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Method for stabilizing gas adsorption and desorption temperature by utilizing phase-change energy storage material

A phase change energy storage material and gas adsorption technology, applied in gas treatment, chemical instruments and methods, membrane technology, etc., can solve the problems of poor repeatability of adsorption operations, temperature rise, difficulty in regeneration of adsorbents, etc. Conducive to desorption and adsorbent regeneration, more efficient adsorption and desorption processes, and controllable adsorption and desorption processes

Inactive Publication Date: 2016-11-23
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of heat released during the gas adsorption process, the temperature in the adsorption column rises sharply (some can increase by more than 50 degrees), which not only reduces the adsorption capacity of the adsorbent, but also has the risk of fire and explosion of the adsorbent or oil gas.
In the vacuum desorption process, a lot of heat needs to be absorbed, which makes the temperature of the adsorption column drop sharply (some will drop by more than 70 degrees), making it more and more difficult for the gas to desorb from the adsorbent.
Difficulty in regeneration of adsorbent, resulting in poor repeatability of adsorption operation
The temperature fluctuates up and down, which is very unfavorable to the control of the overall adsorption and desorption operation.

Method used

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  • Method for stabilizing gas adsorption and desorption temperature by utilizing phase-change energy storage material
  • Method for stabilizing gas adsorption and desorption temperature by utilizing phase-change energy storage material
  • Method for stabilizing gas adsorption and desorption temperature by utilizing phase-change energy storage material

Examples

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Embodiment 1

[0019] Example 1 A method for stabilizing gas adsorption and desorption temperature using phase change energy storage materials

[0020] Conditions: The diameter of the adsorption column is 300mm, and the column height is 700mm;

[0021] The oil and gas to be adsorbed is C 1 -C 5 mixed gasoline vapor;

[0022] Inlet gas-air mixture flow rate is 5m 3 / h, the temperature and pressure are 20°C and 101.3kPa respectively, and the inlet oil and gas mass concentration is 322g / m 3 .

[0023] During the experiment, activated carbon was used as the adsorbent, and the maximum adsorption capacity was 453g / kg; the adsorbent and phase-change energy storage microcapsules were mixed at a mass ratio of 1:1, that is, 8kg of activated carbon and 8kg of phase-change energy storage microcapsules were mixed evenly and then filled into the adsorption column. Among them, the phase change energy storage microcapsule has a core-shell structure with calcium sulfate as the shell and paraffin as the...

Embodiment 2-6

[0028] Example 2-6 A method for stabilizing gas adsorption and desorption temperature using phase change energy storage materials

Embodiment 2

[0029] Example 2, the conditions are the same as in Example 1, using silica gel as the adsorbent, the maximum adsorption capacity is 298g / kg; the adsorbent and phase-change energy storage microcapsules are mixed in a mass ratio of 3:1, that is, 12kg of silica gel and 4kg of phase-change energy storage The energy microcapsules are mixed evenly and then filled into the adsorption column. The phase change energy storage microcapsules have a core-shell structure with aluminum as the shell and tetrahydrate and potassium fluoride as the core, with a diameter of 1.5mm.

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Abstract

The invention discloses a method for stabilizing a gas adsorption and desorption temperature by utilizing a phase-change energy storage material. A phase-change energy storage microcapsule and an adsorbent are uniformly mixed and are filled into an adsorption column, so as to adsorb volatile organic gas. The adsorption capability of the adsorbent is kept at a high level; and in a desorption process, the temperature in the column is also kept at a relatively high temperature and desorption and regeneration of the adsorbent are easy to realize. In the whole process, the temperature is relatively stable, and adsorption and desorption processes are more controllable; and the quality of discharged gas is stable and reaches the standards.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and specifically relates to a method for stabilizing the gas adsorption and desorption temperature by using a phase change energy storage material. Due to the adsorption and recovery of oil gas and volatile organic gas, it is mainly used in gas stations, factories for oil gas and volatile Recovery of non-toxic organic gases, and reduction of emissions to the ambient atmosphere. Background technique [0002] With the rapid development of the urban economy, the number of urban gas stations is increasing sharply. Oil and gas diffused in the gas stations will affect the safety of the gas stations and pollute the environment. changes in product quality. The waste gas emitted by spraying factories and other enterprises also contains high concentrations of volatile organic gases, mainly aromatic hydrocarbons, which are serious sources of pollution to the atmosphere. Therefore, the recovery...

Claims

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Application Information

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IPC IPC(8): B01D53/02
CPCB01D53/02B01D2259/40083
Inventor 李鑫钢苑巍隋红
Owner LIAONING UNIVERSITY
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