Biomass Delignification via Acid Peroxide Capping
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Solution Overview
Problem
Current biomass delignification processes are inefficient, energy-intensive, and difficult to scale, leading to marginal yields and excessive processing costs, as they often damage cellulose and lignin, making it challenging to produce high-quality cellulose and lignin products for industrial applications.
Innovation Solution
A composition comprising an acid, a peroxide, and a capping agent is used for delignification at low temperatures and atmospheric pressure, which prevents further depolymerization of lignin and preserves its integrity, allowing for the separation of lignin from cellulose without degrading the cellulose fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional delignification processes are used to remove lignin from biomass, then lignin removal efficiency is improved, but cellulose integrity is damaged and processing costs increase
Solution Approach 1:
A capping agent is introduced as an intermediary substance that selectively binds to lignin fragments during delignification. This mediator allows lignin to be removed while preventing unwanted side reactions that would damage cellulose, thus resolving the contradiction between lignin removal efficiency and cellulose integrity
Solution Approach 2:
The patent employs peroxide-based oxidation systems with controlled parameters (temperature, concentration, time) to achieve selective lignin depolymerization. By carefully controlling these parameters, the process removes lignin effectively while maintaining cellulose structure, resolving the contradiction between removal efficiency and structural preservation
2Quantity of substance
If conventional delignification processes are used to separate lignin from cellulose, then delignification effectiveness is improved, but energy consumption increases
Solution Approach 1:
The patent replaces energy-intensive mechanical and thermal delignification methods with a chemical oxidation system using peroxides. This substitution achieves effective lignin removal through chemical reactions at lower temperatures, significantly reducing energy consumption while maintaining delignification effectiveness
Solution Approach 2:
Peroxide-based strong oxidants are used to accelerate the depolymerization of lignin at relatively low temperatures. This approach achieves rapid and effective delignification without requiring the high energy inputs needed by conventional thermal or mechanical processes
3Quantity of substance
If conventional delignification processes are used to remove lignin, then lignin separation is improved, but processing costs increase
Solution Approach 1:
The capping agent that binds to lignin fragments can be recovered and reused in subsequent delignification cycles. This recovery and reuse strategy reduces the cost of processing by minimizing the consumption of chemical reagents, thereby reducing overall processing costs while maintaining effective lignin separation
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 achieves substantial lignin removal with minimal cellulose loss, maintaining the integrity of lignin and cellulose, reducing energy consumption, and environmental impact, making it a more viable and cost-effective alternative to traditional pulping processes.
Implementation Method 1
a peroxide... which prevents further depolymerization of lignin
Implementation Method 2
A composition comprising an acid, a peroxide, and a capping agent is used for delignification
Data Source
AI summary
Method of delignification of plant material, said method comprising: providing said plant material comprising cellulose fibres and lignin; exposing said plant material requiring to a composition comprising:an acid;a capping agent; anda peroxide;for a period of time sufficient to remove substantially all (at least 80%) of the lignin present on said plant material. Also disclosed are compositions to accomplish such delignification and processes using such.