Co-processing Pyrolysis Oil and Triglycerides for Fuel
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Solution Overview
Problem
Current methods for producing fuels from renewable feedstocks, such as biomass-derived pyrolysis oil and triglycerides, face challenges in achieving the desired fuel specifications for gasoline, diesel, and aviation fuels, particularly in terms of cold flow properties and molecular weight distribution.
Innovation Solution
A process that co-processes biomass-derived pyrolysis oil and triglycerides through hydrogenation, deoxygenation, hydroisomerization, and hydrocracking to produce a fuel with both paraffin-rich and cyclic-rich components, allowing for the generation of fuels in the gasoline, diesel, and aviation boiling point ranges, while optimizing cold flow properties and molecular weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If single renewable feedstock is processed, then production process is simple, but fuel specifications cannot be met
Solution Approach 1:
The patent combines two different renewable feedstocks (pyrolysis oil and triglyceride-containing feedstock) into a single co-processing system. The mixed feedstock is simultaneously subjected to hydrogenation, deoxygenation, hydroisomerization, and hydrocracking to produce fuel meeting specifications that neither feedstock could achieve alone.
Solution Approach 2:
The invention creates a composite fuel product by co-processing two different feedstocks with complementary properties. The pyrolysis oil provides aromatic and cyclic components while the triglyceride feedstock provides paraffinic components, resulting in a blended fuel composition that meets all specifications.
2Reliability
If pyrolysis oil is used alone, then cyclic rich component is produced, but cold flow properties are poor
Solution Approach 1:
The patent creates different compositional zones within the final fuel product. The co-processed fuel contains both cyclic-rich aromatic components (from pyrolysis oil) and paraffin-rich components (from triglyceride feedstock), with each component contributing specific properties. The paraffinic portion improves cold flow while the aromatic portion provides stability.
3Adaptability or versatility
If triglycerides are processed alone, then paraffin rich component is produced, but fuel diversity is limited
Solution Approach 1:
The co-processing system produces a multi-component fuel product that can serve multiple applications. The process generates paraffin-rich, aromatic-rich, and cyclic-rich components that can be blended in various proportions to create gasoline, diesel, or aviation fuel formulations, making the system universally applicable to different fuel markets.
4Manufacturing precision
If multiple processing steps are applied, then fuel quality is improved, but process complexity increases
Solution Approach 1:
The patent divides the conversion process into four distinct functional zones: hydrogenation zone, deoxygenation zone, hydroisomerization zone, and hydrocracking zone. Each zone performs a specific transformation on the co-fed feedstocks, allowing precise control over the final fuel composition through sequential processing steps.
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 effectively produces fuels that meet specific fuel specifications, including improved cold flow properties and suitable molecular weight ranges, enabling the use of entirely renewable feedstocks without requiring engine upgrades, and allows for blending with petroleum-derived fuels.
Implementation Method 1
The two renewable feedstocks are co-processed through the zones of the process to hydrogenate and deoxygenate the mixed feedstock to provide an effluent comprising n-paraffins and cyclic hydrocarbons
Implementation Method 2
Both of these compounds contain aliphatic carbon chains having from about 8 to about 24 carbon atoms. The aliphatic carbon chains in the triglycerides or FFAs can also be mono-, di- or poly-unsaturated.
Implementation Method 3
The effluent comprising at least one paraffin rich component and at least one cyclic rich component form at least one fuel or may be blended with other components to form additional fuels
Implementation Method 4
The fuel, fuel additives, or blending components generated may include those in the gasoline boiling point range, the diesel boiling point range, and or the aviation boiling point range
Data Source
AI summary
A process for producing a fuel or fuel blending component from co-processing at least two different classes of renewable feedstocks, is presented. One feedstock comprises glycerides and free fatty acids in feedstocks such as plant and animal oils while the other feedstock comprises biomass derived pyrolysis oil. The source of the animal or plant oil and the biomass may be the same renewable source.