Cellulose Hydrolysis Using Ionic Liquid Mediators
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Solution Overview
Problem
Current methods for hydrolyzing cellulose, such as enzyme hydrolysis and acid hydrolysis, face challenges including high costs, slow reaction rates, high energy requirements, and environmental concerns, limiting their widespread application in producing glucose and other sugars from biomass.
Innovation Solution
A method involving the use of formic acid or acetic acid mixed with chloride or bromide salts to dissolve cellulose at low temperatures, followed by a hydrolysis reaction under normal pressure, which results in a sugar product comprising glucose, xylose, mannose, arabinose, and oligosaccharides with high yield and rapid reaction times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If enzyme hydrolysis is used to hydrolyze cellulose, then the method is environmentally friendly with rare byproducts, but the reaction rate is slow and the process is complicated
Solution Approach 1:
The patent uses ionic liquids as an intermediary substance to dissolve cellulose before hydrolysis. The ionic liquid acts as a mediator that breaks down the crystalline structure of cellulose, making it more accessible to enzymes and significantly improving the hydrolysis rate while maintaining environmental friendliness through recyclability.
Solution Approach 2:
The patent changes the physical and chemical parameters of the hydrolysis process by using ionic liquids to alter the solubility and reactivity of cellulose. This parameter change enables faster enzyme access to cellulose bonds, increasing the reaction rate without compromising the environmental benefits of enzymatic hydrolysis.
2Ease of manufacture
If dilute acid hydrolysis is used to hydrolyze cellulose, then cheap sulfuric acid can be used as catalyst, but high temperature operation is required which increases energy consumption
Solution Approach 1:
The patent introduces ionic liquids as an intermediary that enhances the catalytic efficiency of sulfuric acid. The ionic liquid creates a more reactive environment that allows the hydrolysis reaction to proceed at lower temperatures, thereby reducing energy consumption while still using the inexpensive sulfuric acid catalyst.
Solution Approach 2:
The patent employs a composite system combining ionic liquids with dilute sulfuric acid. This composite approach leverages the low cost of sulfuric acid while the ionic liquid component enables lower operating temperatures, thus reducing energy consumption without sacrificing catalyst affordability.
3Use of energy by moving object
If concentrated acid hydrolysis is used to hydrolyze cellulose, then lower temperature and normal pressure can be used, but strong corrosivity and complicated post-treatment are problems
Solution Approach 1:
The patent uses ionic liquids as an intermediary that reduces the corrosivity of concentrated sulfuric acid during hydrolysis. The ionic liquid forms a protective environment that minimizes direct contact between the acid and equipment, reducing corrosion while maintaining the energy-efficient low-temperature operation of concentrated acid hydrolysis.
Solution Approach 2:
The patent converts the harmful corrosivity of concentrated sulfuric acid into a beneficial effect by using ionic liquids to selectively protect equipment surfaces. The ionic liquid creates a barrier that prevents acid attack on equipment while allowing the acid to effectively hydrolyze cellulose at low temperatures and normal pressure.
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 efficient cellulose hydrolysis at low temperatures and normal pressures, producing a high yield of sugars with reduced environmental impact and operational costs compared to existing methods.
Implementation Method 1
mixing formic acid or acetic acid and lithium chloride, magnesium chloride, calcium chloride, zinc chloride, iron chloride, lithium bromide, magnesium bromide, calcium bromide, zinc bromide, iron bromide, or heteropoly acid to form a mixing solution; adding a cellulosic biomass to the mixing solution for a dissolution reaction
Implementation Method 2
adding water to the mixing solution for a hydrolysis reaction to obtain a sugar product
Data Source
AI summary
In an embodiment of the present disclosure, a sugar product and method for fabricating the same is provided. The method includes mixing an acid compound and lithium chloride, magnesium chloride, calcium chloride, zinc chloride or iron chloride or lithium bromide, magnesium bromide, calcium bromide, zinc bromide or iron bromide or heteropoly acid to form a mixing solution, adding a cellulosic biomass to the mixing solution for a dissolution reaction, and adding water to the mixing solution for a hydrolysis reaction to obtain a sugar product. The present disclosure also provides a sugar product fabricated from the method.