Amorphous Granular Starch Ethylene Adsorption
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Solution Overview
Problem
Current methods for adsorbing ethylene gas, such as using cyclodextrin, are costly, complex, and have low sample recovery and adsorption rates, making them unsuitable for large-scale production in the food industry.
Innovation Solution
The method involves processing starch granules into amorphous granular starch through alcoholic-alkaline treatment, forming a V-type single helix structure that facilitates the adsorption of ethylene gas, with a simple and cost-effective process that includes pulping, reaction, neutralization, and drying, followed by adsorption in a high-pressure reactor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cyclodextrin is used to adsorb ethylene gas through liquid phase method, then ethylene adsorption is achieved, but the cost is high, the process is complicated, and the sample recovery rate and adsorption rate are low
Solution Approach 1:
The patent replaces expensive cyclodextrin with inexpensive starch as the adsorbent material. Starch is a readily available, low-cost biomass resource that can achieve effective ethylene adsorption, thereby reducing production costs while maintaining adsorption functionality.
Solution Approach 2:
The patent transforms starch from its native crystalline structure to an amorphous structure through alkaline treatment and controlled drying. This parameter change in molecular arrangement creates the necessary cavity structure for ethylene adsorption, achieving high adsorption rates without complex liquid phase processes.
2Quantity of substance
If cyclodextrin is used to adsorb ethylene gas, then ethylene adsorption is achieved, but the sample recovery rate is low
Solution Approach 1:
The patent uses starch instead of cyclodextrin, where the starch-based adsorbent can be easily separated and reused multiple times without significant loss of adsorption capacity, ensuring high sample recovery rates and reliable continuous operation.
3Ease of manufacture
If starch granules are processed into amorphous granular starch through alcoholic-alkaline treatment, then the preparation process is simple and cost is low, but the structure must be transformed to achieve adsorption
Solution Approach 1:
The patent employs alkaline treatment (adding NaOH) to starch granules followed by controlled drying to transform the crystalline starch structure into an amorphous structure. This parameter change in molecular arrangement creates the necessary cavity structure for ethylene adsorption while maintaining process simplicity.
Solution Approach 2:
The patent utilizes the phase transition of starch from crystalline to amorphous state through alkaline treatment and controlled drying. This phase transition creates the appropriate pore and cavity structure necessary for gas adsorption without requiring complex processing steps.
4Productivity
If amorphous granular starch is used to adsorb ethylene gas, then the sample recovery rate and ethylene adsorption rate are significantly improved, but high-pressure reactor conditions are required
Solution Approach 1:
The patent uses alkaline treatment to modify the starch structure, creating an amorphous form with enhanced adsorption capabilities that allows efficient ethylene uptake under controlled pressure conditions in a high-pressure reactor.
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 significantly increases the ethylene adsorption rate and sample recovery rate, making it suitable for large-scale food preservation and providing a novel choice for gas adsorption and encapsulation technology.
Implementation Method 1
The adsorption of ethylene gas by cyclodextrin has been reported... the adsorption process is complicated with a low sample recovery rate and ethylene adsorption rate
Implementation Method 2
the gas physically captured in solid matrices has characteristics such as slow release, which is an important application if small amount and continuous possession are necessary
Implementation Method 3
the starch molecule forms a V-type single helix structure complex with ethanol. Ethanol volatilizes during the drying process, and cavities are formed in the single helix structure of the starch particles
Implementation Method 4
at the same time, ethanol solution can restrict the swelling of the particles, thereby maintaining the integrity of the particles
Implementation Method 5
The hydrophobic cavity of the amorphous granular starch facilitates the entry of non-polar gases, which can achieve the purpose of adsorbing ethylene
Implementation Method 6
Ethanol volatilizes during the drying process, and cavities are formed in the single helix structure of the starch particles
Data Source
AI summary
The invention discloses a method for adsorbing ethylene gas using amorphous granular starch. The method firstly prepares amorphous granular starch, wherein starch slurry is prepared from starch with a ethanol aqueous solution and NaOH solution is added dropwise so as to react at 30 to 35° C. for 20 to 50 minutes; Then the slurry is centrifuged, neutralized with an ethanol hydrochloride solution, washed and dried to obtain the amorphous granular starch. The amorphous granular starch is placed in a high-pressure reactor and ethylene gas is introduced after the reactor is vacuumized to react at 0.8 to 1.5 Mpa and 20 to 30° C. for 15 to 25 h so that starch powder product adsorbing with ethylene is obtained. The test result shows that the content of ethylene in the obtained product can reach more than 30%. The method is simple, highly efficient and cheap for the adsorption process of ethylene, and the product is expected to be widely applied in the field of fruit and vegetable modified atmosphere preservation.