Biomass Conversion to Jet Fuel via Catalytic Deoxygenation
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Solution Overview
Problem
Current methods for producing biofuels from biomass, such as biodiesel, result in fuels with lower energy density and poor cold-flow properties, making them unsuitable for high-performance applications like jet engine fuels, and lack affordable and sustainable feedstock solutions.
Innovation Solution
A process involving thermal hydrolysis of lipidic biomass to produce free fatty acids, followed by catalytic deoxygenation to form n-alkanes, and subsequent reforming to create a mixture of hydrocarbon compounds suitable for jet, diesel, or gasoline engine fuels, utilizing by-products like glycerol for process heating and recycling solvents to enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If biodiesel is produced through transesterification of triglycerides, then biofuel can be produced from biomass, but the energy density and cold-flow properties deteriorate compared to petroleum-derived fuels
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of fatty acid chains through controlled cracking reactions. The process converts long-chain triglycerides into shorter-chain hydrocarbons with optimized carbon numbers (C8-C12 for gasoline, C10-C20 for diesel), thereby improving energy density and cold-flow properties while maintaining manufacturability from biomass feedstock
Solution Approach 2:
The patent segments the long-chain triglyceride molecules into smaller hydrocarbon units through catalytic cracking. This segmentation breaks down the complex biomass structure into manageable fuel components that match petroleum fuel specifications, resolving the contradiction between biomass-derived production and fuel performance requirements
2Adaptability or versatility
If conventional biofuel production methods are used, then alternative fuel source is provided, but the fuel supply stability and price stability deteriorate due to limited feedstock availability
Solution Approach 1:
The patent applies universality by designing a flexible catalytic cracking process that can handle multiple types of lipidic biomass feedstocks including vegetable oils, animal fats, and algae oils. This multi-functionality enables stable fuel production from diverse feedstock sources, ensuring supply stability while providing versatile alternative fuel options
Solution Approach 2:
The patent introduces catalytic cracking as an intermediary process between biomass feedstock and final fuel product. This intermediary step standardizes the conversion process regardless of feedstock variability, acting as a mediator that ensures consistent fuel output and supply stability from diverse biomass sources
3Quantity of substance
If thermal depolymerization is used for waste material conversion, then methane and similar compounds can be extracted, but the process complexity and energy consumption increase
Solution Approach 1:
The patent extracts the essential fuel-producing function from complex thermal depolymerization processes by implementing a targeted catalytic cracking approach. This extraction focuses specifically on breaking down triglyceride molecules into desired hydrocarbon ranges, simplifying the overall process while maintaining effective fuel compound production from biomass
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 process achieves biofuels with energy density and cold-flow properties matching petroleum-derived fuels, offering an affordable and sustainable solution for high-performance biofuels with improved energy efficiency and scalability.
Implementation Method 1
performing thermal hydrolysis on a lipidic biomass to form a product stream comprising a free fatty acid and form a by-product stream comprising glycerol
Implementation Method 2
performing catalytic deoxygenation on the free fatty acid stream to form a product stream comprising an n-alkane
Implementation Method 3
performing one or more reforming steps on the n-alkane stream to form a product stream comprising a mixture of hydrocarbon compounds
Implementation Method 4
utilizing by-products like glycerol for process heating
Data Source
AI summary
A process for the direct conversion of lipid biomass fuel stock to combustible fuels include the steps of hydrolyzing a lipid biomass to form free fatty acids, catalytically deoxygenating the free fatty acids to from n-alkanes, and reforming at least a portion of the n-alkanes into a mixture of compounds having the correct chain length, conformations and ratio to be useful as transportation fuels. The process exhibits an overall energy efficiency of at least about 75%, wherein energy efficiency is calculated as the lower heating value of the produced transportation fuel over the sum of the lower heating value of the process reactants and the total energy input into the process.