Solid-Supported Ionic Liquid Catalysts for Biomass Hydrolysis
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Solution Overview
Problem
Current methods for liberating sugars from lignocellulosic materials are inefficient in terms of yield and require significant water and energy, and struggle to effectively digest cellulose and hemicellulose, especially the crystalline domains, limiting their commercial viability.
Innovation Solution
The use of polymeric catalysts and solid-supported catalysts with acidic and ionic monomers that disrupt hydrogen bonds and penetrate the crystalline structure of cellulose, allowing for effective hydrolysis of cellulose and hemicellulose into monosaccharides and oligosaccharides, with the ability to be recycled and reused.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current hydrolysis methods are used to liberate sugars from lignocellulosic materials, then the process can proceed with conventional catalysts, but the yield is inefficient and significant water and energy are required
Solution Approach 1:
The patent changes the chemical parameters of the catalyst by incorporating ionic liquid functionalities into a solid support matrix, creating a dual-functional catalyst that operates under milder conditions. This parameter change enables higher sugar yields while reducing energy and water consumption compared to conventional acid catalysts
Solution Approach 2:
The patent employs a composite catalyst structure combining solid support material with ionic liquid components. This composite approach integrates the stability of solid catalysts with the high reactivity and selectivity of ionic liquids, achieving improved productivity and reduced resource consumption
2Productivity
If current hydrolysis methods are used, then conventional catalysts can be employed, but they are unable to achieve appreciable digestion of cellulose or hemicellulose, especially crystalline domains
Solution Approach 1:
The patent applies local quality by creating catalysts with spatially distributed active sites that can access different regions of the cellulose structure. The ionic liquid functionalities are positioned on the solid support surface to specifically target and disrupt the crystalline domains, enabling effective digestion where conventional catalysts fail
Solution Approach 2:
The ionic liquid component acts as an intermediary that facilitates the interaction between the solid catalyst support and the cellulose substrate. It mediates the hydrolysis process by penetrating crystalline structures and enabling water access to glycosidic bonds, thereby improving digestion efficiency
3Ease of operation
If conventional acid catalysts are used for hydrolysis, then the reaction can proceed, but solvent extraction and distillation are required for catalyst recovery
Solution Approach 1:
The patent replaces the mechanical separation processes (extraction and distillation) with a simple filtration operation. By immobilizing the ionic liquid functionality on a solid support, the catalyst becomes easily separable from the liquid reaction mixture through filtration, eliminating complex solvent recovery systems
Solution Approach 2:
The solid-supported ionic liquid catalyst can be easily discarded after use without requiring complex recovery and regeneration processes. The simple filtration operation allows for rapid catalyst removal, and the catalyst can be reused or disposed of without significant cost or complexity
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 enhances the yield and kinetics of sugar production from biomass, reduces the cost of converting lignocellulose into industrial chemicals, and allows for easier recovery of the catalyst, avoiding the need for solvent extraction and distillation.
Implementation Method 1
polymeric catalysts and solid-supported catalysts with acidic and ionic monomers that disrupt hydrogen bonds and penetrate the crystalline structure of cellulose
Implementation Method 2
allowing for effective hydrolysis of cellulose and hemicellulose into monosaccharides and oligosaccharides
Data Source
AI summary
Provided herein are catalysts useful in non-enzymatic saccharification processes. The catalysts can be polymeric catalysts or solid-supported catalysts with acidic and ionic moieties. Provided are also methods for hydrolyzing cellulosic materials into monosaccharides and/or oligosaccharides using the catalysts described herein.