Renewable Marine Fuel Composition With Partial Hydrodeoxygenation
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Solution Overview
Problem
The transition to renewable marine fuels from petroleum-based fuels is hindered by the need to meet stringent ISO-F-RMK-700 specifications, which are costly and inefficient, particularly due to the presence of oxygen in renewable fuels reducing energy content and posing corrosion risks, while existing methods fail to distinguish between corrosive and non-corrosive acids.
Innovation Solution
A novel marine fuel composition with relaxed specifications, allowing for partial hydrotreatment to minimize oxygen and halogen content, ensuring a balance between cost and efficiency, while maintaining fuel quality and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If full hydrotreatment is applied to remove oxygen from renewable marine fuel, then fuel stability and energy content are improved, but production cost and hydrogen consumption increase significantly
Solution Approach 1:
The patent applies partial hydrotreatment instead of complete oxygen removal. The fuel is treated to reduce oxygen content to a level sufficient for stability and corrosion prevention, while leaving some oxygen content (1-10 wt%) to avoid excessive hydrogen consumption and production costs. This partial action resolves the contradiction by achieving adequate energy content without full upgrading costs.
Solution Approach 2:
The patent changes the oxygen content parameter from near-zero (full upgrading) to a controlled range of 1-10 wt%. This parameter adjustment allows the fuel to maintain adequate stability and energy content while significantly reducing hydrogen consumption and production cost, resolving the contradiction between energy content and manufacturing ease.
2Reliability
If strict ISO-F-RMK-700 specifications are enforced for renewable marine fuel, then fuel quality and engine compatibility are improved, but production cost and equipment size increase
Solution Approach 1:
The patent applies local quality by targeting specific problematic components (corrosive acids, excessive water, halogens) for removal while maintaining tolerance for other parameters. Instead of uniform strict treatment across all specifications, the fuel is treated locally to address only the critical corrosion and stability issues, reducing production cost while maintaining adequate engine compatibility.
Solution Approach 2:
The patent applies partial upgrading action to meet the essential requirements for engine compatibility without enforcing all strict ISO specifications. By removing only the necessary contaminants (corrosive acids, water, halogens) to adequate levels, the fuel achieves sufficient reliability for engine operation while avoiding the excessive production costs of complete specification compliance.
3Stability of the object's composition
If complete hydrodeoxygenation is performed to remove all oxygen, then fuel stability is improved, but hydrogen consumption and production cost increase
Solution Approach 1:
The patent applies partial hydrodeoxygenation to remove oxygen to a sufficient level (reducing to 1-10 wt%) rather than complete removal. This partial action achieves adequate fuel stability to prevent degradation and corrosion while significantly reducing hydrogen consumption compared to complete hydrodeoxygenation, resolving the contradiction between stability and hydrogen quantity required.
Solution Approach 2:
The patent accepts a certain level of oxygen content (1-10 wt%) that would be considered insufficient by traditional standards, treating this residual oxygen as acceptable rather than requiring its complete removal. This approach reduces hydrogen consumption and production cost while maintaining sufficient stability for the fuel's operational lifetime, effectively treating the fuel as a disposable product with adequate rather than perfect stability.
4Object-affected harmful factors
If total acidity number is reduced below 2.5 mg KOH/g, then corrosion resistance is improved, but production cost and equipment size increase
Solution Approach 1:
The patent applies local quality by targeting the removal of corrosive components (acids, water, halogens) to adequate levels rather than requiring complete elimination of all oxygenates. The total acidity number is reduced to a level sufficient for corrosion prevention while maintaining a simpler, smaller production setup compared to facilities designed for complete specification compliance, resolving the contradiction between corrosion resistance and device complexity.
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 novel fuel composition achieves cost-effective production with reduced hydrogen consumption and equipment size, maintaining engine operation quality by minimizing corrosion and energy loss, thus offering a flexible and environmentally friendly alternative to traditional marine fuels.
Implementation Method 1
A liquid hydrocarbonaceous feedstock comprising at least 5 wt % oxygen in oxygenates is contacted with a hydrotreatment catalyst
Implementation Method 2
contacted with a hydrotreatment catalyst under conditions affecting conversion of at least 10% but no more than 90% of the oxygen in oxygenates to water and carbon dioxide
Data Source
AI summary
The present invention relates to a composition comprising, on water free basis, at least 80 wt % molecules comprising from 8 to 35 C-atoms, said composition having a flash point above 60° C. and comprising, on water free basis, 9.5-12 wt % H, 3-45 wt % O and less than 5 wt ppm halogens, the use of such a composition as a marine fuel and a process for producing such a composition by partial hydrodeoxygenation.