Biofuel Lubricity via Partial Hydrodeoxygenation
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Solution Overview
Problem
Biologically-derived distillate fuels, such as those from triglycerides, face challenges with high viscosity and poor lubricity, making them unsuitable for various applications, including jet fuel, and require expensive conventional lubricity additives, which is environmentally and economically undesirable.
Innovation Solution
A method involving partial hydrodeoxygenation of triglycerides to retain residual oxygenates, followed by catalytic isomerization to produce biofuels with greater than 90% paraffins and 50% isoparaffins, ensuring improved lubricity and compliance with transportation fuel specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If triglycerides are directly used as biofuel, then the fuel is highly oxygenated and different from conventional fuels, but the fuel has high viscosity and cannot be used as jet fuel
Solution Approach 1:
The patent applies partial hydrodeoxygenation to change the chemical composition parameters of triglycerides, converting them into hydrocarbons with reduced viscosity while retaining sufficient oxygenates (0.001-1.0 wt%) to maintain lubricity. This parameter transformation enables the fuel to meet jet fuel specifications without requiring complete deoxygenation.
Solution Approach 2:
Instead of complete hydrodeoxygenation that would eliminate all oxygenates, the patent employs partial hydrodeoxygenation to retain a controlled amount of oxygenates (0.001-1.0 wt%). This partial action provides sufficient lubricity improvement while avoiding the need for expensive conventional lubricity additives.
2Adaptability or versatility
If complete hydrodeoxygenation is performed to convert oxygenates into paraffins, then the fuel becomes similar to conventional fuels, but the fuel has poor lubricity properties
Solution Approach 1:
The patent performs partial rather than complete hydrodeoxygenation, retaining 0.001-1.0 wt% oxygenates in the final fuel product. This partial deoxygenation maintains sufficient lubricity while achieving >90 wt% paraffinic content for compatibility with conventional fuel systems.
Solution Approach 2:
The patent precisely controls the oxygenate content parameter within the range of 0.001-1.0 wt% after partial hydrodeoxygenation. This parameter optimization achieves the balance between lubricity (requiring some oxygenates) and fuel compatibility (requiring high paraffinic content).
3Object-generated harmful factors
If conventional lubricity additives are added to improve lubricity, then the lubricity is improved, but the cost increases and environmental benefits are reduced
Solution Approach 1:
The patent enables the biofuel to self-provide lubricity through retained oxygenates (0.001-1.0 wt%) from partial hydrodeoxygenation of triglycerides. This self-service approach eliminates or reduces the need for expensive conventional lubricity additives, lowering production costs and maintaining environmental benefits.
Solution Approach 2:
The retained oxygenates act as an intermediary substance that provides lubricity function within the fuel system. Instead of adding separate lubricity additives, the oxygenates naturally present in partially hydrodeoxygenated triglycerides serve as the lubricity-providing component.
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 method efficiently produces biofuels with enhanced lubricity and energy content, reducing the need for external additives and expanding their application range, while maintaining environmental benefits by utilizing biological resources.
Implementation Method 1
partially-hydrodeoxygenating triglycerides in the biofuel precursor material to yield a biofuel intermediate comprising linear hydrocarbon species and residual oxygenates
Implementation Method 2
catalytically-isomerizing the biofuel intermediate using an isomerization catalyst to yield a biofuel comprising isoparaffins
Data Source
AI summary
The present invention is generally directed to methods for making fuels from biomass comprising triglyceride species, whereby the biomass is subjected to partial hydrodeoxygenation and (optionally) catalytic isomerization. The partial-hydrodeoxygenation of the triglyceride species produces a fuel that retains some oxygenates for enhanced lubricity.