Catalytic CO2 Conversion Process Using Adsorption and Hydrogenation
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Solution Overview
Problem
Existing processes for converting carbon dioxide to hydrocarbons face inefficiencies due to geographic and capacity constraints, low carbon dioxide concentration in ambient air, and the need for decomposing carbon dioxide sequestering materials, which limits flexibility and increases inefficiency.
Innovation Solution
A catalytic process involving a catalytic material with adsorbed carbon dioxide, contacted with hydrogen at temperatures between 25° C to 1000° C, allowing for efficient conversion of carbon dioxide to hydrocarbons without the need for decomposing sequestering materials, using renewable energy sources like solar energy for hydrogen production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carbon dioxide is isolated from the atmosphere and processed through multiple reaction steps, then hydrocarbons can be produced, but the process complexity and geographic constraints increase
Solution Approach 1:
The patent combines carbon dioxide adsorption and hydrogenation reaction into a single integrated catalytic process. The catalytic material simultaneously performs CO2 capture from the atmosphere and converts it to hydrocarbons through hydrogenation, eliminating the need for separate isolation and reaction steps required in prior art processes.
Solution Approach 2:
The catalytic material serves multiple functions: it acts as both a CO2 adsorbent and a hydrogenation catalyst. This multi-functional material enables the system to perform atmospheric CO2 capture, concentration, and conversion to hydrocarbons in one operation, reducing process complexity while maintaining productivity.
2Quantity of substance
If carbon dioxide sequestering materials are decomposed to release CO2, then CO2 becomes available for reaction, but energy consumption and process inefficiency increase
Solution Approach 1:
The catalytic material pre-adsorbs carbon dioxide from the atmosphere before the hydrogenation reaction occurs. This preliminary capture and concentration of CO2 on the catalyst surface eliminates the need for subsequent decomposition steps, making CO2 immediately available for reaction without additional energy input.
Solution Approach 2:
The system uses atmospheric CO2 directly as the carbon source, eliminating the need for external CO2 generation or decomposition of sequestering materials. The catalytic material self-sufficiently captures and processes CO2 from the air, reducing energy consumption and process inefficiency associated with CO2 release from storage materials.
3Adaptability or versatility
If carbon dioxide concentration in ambient air is low, then direct conversion is difficult, but the process becomes more flexible and geographically unconstrained
Solution Approach 1:
The catalytic material creates a localized high-concentration CO2 environment on its surface through adsorption, even though atmospheric CO2 concentration is low. This local concentration effect enables efficient hydrogenation reactions while maintaining the ability to operate anywhere with atmospheric CO2, providing both flexibility and sufficient reactant concentration.
Solution Approach 2:
The catalytic material utilizes porous structures to adsorb and concentrate CO2 from the atmosphere. The porous architecture provides high surface area for CO2 capture, enabling the system to overcome low ambient CO2 concentrations while maintaining process flexibility and geographic adaptability.
4Productivity
If multiple reaction steps are used to convert CO2 to hydrocarbons, then conversion can occur, but reaction conditions become more stringent and complex
Solution Approach 1:
The patent merges CO2 adsorption and hydrogenation into a single reaction step occurring on the catalytic material surface. This integrated approach eliminates the need for multiple sequential reactions with varying temperature and pressure conditions, simplifying the thermal and operational requirements while maintaining high conversion 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
This process enhances carbon dioxide conversion efficiency by providing carbon dioxide directly to the catalyst surface, reducing geographic and capacity constraints, and enabling flexible hydrocarbon production while utilizing renewable energy, producing hydrocarbons like methanol and alkanes under milder conditions.
Implementation Method 1
providing a catalytic material having carbon dioxide adsorbed thereto
Implementation Method 2
contacting the catalytic material of step (i) with hydrogen at a temperature in the range of from 25° C. to 1000° C., preferably from 200° C. to 500° C., whereby a reaction product is formed
Data Source
AI summary
Disclosed is a process for reacting carbon dioxide with hydrogen. In the process a catalyst having carbon dioxide adsorbed thereto is contacted with hydrogen at an elevated temperature. The catalyst can be regenerated by contacting depleted catalyst with a carbon dioxide source, for example a flue gas of a power plant. In a preferred embodiment carbon dioxide is reacted by in situ hydrolysis of water.