A gas separation method and separation system based on porous material

A porous material and gas separation technology, applied in the separation system, in the field of gas separation based on porous materials, can solve the problems of limited effect of strengthening means, affecting the reaction speed, separation coefficient and efficiency, etc. -Effect of water contact area and improvement of gas separation coefficient

Active Publication Date: 2017-09-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] At present, although the hydrate separation method has achieved good results in laboratory research, and has superior safety performance in the separation of flammable gases such as methane, however, since the hydrate formation process is a process in which gas and water react to form solids, the generated hydrate needs to be decomposed again. Therefore, the degree of gas-water contact during the formation of gas hydrate directly affects the reaction speed, separation coefficient and efficiency. The current process improves the gas-water contact by means of spraying, atomization and bubbling, but this However, the effect of this macroscopic strengthening method is limited, so the industrial application of hydrate separation gas must overcome this problem

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  • A gas separation method and separation system based on porous material

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Embodiment 1

[0037] This embodiment provides a method for gas separation based on porous materials, which specifically includes the following steps:

[0038] Step A, providing a wet reaction channel filled with porous material, the pore size of the porous material is nanoscale, in this embodiment, the porous material is mesoporous material, further, the pore size of the mesoporous material is 5-50nm;

[0039] Step B. Lower the temperature or pressurize the mixed gas to be purified to ensure the rapid progress of the hydrate formation process. In this embodiment, pressurize to 0.5-1.0Mpa or lower the temperature to 5-10°C. The pressure and The temperature range can obtain a faster reaction rate;

[0040] Step C. Pass the pretreated mixed gas into the reaction channel, the gas to be separated in the mixed gas undergoes a hydration reaction with the water / water solution in the porous material to form hydrate, and the remaining gas is discharged. During this process, the The water content in ...

Embodiment 2

[0045] This embodiment is a separation system for gas drainage in a coal mine working face, and the gas to be separated is methane. Its structure is as figure 1 As shown, the reactor 6 is included, and the reactor 6 is filled with a medium material SBA-15 wetted by an aqueous solution, and its pore size is 7 nm. Add sodium lauryl sulfate with a concentration of 300ppm to the aqueous solution to enhance the surface activity of the solution, or add tetrahydrofuran with a molar ratio of 1:17 to reduce the reaction pressure.

[0046] The reactor 6 is provided with an air inlet 9 and an air outlet 10, the air inlet 9 is connected to the compressor 2 and the gas tank 1 in turn through the pipeline, the gas outlet 9 is connected to the reversing valve 7 through the pipeline, and the inlet port of the reversing valve 7 Connected to the gas outlet 9, the two outlets of the reversing valve 7 are respectively connected to the separation gas pipe 11 and the tail gas pipe 12, and the gas ...

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Abstract

The invention discloses a gas separation method and a separation system based on porous materials, relates to the technical field of mixed gas separation, and can solve the problems of discontinuous separation process, low separation coefficient, slow reaction speed and the like in the existing hydrate separation process. The gas separation method based on the porous material is to provide a wet reaction channel filled with a porous material, and the pore size of the porous material is nano-scale; the pretreated mixed gas is passed into the reaction channel, and the gas to be separated in the mixed gas is separated from the reaction channel. The water / aqueous solution in the porous material undergoes a hydration reaction to form hydrates, and the remaining gas is discharged, and the water content in the reaction channel is kept within a preset range; the hydrates in the reaction channel are decomposed to obtain the purified gas to be separated. At the same time, a separation system using the above method is proposed. The gas separation method based on the porous material provided by the invention can maximize the gas-water contact area, increase the hydrate formation rate, and simultaneously increase the gas separation coefficient.

Description

technical field [0001] The invention relates to the technical field of mixed gas separation, in particular to a porous material-based gas separation method and a separation system using the method. Background technique [0002] The purification and separation of mixed gas is still an engineering technical problem in this field. Using the difference in temperature and pressure conditions for the formation of gas hydrate by different gas components in the mixed gas, by controlling the reaction conditions, the mixed gas can be used in the process of forming gas hydrate The realization of separation and purification is hydrate separation technology. Relying on different temperature and pressure conditions for hydrate formation as a potential new separation technology is rapidly being paid attention to and deeply researched by colleagues. Gas hydrate separation technology is showing great potential in terms of physical feasibility and improving energy gas utilization, and this t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78
Inventor 赵建忠赵阳升梁海峰梁卫国
Owner TAIYUAN UNIV OF TECH
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