulates, unburned hydrocarbons and carbon monoxide
In addition, the efficiency and effectiveness of diesel engines are compromised, thereby increasing fuel consumption and CO2 emissions
However, if the combustion in the engine is optimized for efficiency and performance, it will increase particulate matter and NO x Formation

Method used

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  • Methods for reducing particulate matter emissions from diesel engine exhaust using ethanol/diesel fuel blends in combination with diesel oxidation catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Preparation of Ethanol / Diesel Blends

[0059] Exemplary ethanol / diesel blends of the present invention were prepared by mixing fuel additives and ethanol / diesel blends. Specifically, a fuel additive composition was prepared by blending the components, oleic acid diethanolamide and ethoxylated oleic acid, in a 1:1 ratio. Subsequently, 1% of this fuel additive composition was added to a 7.7% ethanol / 92.3% diesel blend to obtain a stable, optically clear, stable microemulsion fuel blend in which the 92.3% diesel blend The product contains, for example, qualified diesel oil US No. 1 diesel oil, that is, 10% aromatic diesel oil containing 0.1% cetane improver.

Embodiment 2-D

[0060] Example 2 - Combination of DOC and Ethanol / Diesel Blends

[0061]The unexpected improvement of the method of the present invention in reducing PM in diesel engine exhaust can be demonstrated as follows. The US EPA Engine Dynamometer Schedule for Heavy-Duty Diesel Engines described in Appendix I of CFR Title 40 Part 86 can be used as the basic test sequence. Controlled emissions were determined during a cold cycle followed by four hot start transient test cycles, each separated by the required 20 minute soak time. During the three hot-start phases of the test, emission characteristic measurements for the 13-cycle test were obtained.

[0062] Exemplary ethanol / diesel blends include Canadian No. 1 and No. 2 diesel base fuels, and blends of each with 7.0% ethanol and 1% stabilizing additive. Diesel oxidation catalysts, including type AZ29, are certified under the US EPA Voluntary DieselRetrofit program. The catalyst has platinum loaded on a molecular sieve containing a d...

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PUM

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Abstract

Considerable progress has been made in recent years in reducing toxic exhaust emissions from diesel engines. Diesel oxidation catalysts for example are finding increasing use in reducing carbon monoxide, hydrocarbons and the soluble organic fraction of particulate matter in such emissions. Recent innovations in surfactant stabilizing additives now enable ethanol to be blended with diesel fuel in clear, stable solutions. On combustion, ethanol / diesel fuels generate less toxic emissions than the base diesel, but surprisingly when used in conjunction with diesel oxidation catalysts, particulate matter especially is dramatically reduced. The effectiveness of a diesel oxidation catalyst attached to a diesel engine exhaust is unexpectedly enhanced by the presence of ethanol in the diesel fuel.

Description

technical field [0001] The present invention relates to a method for reducing pollution, in particular to a method for reducing the content of pollutants in diesel engine exhaust. Background technique [0002] Diesel exhaust is composed of a mixture of many different toxic chemicals. Diesel engines rely on the heat generated during the compression cycle to ignite, unlike the electric spark in gasoline engines. Due to the compression required, diesel engines are heavier and bulkier than gasoline engines. Diesel engines run on less refined fuel, consuming less fuel per hour per horsepower. In diesel exhaust, the toxic chemical of greatest concern is nitrogen oxides (NO x , for example, nitrogen monoxide, nitrogen dioxide), carbon monoxide, sulfur dioxide, aldehydes (mainly formaldehyde, acetaldehyde and acrolein), and various hydrocarbon particles and unburned hydrocarbons. [0003] In this regard, diesel engine exhaust gases contain hydrocarbons formed during combustion t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/34B01J8/00C10L1/00B01D53/94C09K23/00C10L1/02C10L1/14C10L1/18C10L1/22C10L1/32C10L10/02F01N3/035F01N3/20F02M25/00
CPCC10L1/1824C10L1/191C10L1/2227F01N3/10F01N3/035C10L1/1881F02M25/00B01D53/944F02B3/06F02D19/085C10L1/1985F01N3/106C10L1/231F01N3/20C10L1/026C10L1/143B01F17/0085Y02T10/36F02D19/0655B01D2258/012F01N2430/04F02D19/082C10L1/14C10G2300/1011C10L1/224C10L1/328C10L1/1852C10L1/1811C10L10/02F02D19/0652B01D2251/21Y02P30/20Y02A50/20Y02T10/30C09K23/017
Inventor 艾伦·罗伯特·森普尔·雷罗伯特·莱斯利·哈利
Owner O2DIESEL CORP
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