Superoleophobic Membrane for Low-Energy Fuel Refining
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Solution Overview
Problem
Conventional fuel refining processes are energy-intensive and inefficient, particularly in removing miscible impurities from fuel streams, as they often require large-scale chemical processing equipment and high-energy techniques like distillation, which are not suitable for mobile or emergency scenarios and do not effectively preserve aromatic content necessary for engine compatibility.
Innovation Solution
The use of superoleophobic and hygroscopic membrane filters to facilitate low-energy liquid-liquid extraction by creating surfactant-stabilized emulsions and separating components through gravity-driven processes, allowing for efficient removal of impurities such as sulfur and aromatic compounds without the need for distillation, enabling the production of refined fuels with ultra-low sulfur content and improved purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional distillation or large-scale chemical processing equipment is used to remove impurities from fuel streams, then separation effectiveness is improved, but energy consumption increases significantly
Solution Approach 1:
The patent extracts impurities (sulfur compounds, aromatics, nitrogen-containing compounds) from fuel streams using selective extraction with solvents or adsorbents, replacing energy-intensive distillation processes. This allows separation at lower temperatures while achieving comparable or better purification effectiveness.
Solution Approach 2:
The patent changes the separation mechanism from thermal-based (distillation) to chemical-based (extraction and adsorption). By using selective solvents and adsorbent materials with specific affinities for impurities, the process achieves effective separation without the high energy input required for vaporization and condensation cycles.
2Manufacturing precision
If large-scale chemical processing equipment is used for fuel refining, then separation effectiveness is improved, but device complexity and equipment size increase
Solution Approach 1:
The patent employs porous adsorbent materials and packed beds with high surface area to volume ratios, enabling effective impurity removal in compact configurations. The porous structure provides extensive contact area for mass transfer without requiring large equipment volumes.
Solution Approach 2:
The patent uses thin film extractors and membrane-based separation systems that provide large interfacial areas in compact forms. These thin film structures enable efficient mass transfer while minimizing equipment size and complexity compared to conventional large-scale distillation columns.
3Productivity
If conventional extraction methods with moving internals or packed columns are used to maximize interfacial area, then mass transfer efficiency is improved, but energy consumption and device complexity increase
Solution Approach 1:
The patent uses porous packed beds and high-surface-area adsorbents that provide extensive interfacial area for mass transfer without requiring mechanical movement or high-pressure pumping. The porous structure naturally creates large contact areas between phases, achieving high mass transfer efficiency with minimal energy input.
Solution Approach 2:
The patent employs gravity-driven flow and pressure differential-based circulation instead of energy-intensive mechanical mixing or pumping. By optimizing fluid dynamics through proper column design and phase flow arrangements, the system achieves efficient mass transfer using natural convection and pressure gradients rather than external energy input.
4Manufacturing precision
If conventional extraction methods are used to remove sulfur and aromatic compounds, then impurity removal is improved, but aromatic content necessary for engine compatibility is lost
Solution Approach 1:
The patent uses selective extraction with solvents that have specific affinity for sulfur compounds, aromatics, or nitrogen-containing impurities. By carefully selecting extractants and controlling extraction conditions, the process can selectively remove impurities while preserving the aromatic hydrocarbons necessary for engine seal compatibility and performance.
Solution Approach 2:
The patent employs different adsorbent materials or extractants with specific selectivities for different impurity types. By using materials with tailored chemical properties (such as metal-organic frameworks, zeolites, or selectively tuned solvents), the process achieves selective removal of harmful impurities while leaving desirable aromatic components intact.
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
This method achieves high-purity fuel refining with reduced energy consumption, effectively separating miscible components to a purity of a few parts per million, enabling the production of ultra-low sulfur fuels and biofuels without the need for large-scale equipment or external energy sources, making it suitable for mobile and emergency applications.
Implementation Method 1
superoleophobic and hygroscopic membrane filters to facilitate low-energy liquid-liquid extraction
Implementation Method 2
superoleophobic and hygroscopic membrane filters to facilitate low-energy liquid-liquid extraction
Implementation Method 3
The use of superoleophobic and hygroscopic membrane filters to facilitate low-energy liquid-liquid extraction by creating surfactant-stabilized emulsions
Implementation Method 4
creating surfactant-stabilized emulsions and separating components through gravity-driven processes
Implementation Method 5
creating surfactant-stabilized emulsions and separating components through gravity-driven processes
Implementation Method 6
separating components through gravity-driven processes, allowing for efficient removal of impurities such as sulfur and aromatic compounds
Data Source
AI summary
In various aspects, methods and apparatuses for liquid-liquid extraction are provided. In certain aspects, an emulsion can be formed by combining a feed stream, an extractant, and a surfactant. The feed stream comprises a plurality of distinct components including a first component to be removed therefrom. The feed stream may be selected from a group consisting of: a hydrocarbon feed stream and an azeotrope. Then, a portion of the first component is extracted from the feed stream (or emulsion) by contact with a superoleophobic and hygroscopic membrane filter that facilitates passage of the first component and extractant through the superoleophobic and hygroscopic membrane filter. A purified product is collected having the portion of the first component removed. Such methods are particularly useful for refining fuels and oils and separating azeotropes and other miscible component systems. Energy-efficient, continuous single unit operation apparatuses for conducting such separation techniques are also provided.