Biomass Pretreatment via Internal Exothermic Heating
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Solution Overview
Problem
Current biomass pretreatment methods for producing biofuels and biochemicals require high energy, large amounts of industrial water, and result in excessive degradation and by-products that inhibit subsequent saccharification and fermentation processes.
Innovation Solution
An apparatus and method utilizing internal heating by a water-reactive anhydride, such as anhydrous ammonia, in a closed reactor to efficiently pretreat biomass, achieving uniform temperature distribution and reducing pretreatment time, with minimal industrial water usage and by-product formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional high-temperature pretreatment methods are used, then biomass can be effectively pretreated, but energy consumption increases and excessive degradation occurs
Solution Approach 1:
The patent changes the fundamental parameter of heating method from external high-temperature heating to internal heating via exothermic reaction. The water-reactive anhydride reacts with water in the biomass to generate heat internally, achieving effective pretreatment at lower external energy input while preventing excessive degradation that occurs with conventional high-temperature methods
Solution Approach 2:
The system uses the biomass's own water content to fuel the exothermic reaction, making the pretreatment process self-sufficient. The water-reactive anhydride utilizes the water already present in the biomass to generate the heat needed for pretreatment, eliminating the need for external energy input and reducing energy consumption
2Productivity
If conventional pretreatment methods are used, then biomass can be processed, but production costs increase due to high energy and chemical usage
Solution Approach 1:
The process uses the biomass's inherent water content to drive the exothermic reaction, eliminating the need for external energy sources and reducing operational costs. The water-reactive anhydride serves as both the heating source and the pretreating agent, consolidating multiple functions into a single reagent that reduces overall production costs
Solution Approach 2:
By changing from external heating to internal heating via exothermic reaction, the patent eliminates continuous energy input requirements and reduces chemical consumption. The reaction is self-sustaining once initiated, significantly reducing both energy and chemical costs while maintaining effective biomass processing capability
3Shape
If conventional high-temperature pretreatment is applied, then biomass structure can be modified, but by-products are formed that inhibit subsequent fermentation
Solution Approach 1:
The patent changes the temperature profile from high-temperature external heating to moderate-temperature internal heating. The exothermic reaction provides controlled heat generation that achieves necessary biomass structure modification for enzymatic accessibility while maintaining temperatures low enough to prevent excessive degradation and formation of inhibitory by-products
Solution Approach 2:
The water-reactive anhydride acts as an intermediary that enables structure modification without direct high-temperature exposure. The exothermic reaction serves as a mediator that transfers energy internally, allowing structural changes necessary for fermentation while avoiding the harmful effects of external high-temperature treatment
4Manufacturing precision
If external heating is used, then biomass can be pretreated, but temperature distribution is non-uniform and pretreatment time increases
Solution Approach 1:
The heating function is segmented from external source to distributed internal generation throughout the biomass. Each particle of water-reactive anhydride dispersed in the biomass generates heat locally where needed, creating uniform temperature distribution and eliminating the time delay associated with external heat penetration
Solution Approach 2:
The biomass particles themselves become the heating elements through the exothermic reaction. Each particle generates its own heat internally, eliminating the need for external heating and achieving uniform temperature distribution instantaneously throughout the biomass, dramatically reducing pretreatment time
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 approach significantly increases the recovery rate of fermentable sugars, reduces production costs, and minimizes the need for enzymes in saccharification, while maintaining efficient saccharification yields and reducing operational costs.
Implementation Method 1
contacting a water-reactive anhydride with a water-containing biomass to induce internal heating
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A method for pretreating a biomass, in which a water-reactive anhydride contacts a biomass, is disclosed, The biomass is pretreated using internal heating by an exothermic reaction. Further, an apparatus for pretreating a biomass having a reaction part including an inlet part and an outlet part for the water-reactive anhydride is disclosed.