Hydrodeoxygenation Catalyst Composition for Selective C-O Cleavage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydrodeoxygenation processes for producing renewable fuels from biological feedstocks suffer from low efficiency and selectivity, particularly in the removal of oxygen without breaking C-C bonds, leading to unwanted by-products like CO and CO2, which reduce yield.
Innovation Solution
A catalyst composition comprising specific amounts of molybdenum, nickel, and phosphorus, applied through impregnation methods, is used to enhance the hydrodeoxygenation process, ensuring high activity and selectivity by maintaining C-O bond cleavage while minimizing C-C bond cleavage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydrodeoxygenation catalysts are used, then oxygen removal is achieved, but C-C bond cleavage occurs producing unwanted CO and CO2, reducing yield
Solution Approach 1:
The patent modifies catalyst composition parameters by incorporating specific amounts of nickel (0.1-1.3 wt%) and phosphorus (0.5-2.9 wt%) with molybdenum (6-16 wt%), creating a bimetallic catalyst system that changes the chemical parameters of the catalyst to achieve high selectivity for C-O bond cleavage while minimizing C-C bond cleavage, thereby reducing yield loss from unwanted CO and CO2 formation
Solution Approach 2:
The patent uses a composite catalyst material combining molybdenum, nickel, and phosphorus on a support structure. This composite approach allows the synergistic interaction of different metal components to achieve the desired selectivity, where the bimetallic system (Mo-Ni) with phosphorus promotion provides both activity and selectivity for hydrodeoxygenation while suppressing unwanted side reactions
2Productivity
If monometallic molybdenum catalyst is used, then hydrodeoxygenation activity is maintained, but selectivity and efficiency are insufficient
Solution Approach 1:
The patent transitions from a monometallic molybdenum catalyst to a bimetallic Mo-Ni catalyst system with phosphorus promotion. This composite material approach maintains the high activity of molybdenum while adding nickel to enhance selectivity for the desired C-O bond cleavage pathway, achieving both productivity and reliability improvements simultaneously
Solution Approach 2:
The patent applies local quality by introducing phosphorus as a promoter at specific concentrations (0.5-2.9 wt%) within the catalyst structure. This localized modification of the catalyst composition creates specific active sites that favor selective C-O bond cleavage while maintaining overall catalyst activity, thereby improving selectivity without sacrificing productivity
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 catalyst achieves high hydrodeoxygenation efficiency, producing desired products with reduced formation of CO and CO2, thereby improving the yield and quality of renewable fuels.
Implementation Method 1
The method employs a specific catalyst to achieve high activity and selectivity
Implementation Method 2
removal of oxygen by catalytic reaction with hydrogen
Data Source
AI summary
The present process effectively produces hydrocarbon products upon hydrotreating a feedstock of biological origin. The process comprises first providing a bio feedstock, then passing the feedstock to a reactor comprising a catalyst comprised of about 6 to 16 wt. % Mo, 0.1 to 1.3 wt. % Ni, and 0.5 to 2.9 wt. % P. The bio feedstock is then reacted over the catalyst.