Adsorption stripping method for removing ethene and carbon dioxide from mixed gas

A mixed gas, adsorption separation technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problem of high cost and achieve the effect of large adsorption surface area

Inactive Publication Date: 2004-12-08
SICHUAN TIANYI SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is expensive because the sorbent is single-use and cannot be regenerated, and is usually limited to small packages

Method used

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  • Adsorption stripping method for removing ethene and carbon dioxide from mixed gas
  • Adsorption stripping method for removing ethene and carbon dioxide from mixed gas
  • Adsorption stripping method for removing ethene and carbon dioxide from mixed gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Composition and content of gas mixture: H 2 98.95%, C 2 h 4 0.05%, CO 2 1%.

[0039] 2. Composition and content of purified gas: H 2 99.994%, C 2 h 4 0.001%, CO 2 0.005%.

[0040] 3. Purified gas processing capacity: 300Nm 3 / h.

[0041] 4. Number of adsorption beds: 2.

[0042] 5. Adsorbent: activated alumina 10% + activated carbon 20% + fine-pore silica gel 70%.

[0043] 6. Process steps: adsorption, reverse pressure release, flushing, boosting.

[0044] 7. Adsorbent regeneration method: reflux purification gas flushing. Flushing absolute pressure: 0.12MPa.

[0045] 8. Adsorption absolute pressure: 0.15MPa.

Embodiment 2

[0047] 1. Composition and content of gas mixture: H 2 94.99%, C 2 h 4 0.01%, CO 2 5%.

[0048] 2. Composition and content of purified gas: H 2 99.984%, C 2 h 4 0.001%, CO 2 0.015%.

[0049] 3. Purified gas processing capacity: 500Nm 3 / h.

[0050] 4. Number of adsorption beds: 2.

[0051] 5. Adsorbent: activated alumina 10% + activated carbon 90%.

[0052] 6. Process steps: adsorption, reverse pressure release, evacuation, and boost.

[0053] 7. Adsorbent regeneration method: vacuum pump to evacuate. Evacuation absolute pressure: 0.007MPa.

[0054] 8. Adsorption absolute pressure: 0.3MPa.

Embodiment 3

[0056] 1. Composition and content of gas mixture: N 2 89%, C 2 h 4 1%, CO 2 10%.

[0057] 2. Composition and content of purified gas: N 2 99.695%, C 2 h 4 0.005%, CO 2 0.3%.

[0058] 3. Purified gas processing capacity: 300Nm 3 / h.

[0059] 4. Number of adsorption beds: 2.

[0060] 5. Adsorbent: activated alumina 10% + activated carbon 90%.

[0061] 6. Process steps: adsorption, reverse pressure release, evacuation, and boost.

[0062] 7. Adsorbent regeneration method: vacuum pump to evacuate. Evacuation absolute pressure: 0.01MPa.

[0063] 8. Adsorption absolute pressure: 0.4MPa.

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Abstract

An adsorptive separation method for removing ethylene and CO2 from the gas mixture features that in a pressure-varying adsorption system composed of at least two adsorption beds filled by adsorbent chosen from activated carbon, aluminium oxide, silica gel and molecular sieve, easy cycle of adsorption bed includes sequentially such steps as adsorption and at least one lowering of pressure, reversely releasing pressure, vacuumizing or flushing, or at least one increasing of pressure.

Description

technical field [0001] The present invention relates to methods for separating gases. Especially the method of removing ethylene and carbon dioxide from mixed gas by pressure swing adsorption. Background technique [0002] The method of removing ethylene from the mixed gas, especially the mixed gas of the controlled atmosphere fresh-keeping store, mainly adopts the catalytic oxidation method at present. The catalytic oxidation method is to use the noble metal oxidation catalyst to catalytically oxidize (combust) the ethylene in the nitrogen gas into carbon dioxide and carbon dioxide at high temperature. Water, reduce the concentration of ethylene in the air of the air-conditioned fresh-keeping store to ensure the normal operation of the air-conditioned fresh-keeping store. The method is to catalytically oxidize (combust) ethylene in nitrogen into carbon dioxide and water through an oxidation catalyst at a temperature of ~200°C or higher in the exhaust gas of the controlled ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/047
Inventor 冯孝庭刘丽刘照利郜豫川张剑锋
Owner SICHUAN TIANYI SCI & TECH
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