Device for separating and sequestering carbon dioxide in gas mixtures by hydrate method with coupled cold storage
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Solution Overview
Problem
Current carbon capture and sequestration technologies lack integrated systems for mixed gas applications, leading to inefficiencies and high energy consumption, and there is a need for effective methods to minimize energy loss and enhance carbon dioxide sequestration, particularly in ocean environments.
Innovation Solution
A device for separating and storing carbon dioxide using the hydrate method coupled with cold storage, featuring a primary separation trunk circuit and two parallel branches for methane and carbon dioxide recovery, along with a gas hydrate sequestration apparatus and a cold storage system, utilizing a refrigeration cycle and sensing/monitoring equipment to optimize the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hydrate method is used for carbon dioxide capture from mixed gases, then separation efficiency is improved, but device complexity increases due to lack of mature integrated systems
Solution Approach 1:
The device is divided into multiple independent functional modules including compression modules, heat exchange modules, hydrate formation modules, and decomposition modules. Each module performs a specific function in the carbon dioxide separation process, allowing for modular assembly and operation while achieving high separation efficiency from mixed gases.
Solution Approach 2:
The integrated system combines multiple functions into a unified device that can compress, cool, form hydrates, and decompose hydrates all in one system. The device handles mixed gas separation while simultaneously managing temperature and pressure control, making it a multi-functional solution for carbon dioxide capture from various gas sources.
2Device complexity
If conventional carbon capture methods are used, then device complexity is reduced, but energy consumption increases
Solution Approach 1:
The device utilizes the phase transition of carbon dioxide into hydrate form under specific temperature and pressure conditions. By controlling the phase change from gas to hydrate and back to gas during decomposition, the system achieves energy-efficient separation without requiring complex high-energy processes, leveraging natural thermodynamic properties of hydrate formation.
Solution Approach 2:
The system optimizes energy consumption by dynamically adjusting temperature and pressure parameters throughout the process. Compression increases pressure while heat exchange modules control temperature to facilitate hydrate formation, and decomposition reverses these parameters to release pure carbon dioxide, creating an energy-efficient cyclic process.
3Manufacturing precision
If multi-stage separation is implemented, then carbon dioxide purity is improved, but process time increases
Solution Approach 1:
The device operates in continuous multi-stage cycles where compression, cooling, hydrate formation, and decomposition occur sequentially without interruption. While one stage is forming hydrates, another stage is decomposing them, maintaining continuous production flow and achieving high purity carbon dioxide output without significant time delays between stages.
Solution Approach 2:
The compression and cooling stages prepare the mixed gas in advance before hydrate formation occurs. By pre-compressing and pre-cooling the gas to optimal conditions, the hydrate formation process proceeds rapidly and efficiently, reducing the overall time required for high-purity carbon dioxide separation while ensuring the necessary purity is achieved.
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 device achieves multi-stage separation of methane and carbon dioxide, reduces refrigeration energy consumption, and enables efficient sequestration of carbon dioxide as a hydrate, with no added chemicals or secondary pollution, offering environmental and economic benefits.
Implementation Method 1
A device utilizing the hydrate method for separating and sequestrating carbon dioxide from mixed gases
Implementation Method 2
a carbon dioxide hydrate formation reactor and a carbon dioxide hydrate decomposition reactor
Implementation Method 3
a primary biogas refrigeration cycle heat exchanger... connected to a primary biogas cooling tower for circulating heat exchange
Implementation Method 4
primary biogas cooling tower for circulating heat exchange... secondary biogas cooling tower for circulating heat exchange
Data Source
AI summary
A device for separating and sequestrating carbon dioxide coupled with cold storage in mixed gas via hydrate method, which belongs to the technical field of application of natural gas hydrates includes a gas compression device, a refrigeration cycle device, a hydrate formation/decomposition device, a hydrate cold storage device, a water circulation device and a sensing and monitoring device; taking the separation and sequestration of biogas as an example, the refrigeration cycle device enables the cooling of biogas, decomposition of gas at all levels, hydrate, and circulating water to provide the low-temperature conditions required for hydrate formation; the hydrate cold energy storage device can fully use the latent heat of hydrate phase change to provide the required cooling capacity on the user side; the water circulation device can realize the recycling of decomposition water to ensure the continuous formation of hydrate.