Dehumidifying Absorbent Composition With Low Odor Emission
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Solution Overview
Problem
Existing dehumidification methods using ionic liquids, particularly those with dialkylimidazolium ions, suffer from the issue of releasing odorous substances when in contact with gas mixtures, which is undesirable in applications like indoor air conditioning and absorption chillers.
Innovation Solution
A process involving a liquid absorption medium comprising a mixture of trialkyl phosphate and specific dialkylimidazolium salts, which minimizes the release of foul-smelling substances by effectively dehumidifying moist gas mixtures while maintaining a low odor emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ionic liquids with dialkylimidazolium ions are used for dehumidification, then absorption capability is improved, but odor emission increases
Solution Approach 1:
The invention changes the chemical composition parameters of the ionic liquid by combining dialkylimidazolium salts with specific esters (carboxylic, sulfuric, or phosphoric esters) in defined ratios. This parameter modification allows the system to maintain high water absorption capability while significantly reducing odor emission, as the ester component suppresses the odorous substances released by the dialkylimidazolium ions during dehumidification operations
2Temperature
If conventional air conditioning systems cool humid air, then cooling effect is achieved, but dehumidification requires additional energy consumption
Solution Approach 1:
The invention extracts the dehumidification function from the cooling process by introducing a separate absorption medium that selectively removes water vapor from the air. This allows the cooling system to operate independently without needing to overcool the air for dehumidification purposes, thereby reducing overall energy consumption while maintaining both cooling and dehumidification effects
3Quantity of substance
If absorption medium contacts moist gas mixture, then dehumidification is achieved, but chemical substances are released into ambient air
Solution Approach 1:
The invention converts the potentially harmful odorous substances released during absorption into a beneficial effect by using the ester component to suppress and mask these odors. The ester acts as a flavoring or masking agent that transforms the harmful olfactory contamination into an acceptable or even pleasant sensory experience, allowing efficient dehumidification without compromising indoor air quality
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 process efficiently dehumidifies moist gas mixtures with reduced odor emission, making it suitable for applications such as air conditioning and natural gas refinement, where odor contamination is a concern.
Implementation Method 1
the moist gas mixture G1 is contacted with a liquid absorption medium A1... to obtain a gas mixture G2 which has a lower water content compared to the moist gas mixture G1 and a liquid absorption medium A2 which has an elevated water content compared to the liquid absorption medium A1
Data Source
AI summary
The invention relates to a process for dehumidifying a moist gas mixture in which the moist gas mixtures are brought into contact with an absorbent comprising dialkylimidazolium salts and trialkyl phosphate. In addition, the invention also relates to an absorption heat pump comprising the absorbent according to the invention and to the absorbent according to the invention itself.