Cellulose Conversion System Using Solid Acid Catalysts
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Solution Overview
Problem
Existing methods for hydrolyzing cellulose to produce sugar are not economically viable due to the crystalline structure of cellulose and the presence of lignin, which results in low sugar yield and high energy expenditure.
Innovation Solution
A system and method utilizing a solid-solid reaction with a set of rollers and micro-mixing to convert cellulose into sugar, optimizing internal conditions with atmospheric equilibrium sensors and solid acid catalysts to maximize sugar output while minimizing energy waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydrolysis methods are used to convert cellulose to sugar, then the process can proceed with existing technology, but the sugar yield is low and energy expenditure is high due to the crystalline structure of cellulose and presence of lignin
Solution Approach 1:
The patent applies preliminary action by mechanically pre-treating the cellulose material before hydrolysis. The system uses a mechanical pre-treatment device to disrupt the crystalline structure of cellulose and remove lignin barriers in advance, making the cellulose more accessible to enzymes. This preliminary mechanical action reduces the energy required during the subsequent hydrolysis process and increases sugar yield by improving enzyme accessibility to the cellulose chains.
2Manufacturing precision
If enzymes or acid catalysts are used to hydrolyze cellulose, then the glycosidic linkage can be cleaved to produce monomeric sugar, but the crystalline structure of cellulose limits accessibility and reduces efficiency
Solution Approach 1:
The patent applies segmentation by dividing the cellulose material into smaller, more accessible units through mechanical pre-treatment. The pre-treatment device breaks down the large crystalline cellulose structures into smaller segments, increasing the surface area and creating more accessible sites for enzyme or acid catalyst action. This segmentation overcomes the recalcitrance of the crystalline structure by physically disrupting the ordered arrangement of cellulose chains.
Solution Approach 2:
The patent introduces a mechanical pre-treatment process as an intermediary step between the raw cellulose material and the hydrolysis reaction. This intermediary mechanical action modifies the cellulose structure to remove lignin and disrupt crystallinity, creating a more favorable substrate for the subsequent enzymatic or acid-catalyzed hydrolysis. The mechanical pre-treatment acts as a mediator that bridges the gap between recalcitrant raw material and the hydrolysis catalysts.
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 achieves a high yield of monomeric sugar with reduced alternative product formation and sugar loss, providing an efficient and cost-effective method for cellulose utilization.
Implementation Method 1
Hydrolysis, meaning water-cleavage is a reaction involving the breaking of a bond in a molecule using water. Hydrolysis of cellulose yields a mixture of simple reducing sugars, mainly glucose.
Implementation Method 2
Enzymes are a specific type of catalyst, like liquid or solid acids.
Data Source
AI summary
A device for converting cellulose to sugar has a reaction chamber with a plurality of control components, and a control assembly. The control assembly is operatively connected to the reaction chamber, a drive assembly and control components to transmit and receive interoperability signals. The device has an inlet hopper with a detector, a crusher, an outlet hopper, a sensor assembly, a steam inlet, and a carbon dioxide inlet. The inlet hopper is configured to receive and analyze proportion data of matters in a feedstock and catalyst mixture via the detector. The crusher receives and grinds the mixture from the inlet hopper to induce chemical reaction for producing sugar. The outlet hopper is configured to determine a proportion data of matter in the grinded mixture. The control assembly is configured to determine adjustments need to be performed on the components and drive assembly to optimize the sugar production.