Dialkyl Ether Fuel Blends for Compression Ignition Engine Fouling
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Solution Overview
Problem
Current biofuel formulations for compression ignition engines, such as those using fatty acid methyl esters, face limitations due to fouling issues, high production costs, and lower greenhouse gas emission reductions, particularly when used at higher concentrations.
Innovation Solution
A compression ignition fuel formulation comprising C4 to C8 dialkyl ethers, naphtha fuel components, and low boiling hydrocarbons, which allows for higher biofuel concentrations without fouling or engine oil dilution, reducing greenhouse gas emissions and soot emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If FAMEs are used at higher concentrations in diesel fuel, then greenhouse gas emission reduction is improved, but injector fouling and engine oil dilution occur
Solution Approach 1:
The patent uses C4 to C8 dialkyl ethers as intermediary compounds that prevent FAMEs from accumulating in engine oil and fouling injectors. The ethers act as a mediating substance that allows higher concentrations of FAMEs to be used without the harmful side effects, resolving the contradiction between emission reduction and component protection.
Solution Approach 2:
The invention creates a composite fuel formulation combining FAMEs, C4 to C8 dialkyl ethers, and optionally naphtha and low boiling components. This composite approach allows the beneficial properties of FAMEs (high greenhouse gas reduction) to be combined with the protective properties of dialkyl ethers (preventing fouling and dilution), achieving both goals simultaneously.
2Quantity of substance
If FAME production is increased to meet higher concentration requirements, then biofuel availability is improved, but production cost increases
Solution Approach 1:
The patent changes the chemical composition parameters of the fuel by introducing C4 to C8 dialkyl ethers with specific molecular structures and properties. This parameter change allows the fuel to achieve higher effective biofuel utilization without requiring proportionally higher FAME production, thereby reducing the cost burden while maintaining high biofuel concentration benefits.
3Ease of manufacture
If ethanol is used as biofuel in gasoline, then production cost is reduced compared to FAMEs, but greenhouse gas emission reduction is lower
Solution Approach 1:
The patent makes C4 to C8 dialkyl ethers universally applicable across both gasoline and diesel fuel systems. These ethers can be blended with ethanol in gasoline to enhance its performance and greenhouse gas reduction properties, while simultaneously serving as protective agents when FAMEs are present in diesel. This multi-functionality allows cost-effective ethanol use to achieve higher emission reduction targets.
Data Source
AI summary
A compression ignition (CI) (typically diesel) fuel formulation is provided containing (i) a C4 to C8 dialkyl ether (DAE), (ii) a naphtha fuel component and (iii) a low boiling component selected from low boiling hydrocarbons, ethers and mixtures thereof. The formulation may be produced along with a gasoline fuel formulation, by (1) preparing a gasoline fuel formulation in a manner which yields a naphtha fuel component as a byproduct, and (2) blending at least some of the naphtha byproduct with a C4 to C8 DAE and a low boiling component (iii) so as to produce the CI fuel formulation.