Heterogeneous Catalyst Complex for CO2 Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current carbon dioxide conversion technologies face challenges in energy efficiency and selectivity, particularly in converting carbon dioxide to useful compounds like formic acid, due to high energy requirements and low yields, and existing catalysts require complex separation processes and high costs.
Innovation Solution
A catalyst complex is developed, comprising two or more active metals (noble metals like ruthenium, iridium, and transition metals like zinc, nickel) supported on a carbonaceous or metal oxide support, which facilitates the conversion of carbon dioxide to formic acid and lactic acid using hydrocarbons with hydroxyl groups, enabling efficient energy use and easy separation of products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a homogeneous organometallic catalyst is used to promote the reaction of producing lactic acid and formic acid from glycerol and carbon dioxide, then the reaction efficiency is improved, but the catalyst must be separated from the reaction product mixture, increasing process complexity
Solution Approach 1:
The patent introduces a heterogeneous catalyst system where metal nanoparticles (Ru, Pd, Pt, or Rh) are supported on a solid carrier (activated carbon, silica gel, alumina, or molecular sieve). This intermediary structure allows the catalyst to remain in a fixed phase while reacting with liquid/gaseous substrates, enabling easy separation through filtration or decantation without compromising catalytic activity. The support material acts as a mediator that disperses metal particles and prevents their aggregation, maintaining high reaction efficiency while simplifying product separation.
2Quantity of substance
If direct hydrogenation of carbon dioxide using hydrogen is performed, then formic acid can be produced, but a great deal of energy resources are required due to high ΔG value
Solution Approach 1:
The patent changes the reaction parameters by using metal catalysts with different electronic structures and surface properties. The metal nanoparticles (Ru, Pd, Pt, Rh) provide alternative reaction pathways with lower activation energies. The catalysts modify the electronic state of reactants on their surfaces, enabling CO2 hydrogenation at milder conditions (lower temperature and pressure) compared to uncatalyzed reactions, thus reducing energy consumption while maintaining product yield.
Solution Approach 2:
The patent replaces the need for high mechanical energy input (high temperature and pressure) with a chemical catalysis mechanism. Instead of relying on thermal energy to overcome the high ΔG barrier, the system uses metal catalysts to provide an alternative reaction pathway with lower activation energy, substituting mechanical/thermal energy requirements with chemical catalytic action.
3Reliability
If conventional catalysts are used for carbon dioxide conversion, then the reaction can proceed, but the catalyst efficiency is unsatisfactory and requires complex separation processes
Solution Approach 1:
The patent employs composite catalyst materials consisting of metal nanoparticles dispersed on solid support matrices. The composite structure combines the high catalytic activity of metal particles (Ru, Pd, Pt, Rh) with the advantageous physical properties of support materials (activated carbon, silica gel, alumina, molecular sieves). This composite design enhances catalyst efficiency through synergistic effects while the solid support enables simple separation from reaction mixtures, eliminating complex separation processes.
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 complex achieves high yields of formic acid and lactic acid at lower temperatures, allows for easy separation and recycling, and enhances the overall efficiency of the carbon dioxide conversion process, reducing energy consumption and production costs.
Implementation Method 1
A catalyst complex is developed, comprising two or more active metals (noble metals like ruthenium, iridium, and transition metals like zinc, nickel) supported on a carbonaceous or metal oxide support, which facilitates the conversion of carbon dioxide to formic acid and lactic acid using hydrocarbons with hydroxyl groups
Data Source
AI summary
Proposed is a catalyst complex having high activity for carbon dioxide conversion reaction that converts carbon dioxide to useful compounds through reaction of carbon dioxide and hydrocarbon containing at least one hydroxyl group, and a carbon dioxide conversion process using the same, wherein the catalyst complex includes, as an active metal in the catalyst complex, at least one of noble metals and at least one of transition metals other than noble metals, thereby having high activity for the carbon dioxide conversion reaction.