Hydrodeoxygenation Catalyst for Acyclic Chemicals
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Solution Overview
Problem
Current methods for processing carbohydrates and carbohydrate derivatives to produce larger, high-value chemicals are limited, particularly in generating acyclic compounds from lignocellulosic biomass, which is challenging due to the complexity of functional groups involved.
Innovation Solution
A process involving a catalyst formed from a support impregnated with transition metals, such as Re, Os, Ir, Pt, Au, Rh, Pd, and Cu, is used to react precursors like carbohydrates or their derivatives with hydrogen gas, allowing for the production of compounds like 1,2-dideoxypentitol and 1,2,5-pentanetriol from lignocellulose-containing materials, employing reactor designs like batch or plug flow reactors and purification techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional reforming methods are used to process polysaccharides, then carbohydrate oligomers and monomers can be obtained, but the process is limited in generating larger, acyclic high-value chemicals
Solution Approach 1:
The patent employs hydrodeoxygenation reactions that change the chemical parameters of carbohydrate precursors by removing oxygen atoms and adding hydrogen, transforming polyolic compounds into acyclic high-value chemicals with different functional group compositions and molecular structures
Solution Approach 2:
The patent uses composite catalyst systems comprising multiple transition metals (such as Ru, Rh, Pd, Pt, Ir, Os, Cu, Ni, Co) supported on metal oxides or other supports, where the synergistic interaction between different metals enables selective production of various acyclic chemicals from carbohydrate precursors
2Ease of manufacture
If carbohydrates are processed due to their many functional groups, then low carbon solvents can be produced, but processes for generating larger, acyclic high value chemicals are lacking
Solution Approach 1:
The patent applies selective hydrodeoxygenation at specific functional groups within carbohydrate molecules, using catalysts with tailored properties to target particular oxygen-containing groups (such as hydroxyl, carbonyl, or carboxyl groups) for conversion while preserving other functional groups, enabling selective production of desired acyclic chemicals
Solution Approach 2:
The patent uses polyolic compounds as intermediate species that serve as bridging materials between conventional carbohydrate processing and the target acyclic high-value chemicals, where these intermediates contain reduced oxygen content and serve as precursors for further transformation into acyclic products
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
This method effectively increases the conversion and selectivity of precursors to valuable compounds, demonstrating improved efficiency in producing high-value chemicals from lignocellulosic biomass under various reaction conditions, including pressure and temperature variations.
Implementation Method 1
reacting a precursor, the precursor containing more oxygen (O) atoms than the compound, with a gas containing hydrogen (H2) in the presence of a catalyst
Implementation Method 2
reacting a precursor, the precursor containing more oxygen (O) atoms than the compound, with a gas containing hydrogen (H2) in the presence of a catalyst
Data Source
AI summary
This disclosure provides embodiments directed to compositions, methods, and processes to produce compounds having the structure:each of R1-R5 is selected from a hydroxyl group and hydrogen; and R1-R5 include at least one hydroxyl group and at least one hydrogen; and n=0-2. In particular, methods of the disclosure can include reacting a precursor, the precursor containing more oxygen (O) atoms than the compound, with a gas containing hydrogen (H2) in the presence of a catalyst.