Green Coffee Bean Steaming to Preserve Polyphenols and Reduce Caffeine
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional coffee processing methods result in high caffeine content and unpleasant odors, making it difficult for non-coffee lovers to consume coffee, as they require cumbersome roasting and grinding processes and lead to oxidation, altering the taste and aroma, and reducing the intake of beneficial polyphenols like chlorogenic acid.
Innovation Solution
A method involving steaming unroasted green coffee beans at low temperatures for 10-12 days using mineral water and tourmaline-immersed water, followed by drying at 38-43°C for 4-6 days, with the optional addition of Apios leaves and flowers to reduce bitterness and aroma, increasing polyphenol content while minimizing caffeine and unpleasant flavors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If green coffee beans are roasted at high temperature to extract coffee, then the taste and aroma are enhanced, but the polyphenol content decreases and oxidation occurs
Solution Approach 1:
The patent changes the processing parameters from high-temperature roasting to low-temperature steaming (70-80°C for 10-12 days), which preserves polyphenols while avoiding oxidation. This parameter change transforms the processing method to maintain beneficial compounds without the harmful effects of traditional roasting.
Solution Approach 2:
The patent utilizes phase transition of water from liquid to vapor during steaming to transfer heat gently to the coffee beans. This phase transition enables low-temperature processing that preserves polyphenols while the subsequent drying phase transition removes moisture to prevent oxidation.
2Ease of operation
If conventional roasting and grinding processes are used to prepare coffee, then the coffee taste is extracted, but the process becomes cumbersome and requires multiple steps
Solution Approach 1:
The patent merges multiple traditional steps (roasting, grinding, extraction) into a single steaming process followed by drying. This consolidation eliminates the need for separate roasting and grinding operations, making the process simpler and more straightforward while achieving the desired coffee preparation.
Solution Approach 2:
The patent segments the processing into two distinct phases: a long steaming phase (10-12 days at 70-80°C) followed by a drying phase (4-6 days at 38-43°C). This segmentation allows each phase to optimize for its specific function, simplifying the overall process by eliminating intermediate steps.
3Duration of action of stationary object
If green coffee beans are stored for long periods, then the supply is ensured, but oxidation occurs and the taste and aroma are altered
Solution Approach 1:
The patent uses phase transition to remove moisture through drying at 38-43°C for 4-6 days after steaming. This reduces water content to levels that inhibit oxidative reactions, thereby stabilizing the coffee beans during long-term storage while preserving taste and aroma.
Solution Approach 2:
The steaming process creates a water-vapor-dominated atmosphere that displaces oxygen during the 10-12 day processing period. This inert-like environment prevents oxidation of polyphenols and other sensitive compounds, and the subsequent sealing after drying maintains this protective environment during storage.
4Object-affected harmful factors
If the caffeine content is reduced to minimize side effects, then health benefits are improved, but the stimulating effect is reduced
Solution Approach 1:
The patent changes the processing parameters to low-temperature steaming (70-80°C) over an extended period (10-12 days), which selectively reduces caffeine content while preserving polyphenols. This parameter change achieves a better balance between minimizing side effects and maintaining beneficial health effects.
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 enhances the intake of beneficial polyphenols like chlorogenic acid while reducing caffeine and unpleasant odors, making coffee more palatable for non-coffee lovers by minimizing bitter and astringent tastes and aromas, thus increasing preference and daily consumption.
Implementation Method 1
steaming unroasted green coffee beans so as to increase the polyphenol content
Implementation Method 2
introducing water into the bottom of the container so as to be spaced apart from the lower surface of the mesh-like plate
Implementation Method 3
steaming the green coffee beans at low temperature for 10 to 12 days while maintaining the internal temperature of the heating cabinet at 70 to 80° C.
Implementation Method 4
drying the steamed green coffee beans for 4 to 6 days while maintaining the internal temperature of the heating cabinet at 38 to 43° C.
Implementation Method 5
placing the sealed container in a heating cabinet, and then steaming the green coffee beans at low temperature for 10 to 12 days while maintaining the internal temperature of the heating cabinet at 70 to 80° C.
Data Source
AI summary
Disclosed herein is a method for processing green coffee beans, including: (1) loading unroasted green coffee beans on a mesh-like plate, placing in a container the mesh-like plate having the green coffee beans loaded thereon, introducing water into the bottom of the container so as to be spaced apart from the lower surface of the mesh-like plate, and closing the lid of the container to seal the container; (2) placing the sealed container in a heating cabinet, and then steaming the green coffee beans at low temperature for 10 to 12 days while maintaining the internal temperature of the heating cabinet at 70 to 80° C.; and (3) opening the lid of the container, and then drying the steamed green coffee beans for 4 to 6 days while maintaining the internal temperature of the heating cabinet at 38 to 43° C.