Mid-Infrared Laser CO2 Decomposition for Safe Carbon Recovery
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Solution Overview
Problem
Current methods for decomposing CO2 are often costly, dangerous, and inefficient, requiring harsh conditions or radiation sources, and fail to effectively produce carbon-oxygen structures at low pressures.
Innovation Solution
A method using mid-infrared laser irradiation between 2.3 to 3.3 microns to decompose CO2 gas in the presence of water vapor at low pressures, forming carbon particles and carbon-oxygen structures, utilizing an Er: YAG or HF laser to photo-dissociate CO2 into carbon and oxygen, with the reaction occurring in a glass vessel under controlled conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods (plasma, UV, catalysts) are used to decompose CO2, then decomposition can be achieved, but the conditions are drastic, dangerous, and costly
Solution Approach 1:
The patent replaces complex mechanical and chemical systems (plasma generators, UV sources, catalyst reactors) with a simple infrared laser system. The laser directly heats CO2 molecules through resonant absorption, causing decomposition without requiring plasma discharge, UV radiation, or catalytic materials. This substitution dramatically simplifies the system while improving safety by eliminating dangerous high-voltage plasma and intense UV sources.
Solution Approach 2:
The patent changes the operational parameters from extreme conditions (high voltage for plasma, intense UV radiation, high temperature catalysts) to mild infrared laser heating at atmospheric pressure. By using infrared radiation that matches the natural vibrational frequency of CO2 molecules, the system achieves decomposition under safe, controllable conditions without requiring drastic parameter changes.
2Productivity
If supercritical CO2 conditions are used for decomposition, then decomposition efficiency improves, but the process requires high pressure and temperature
Solution Approach 1:
The patent introduces water vapor as a composite medium mixed with CO2. The water vapor absorbs infrared laser energy and transfers heat to CO2 molecules through molecular collisions, enhancing decomposition efficiency. This composite gas mixture allows efficient energy transfer without requiring the high temperatures and pressures of supercritical conditions, as the laser selectively heats the CO2-H2O mixture at atmospheric pressure.
3Loss of substance
If traditional decomposition methods are used, then CO and oxygen are produced, but carbon particles and unwanted byproducts are formed
Solution Approach 1:
The patent uses pulsed infrared laser irradiation instead of continuous heating. The periodic pulses allow CO2 molecules to absorb energy, decompose, and then cool down between pulses, preventing excessive carbon particle aggregation. This periodic action controls the decomposition process to maximize CO and oxygen production while minimizing unwanted carbon soot formation that occurs with continuous high-temperature heating.
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 provides a safe, low-cost, and effective way to remove CO2 from combustion gases, producing carbon particles and carbon-oxygen structures while generating energy, and does not require additional energy sources, with the process being environmentally friendly and capable of operating at low pressures.
Implementation Method 1
a laser in the mid-infrared at 2.94 μm produces carbon particles and carbon-oxygen structures due to the laser radiation interaction with the —OH groups created by the presence of water vapor and to the high temperature rise caused by the photo-excitation of —OH groups
Implementation Method 2
the high temperature rise caused by the photo-excitation of —OH groups
Implementation Method 3
the high temperature rise caused by the photo-excitation of —OH groups
Implementation Method 4
combining the carbon dioxide gas with water vapor gas molecules to form a weakly bonded carbon dioxide-water or carbonic acid
Data Source
AI summary
A method of producing carbon-oxygen structures by the Decomposition of Carbon Dioxide Gas at low pressure, from 14.7 to 100 psi, using laser irradiation in the mid-infrared spectrum, from 2.3 to 3.3 microns.