Ionic Lignin Polymers for CO2 Capture and Cyclic Carbonates
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Solution Overview
Problem
Existing technologies lack effective compositions and methods for capturing and utilizing carbon dioxide (CO2) from industrial emissions, particularly focusing on the conversion of captured CO2 into valuable substances, with current methods being limited by unstable chemical properties and flammability of epoxide substrates.
Innovation Solution
Development of modified ionic lignin polymers that can capture CO2 and convert it into high-value chemicals by reacting with carbon dioxide, forming bicarbonate and carbamates, and further converting these into cyclic carbonates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If epoxide substrates are used for CO2 conversion, then cyclic carbonates can be produced, but the process is limited by unstable chemical properties and flammability
Solution Approach 1:
The patent changes the chemical parameters by replacing epoxide substrates with phenolic compounds as the starting material. This fundamental parameter change eliminates the flammability and instability issues associated with epoxides while enabling CO2 conversion to cyclic carbonates through a different chemical pathway involving quaternary ammonium salts
Solution Approach 2:
The patent employs readily available, stable phenolic compounds from lignin as a renewable resource instead of relying on unstable epoxide substrates. This substitution uses abundant, safe materials to achieve the same CO2 fixation goal without the harmful properties of epoxides
2Adaptability or versatility
If lignin is used for high-value chemical production, then dependency on petroleum-based raw materials is reduced, but current utilization is limited to low-value fuel combustion
Solution Approach 1:
The patent transforms lignin from a low-value combustion feedstock into a high-value chemical precursor by changing the reaction parameters and pathways. Through quaternization reactions and CO2 fixation, lignin derivatives are converted into cyclic carbonates and other valuable chemicals, fundamentally changing the value proposition of lignin utilization
Solution Approach 2:
The patent converts what was previously considered waste lignin (a harmful environmental byproduct) into valuable chemical feedstocks. By transforming lignin's chemical structure through modification and reaction with CO2, the patent turns a disposal problem into a resource opportunity, creating high-value chemicals from waste material
3Object-affected harmful factors
If CO2 is captured and stored (CCS), then greenhouse gas emissions are reduced, but the process is expensive because CO2 is handled as useless waste
Solution Approach 1:
The patent transforms CO2 from a waste product to be disposed of into a valuable chemical feedstock. By incorporating CO2 into the molecular structure of cyclic carbonates and other chemicals, the process converts a harmful emission into a beneficial resource, eliminating disposal costs and creating economic value from what was previously wasted
Solution Approach 2:
The patent enables CO2 to serve itself by being directly incorporated into useful chemical products without requiring external energy-intensive compression, storage, or transportation infrastructure. The CO2 is utilized in situ through chemical reactions, making the system self-sufficient and eliminating the need for expensive CCS infrastructure
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 modified ionic lignin polymers effectively capture and utilize CO2, providing a sustainable route for reducing greenhouse gas emissions and producing high-value chemicals, thereby reducing dependency on petroleum-based raw materials.
Implementation Method 1
CO2 capturing mechanisms prevalently consist of adsorption and absorption. Adsorption is the process in which CO2 adheres to the surface of an adsorbent by either weak van der Waals forces (physisorption) or stronger chemical bonds (chemisorption).
Implementation Method 2
CO2 adheres to the surface of an adsorbent by either weak van der Waals forces (physisorption) or stronger chemical bonds (chemisorption).
Implementation Method 3
reacting the polymeric material with the carbon dioxide to form a compound comprising one or more fragments of formula (VI)... reacting with carbon dioxide, forming bicarbonate and carbamates
Data Source
AI summary
Disclosed herein are lignin-based polymeric materials and methods of making the same. The disclosed polymeric materials can reversibly capture CO2. Also disclosed are methods of forming high-value chemicals from the captured carbon dioxide by the polymeric materials disclosed herein. Also disclosed herein are methods of making polyhydroxyurethanes by reacting lignin-base materials with polyamines.