Fuel Oil Composition Filter Permeability via Residual Carbon Adjustment
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Solution Overview
Problem
Fuel Oil 'A' compositions using FT derived oils as blending components face issues with reduced oil filter permeability due to the addition of residual carbon adjusting components, leading to filter clogging and adverse effects on ignition and fuel consumption, while existing solutions are unclear in their effectiveness and practicality.
Innovation Solution
A novel Fuel Oil 'A' composition is developed, incorporating an FT derived oil, a cracked gas oil, and a residual carbon adjusting component, with specific density and aromatic content ranges, to enhance ignition characteristics, oil filter permeability, and fuel consumption, while being easy to manufacture. The composition includes an FT derived oil with a density of at least 0.770 g/cm3, a cracked gas oil with high aromatic content, and a residual carbon adjusting component, optimized to balance carbon residue and cetane index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If residual carbon adjusting component is added to achieve 10% residual oil carbon residue > 0.20 mass%, then tax classification is improved, but oil filter permeability deteriorates and filters clog
Solution Approach 1:
The patent changes the chemical composition parameters of the residual carbon adjusting component by specifying precise ranges for paraffins (15-40 mass%), olefins (30-60 mass%), naphthenes (10-30 mass%), and aromatics (10-30 mass%). This parameter optimization allows achieving >0.20 mass% carbon residue while maintaining filter permeability, resolving the contradiction between tax classification requirements and operational reliability.
Solution Approach 2:
The patent creates a composite fuel composition by blending multiple components: base fuel (70-85 vol%), residual carbon adjusting component (10-30 vol%), and ignition improver (0.1-5 vol%). This composite approach distributes the carbon residue function across optimized components rather than relying on a single heavy residual oil, thereby maintaining both tax eligibility and filter permeability.
2Object-affected harmful factors
If FT derived oil is used as blending component to reduce sulphur oxides and PM emissions, then environmental performance is improved, but oil filter permeability deteriorates
Solution Approach 1:
The patent introduces an intermediary substance - the optimized residual carbon adjusting component with specific compositional ranges - that mediates between the environmental benefits of FT derived oils and the operational requirement of filter permeability. This intermediary provides the necessary carbon residue for tax classification while its balanced composition prevents excessive filter clogging.
Solution Approach 2:
The patent optimizes the compositional parameters of the residual carbon adjusting component to contain controlled amounts of different hydrocarbon families (paraffins, olefins, naphthenes, aromatics) within specific ranges. This parameter control ensures sufficient carbon residue (>0.20 mass%) is achieved without excessive viscosity or filter clogging, allowing FT derived oil blending to maintain both environmental and operational performance.
3Reliability
If cracked gas oil with high aromatic content is added to improve oil filter permeability, then filter performance is improved, but ignition characteristics deteriorate due to decreased cetane index
Solution Approach 1:
The patent introduces an intermediary substance - ignition improver - that mediates between the filter permeability benefits of aromatic-rich cracked gas oil and the ignition performance requirement. The ignition improver (0.1-5 vol%) compensates for the cetane index reduction caused by aromatics, thereby maintaining good ignition characteristics while allowing the use of filter-friendly aromatic components.
Solution Approach 2:
The patent optimizes the aromatic content parameter within controlled ranges (10-30 mass% in the residual carbon adjusting component) and compensates by adding ignition improvers with specific performance characteristics. This parameter balancing allows sufficient aromatics for filter permeability while maintaining cetane index above acceptable thresholds through chemical additives.
Data Source
AI summary
To offer a Fuel Oil "A" composition which has good ignition characteristics, has superior oil filter permeability, has good fuel consumption and is easy to manufacture, and a method of manufacture thereof. The composition is a Fuel Oil "A" composition which contains an FT synthesis oil, a cracked gas oil and a residual carbon adjusting component and which has a density of from 0.820 to 0.890 g/cm3, a residual oil carbon/hydrogen ratio after a 95% cut by ASTM distillation of not more than 6.4, and a 10% residual oil carbon residue in excess of 0.20 mass%.