Alkyl Phenol and Triazole Additives for Fatty Acid Ester Fuel Stability
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Solution Overview
Problem
Fuel compositions containing significant quantities of fatty acid esters face rapid oxidation and degradation issues, leading to storage instability and equipment fouling, which are exacerbated by long storage periods and varying temperatures.
Innovation Solution
Incorporation of a combination of alkyl phenols and triazole derivatives as additives in a fuel composition, with specific mass content ratios, to enhance oxidation stability and storage stability, particularly at low and high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If significant quantities of fatty acid esters (at least 30% by volume) are incorporated into fuel composition to meet environmental requirements, then environmental performance is improved, but oxidation stability deteriorates
Solution Approach 1:
The patent introduces a specific additive combination comprising alkyl phenols (5-200 ppm) and triazole derivatives (2-100 ppm) as intermediary substances that mediate between the renewable fuel base and the environment. These additives act as protective intermediaries that prevent oxidation of the fatty acid esters while allowing the fuel to maintain its low carbon footprint benefits, effectively shielding the fuel from harmful oxidation reactions during storage
Solution Approach 2:
The patent creates a composite fuel system by combining the fatty acid ester base with a synergistic additive package. The composite nature of the fuel composition, with carefully controlled ratios of alkyl phenols and triazole derivatives, provides enhanced oxidation stability that neither component could achieve alone, while maintaining the renewable character of the base fuel
2Adaptability or versatility
If fuel composition is stored for long periods (several weeks to months) before consumption, then distribution and logistics flexibility is improved, but oxidation degradation accelerates
Solution Approach 1:
The patent applies preliminary protective action by incorporating oxidation-inhibiting additives into the fuel composition before storage begins. The alkyl phenols and triazole derivatives are pre-positioned in the fuel to provide continuous protection during extended storage periods, preventing oxidation from occurring in the first place rather than attempting to treat degradation after it occurs
Solution Approach 2:
The additive combination provides continuous protection throughout the entire storage period. The synergistic interaction between alkyl phenols and triazole derivatives ensures ongoing oxidation inhibition from the moment of fuel formulation through months of storage, maintaining composition stability without interruption or additional intervention
3Adaptability or versatility
If temperature varies from -20°C to 40°C during storage, then seasonal adaptability is improved, but oxidation rate increases
Solution Approach 1:
The additive combination serves multiple functions simultaneously: alkyl phenols provide primary oxidation inhibition while triazole derivatives complement this action and may also contribute to cold-flow properties. This multi-functional additive package addresses both oxidation stability and temperature adaptability in a single formulation, making the fuel suitable for seasonal storage conditions without requiring separate formulations for different temperature regimes
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 additive combination significantly improves the oxidation stability and storage stability of fuel compositions, allowing long-term storage without degradation, maintaining fluidity and preventing solid deposits even at low temperatures, ensuring effective pumpability and equipment operation.
Implementation Method 1
the incorporation into the fuel composition of a combination of at least two particular additives makes it possible to solve the above-mentioned problems and to improve the oxidation stability of fuel compositions comprising significant proportions of fatty acid esters
Data Source
AI summary
The present invention relates to a fuel composition comprising: a) at least one hydrocarbon base A; b) at least 30% by volume of at least one base B consisting of one or more esters chosen from methyl esters and ethyl esters of fatty acids; c) at least one first additive A1 chosen from alkyl phenols comprising a phenolic nucleus substituted by several alkyl groups comprising from 1 to 4 carbon atoms in a content ranging from 5 to 200 ppm by mass, and d) at least one second additive A2 chosen from amines substituted by one or more groups comprising a triazole unit in a content ranging from 2 to 100 ppm by mass. The invention also relates to the use of the two additives A1 and A2 to improve the oxidation stability of a fuel composition comprising at least 30% by volume of at least one base consisting of one or more esters chosen from methyl esters and ethyl esters of fatty acids.