Lignin Pellet Production System for Cellulosic Ethanol Co-Product Recovery
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Solution Overview
Problem
Current biomass processing for ethanol production faces inefficiencies in utilizing lignin as a co-product, particularly in handling and converting it into a usable form, such as pellets, which affects the overall efficiency and yield of cellulosic ethanol production.
Innovation Solution
A system is developed to produce lignin pellets with at least 50% lignin by dry weight by pre-treating lignocellulosic biomass, separating it into components, hydrolyzing, and then using a pelleting apparatus to create pellets, ensuring that the lignin is not sulfonated and is processed to improve handling and energy utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lignin is recovered as a co-product from cellulosic ethanol production, then energy utilization is improved, but handling and conversion efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the sulfonation level of lignin to be less than 50% sulfonated, and optimizing the particle size distribution with at least 20% of particles smaller than 0.5 mm. These parameter adjustments transform lignin from a difficult-to-handle byproduct into a form that is both energy-efficient and easy to handle for combustion applications
Solution Approach 2:
The patent utilizes phase transitions by drying lignin to reduce moisture content to less than 30%, and optimizing particle size to create a material that transitions from a wet, clumpy byproduct to a dry, free-flowing fuel material suitable for handling and combustion
2Use of energy by moving object
If lignin is used as solid fuel with high energy content, then energy value is improved, but processing complexity increases
Solution Approach 1:
The patent applies extraction by separating lignin from the cellulosic ethanol production process as a distinct co-product stream. This extraction allows lignin to be processed independently with optimized parameters (sulfonation <50%, moisture <30%, fine particles >20%) rather than being handled as part of the complex ethanol production system
Solution Approach 2:
The patent simplifies processing by changing key parameters of lignin: limiting sulfonation to less than 50% (compared to highly sulfonated lignin from conventional processes), controlling moisture to less than 30%, and optimizing particle size distribution. These parameter changes make lignin inherently easier to process while maintaining high energy value
3Reliability
If lignin pellets are produced with at least 50% lignin by dry weight, then fuel quality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-processing lignin during the cellulosic ethanol production to achieve the desired sulfonation level (<50%) and particle size distribution (>20% fine particles) before pelletization. This preliminary preparation simplifies the subsequent pelletizing process and ensures consistent fuel quality without requiring complex post-processing equipment
Solution Approach 2:
The patent improves fuel quality by controlling lignin parameters (sulfonation <50%, moisture <30%, particle size optimization) and combines this with pelletization to achieve at least 50% lignin by dry weight. These parameter changes create a reliable, high-quality fuel product while keeping manufacturing complexity manageable through process integration
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 system enhances the efficiency and yield of cellulosic ethanol production by converting lignin into manageable pellets, improving its handling and energy utilization, thereby optimizing the use of lignin as a valuable co-product.
Implementation Method 1
pre-treating lignocellulosic biomass into pre-treated biomass; separating the pre-treated biomass into a first liquid component comprising sugars and a first solids component comprising cellulose and the lignin composition; hydrolysing the first solids component of the pre-treated biomass into a hydrolysed biomass comprising sugars and the lignin composition
Data Source
AI summary
A system for treating biomass for the production of a composition of lignin pellets .is disclosed. Pellets comprising at least 50 percent lignin by dry weight is disclosed. Also disclosed are pellets produced from a lignin composition by a process comprising: pre-treating lignocellulosic biomass into pre-treated biomass; separating the pre-treated biomass into a first liquid component comprising sugars and a first solids component comprising cellulose and the lignin composition; hydrolysing the first solids component of the pre-treated biomass into a hydrolysed biomass comprising sugars and the lignin composition; separating the hydrolysed biomass into a second liquid component comprising sugars and a second solids component comprising the lignin composition; supplying the second solids component comprising the lignin composition to a pelleting apparatus to produce the pellets; wherein the lignocellulosic biomass comprises cellulose, hemi-cellulose and lignin. According to an aspect, at least a portion of the lignin is not sulfonated.