Fuel Emulsion Surfactant Package for Diesel Engine Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fuel emulsions for diesel engines face challenges in stability, foaming, filterability, and corrosion protection, especially at varying water concentrations, temperatures, and pressures, requiring an effective and cost-efficient emulsifier package that is easy to prepare and store.
Innovation Solution
A method of preparing a fuel emulsion using a combination of short-chained and long-chained surfactants, specifically of formulas (I) and (II), which are carbon, hydrogen, nitrogen, and oxygen-based, to create a stable, low-foaming, and corrosion-resistant emulsion suitable for diesel engines, even with low shear forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional emulsifiers are used to stabilize fuel emulsions at high water concentrations, then emulsion stability is improved, but foaming increases and filterability deteriorates
Solution Approach 1:
The patent employs a composite emulsifier system combining short-chained surfactant (formula I) and long-chained surfactant (formula II) in specific weight ratios (1:4 to 4:1). This composite approach leverages the complementary properties of both surfactants: the short-chained component provides rapid emulsification and low foaming, while the long-chained component ensures stability at high water concentrations and temperatures, thereby resolving the contradiction between stability and foaming control.
Solution Approach 2:
The patent optimizes specific parameters including the weight ratio of short-chained to long-chained surfactant (1:4 to 4:1), the ethylene oxide additive number (m: 1-100), and the hydrophobic chain length (C6-14 for short-chained, C16-32 for long-chained). These parameter adjustments enable the emulsifier package to achieve both low foaming and high stability by tuning the molecular structure and composition to balance emulsification kinetics and thermodynamic stability.
2Stability of the object's composition
If strong shear forces are applied during emulsification to improve mixing, then emulsion homogeneity is improved, but energy consumption and equipment complexity increase
Solution Approach 1:
The emulsifier package exhibits self-emulsifying properties due to the synergistic interaction between short-chained and long-chained surfactants. The short-chained surfactant rapidly reduces interfacial tension upon contact with fuel and water, enabling spontaneous emulsification without requiring high-shear mixing equipment. This self-service mechanism achieves homogeneous emulsion formation with minimal energy input and simple mixing devices.
Solution Approach 2:
The surfactants are pre-positioned at the interface between fuel and water phases, where they immediately begin reducing interfacial tension and forming stable droplets. This preliminary action at the interface eliminates the need for prolonged high-shear mixing to achieve homogeneity, as the emulsification process initiates automatically upon phase contact.
3Object-affected harmful factors
If existing emulsifier packages are used to prevent corrosion, then corrosion protection is improved, but cost and complexity of the emulsifier package increase
Solution Approach 1:
The patent specifies precise compositional parameters for the emulsifier package: short-chained surfactant with C6-14 hydrophobic chain and ethylene oxide additive number m=1-100, long-chained surfactant with C16-32 hydrophobic chain and ethylene oxide additive number n=1-30, and weight ratio of 1:4 to 4:1. These controlled parameters ensure adequate corrosion protection through stable emulsion formation without requiring additional corrosion inhibitor additives, thereby maintaining simplicity.
4Adaptability or versatility
If multiple types of emulsifiers are combined to stabilize emulsion under various conditions, then adaptability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent merges the functions of multiple emulsifiers into a unified two-component system consisting of short-chained surfactant (formula I) and long-chained surfactant (formula II). This combination provides broad adaptability across different water concentrations (10-90 wt%), temperatures, and pressures while maintaining ease of manufacture through simple mixing of two commercial-grade surfactants without requiring multi-step synthesis or purification processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The emulsifier package stabilizes fuel emulsions at high water concentrations and various conditions, improving filterability and reducing precipitation, while being cost-effective and easy to prepare, thus enhancing diesel engine performance and efficiency.
Implementation Method 1
an emulsifier package which comprises a short-chained surfactant of the formula (I) and optionally a long-chained surfactant of the formula (II)
Implementation Method 2
preparing the fuel emulsion by emulsifying a fuel and water in the presence of an emulsifier package
Data Source
AI summary
A method for powering a diesel engine with a fuel emulsion involves preparing the fuel emulsion by emulsifying a fuel and water in the presence of an emulsifier package, which contains a short-chained surfactant of the formula (I) as defined below and optionally, a long-chained surfactant of the formula (II) as defined below. A fuel emulsion for powering a diesel engine is also provided.