Metal Oxide Catalyst Selection for Lipid Feedstock Fuel Yield
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Solution Overview
Problem
Existing reactor systems and processes for processing renewable lipid feedstocks produce intermediate products with a wide boiling range, including components that are less valuable for renewable transportation fuels, necessitating improved methods to increase the yield of fuels boiling in the 40° C. to 300° C. range.
Innovation Solution
A reactor system using catalyst particles with a diameter of 0.01 to 0.5 mm, comprising a metal oxide on an oxide support, treats lipid feedstocks to produce a treated stream that is fractionated into a gaseous and liquid fraction, with the liquid fraction containing bio-oil having a lower oxygen and impurity content, thereby enhancing the yield of transportation fuels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing reactor systems and processes are used to process renewable lipid feedstocks, then the processing can be performed, but the product contains components over a wide boiling range with reduced yield of transportation fuels in the 40°C to 300°C range
Solution Approach 1:
The patent applies parameter changes by optimizing catalyst properties including particle size (0.01 to 0.5 mm), metal oxide composition, and support material to shift the product distribution toward the desired transportation fuel boiling range. By changing catalyst parameters, the reaction pathways are modified to produce more components in the 40°C to 300°C range while reducing unwanted high-boiling components.
Solution Approach 2:
The patent uses composite catalyst materials consisting of metal oxides supported on specific carrier materials. This composite structure provides synergistic effects that enhance the catalyst's ability to produce transportation fuel-range hydrocarbons while minimizing the formation of unwanted byproducts outside the target boiling range.
2Reliability
If lipid feedstock is processed to produce bio-oil, then the liquid fraction is obtained, but the bio-oil contains oxygen and impurities that reduce its quality for fuel applications
Solution Approach 1:
The patent employs extraction principles by using the catalyst system to selectively remove oxygen and impurities from the bio-oil during the processing stage. The catalyst promotes reactions that eliminate oxygen-containing compounds and separate impurities, thereby extracting the harmful components and producing higher quality fuel-grade bio-oil.
Solution Approach 2:
The patent changes process parameters including temperature, pressure, and catalyst composition to optimize the removal of oxygen and impurities. By adjusting these parameters, the reaction conditions favor the formation of deoxygenated hydrocarbons while minimizing the presence of unwanted impurities in the final bio-oil product.
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 and system significantly improve the yield of transportation fuels by producing a bio-oil with reduced oxygen and impurities, suitable for refining into renewable aviation fuel, diesel fuel, and gasoline.
Implementation Method 1
catalyst particles comprise a metal oxide on an oxide support and promote combined ketonization and pyrolysis of the lipid feedstock
Implementation Method 2
catalyst particles comprise a metal oxide on an oxide support and promote combined ketonization and pyrolysis of the lipid feedstock
Implementation Method 3
fractionating the treated stream to obtain a gaseous fraction and a liquid fraction
Data Source
AI summary
A reactor system includes a reactor that treats a lipid feedstock using a metal oxide catalyst to produce a treated stream comprising a bio-oil. The metal oxide catalyst includes catalyst particles having a diameter of 0.01 to 0.5 mm. The metal oxide catalyst can comprise calcium on alumina. The bio-oil has an increased proportion of transportation fuels relative to other techniques for processing lipid feedstocks.