Bisabolene Fuel Conversion for Navy Range
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Solution Overview
Problem
Current fuel technologies for Navy platforms rely on nonsustainable petroleum sources, leading to high carbon emissions and limited range and loiter time for aircraft and weapon systems.
Innovation Solution
Conversion of sesquiterpenes, specifically alpha-bisabolene, into high-density fuels through fermentation, catalytic isomerization, and hydrogenation, which can be blended with other fuels to achieve higher net heat of combustion and cetane numbers, reducing carbon footprint and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional petroleum-based fuels are used, then current fuel technologies are available, but carbon emissions are high and range/loiter time are limited
Solution Approach 1:
The patent changes the chemical composition parameters of the fuel by converting sesquiterpenes through catalytic isomerization and hydrogenation to produce hydrocarbons with specific molecular structures (C10-C16 range) that achieve superior energy density and combustion properties, thereby reducing carbon emissions while extending range and loiter time
Solution Approach 2:
The patent replaces petroleum-based fuel production with a biological conversion process using sesquiterpenes from renewable sources, substituting the mechanical extraction and refining of petroleum with biochemical fermentation and catalytic conversion processes that produce cleaner-burning fuels
2Use of energy by moving object
If sesquiterpenes are converted through fermentation, catalytic isomerization, and hydrogenation, then high-density fuels with higher net heat of combustion are produced, but the conversion process complexity increases
Solution Approach 1:
The patent segments the fuel conversion process into three distinct stages: (1) fermentation of sesquiterpenes to produce precursor compounds, (2) catalytic isomerization to rearrange molecular structures, and (3) hydrogenation to saturate bonds and form final hydrocarbon products. This segmentation allows each process to be optimized independently while maintaining overall efficiency
Solution Approach 2:
The patent uses catalysts as intermediaries in the conversion process, where catalytic agents facilitate the isomerization and hydrogenation reactions without being consumed, enabling the transformation of sesquiterpenes into high-energy hydrocarbons with controlled complexity
3Reliability
If fuels are blended to achieve higher cetane numbers, then combustion performance improves, but the fuel formulation complexity increases
Solution Approach 1:
The patent creates composite fuel formulations by blending converted sesquiterpene hydrocarbons with other fuel components in specific ratios to achieve target cetane numbers and combustion characteristics, combining the advantages of different hydrocarbon structures to optimize performance
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 resulting fuels offer increased range and loiter time for Navy platforms while decreasing reliance on petroleum and lowering carbon emissions, with properties comparable to or exceeding those of JP-10 and JP-5 fuels.
Implementation Method 1
Fuels derived from bisabolene can have volumetric net heats of combustion comparable to JP-10 and can be produced from biomass sugars
Implementation Method 2
bisabolene has three alkene groups which can be catalytically isomerized to generate fuels with net heats of combustion higher than JP-10
Implementation Method 3
The product mixture is hydrogenated to yield a saturated mixture
Data Source
AI summary
A process for making high density fuels having the potential to increase the range and/or loiter time of Navy platforms. Derivation of these fuels from a sustainable source will decrease the carbon footprint of the Department of Defense (DoD) and reduce reliance on nonsustainable petroleum sources. Fuels derived from bisabolene can have volumetric net heats of combustion comparable to JP-10 and can be produced from biomass sugars.