Method for catalytic regeneration of active carbon by nickel compound

An activated carbon and compound technology, applied in the field of regeneration of saturated organic activated carbon, can solve the problems of poor regeneration effect and harsh treatment conditions, and achieve the effects of short regeneration time, good quality and great economic benefits.

Active Publication Date: 2017-03-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the existing activated carbon regeneration needs to add a large amount of organic solvents, harsh treatment conditions, poor regeneration effect, etc., the present invention provides a method of using nickel-based substances as catalysts to regenerate activated carbon through hydrothermal reaction; aiming at reducing carbon Loss, improve the adsorption performance of activated carbon obtained by regeneration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]The regeneration method of activated carbon mainly includes the following steps:

[0043] Step (1): Wash the spent activated carbon with deionized water for 2 to 3 times to remove the acidic substances and some soluble inorganic substances in it, prevent side reactions with the catalyst from affecting the catalytic effect, filter and separate;

[0044] Step (2): The activated carbon obtained by filtering and separating step (1) is mixed with Ni with a mass ratio of 0.5% (based on activated carbon weight). 2 o 3 As a catalyst, mix it evenly with deionized water according to the liquid-solid ratio of 2:1, add it to the p-polyphenylene hydrothermal synthesis reaction kettle, heat it to 230 ° C, the air pressure is 28 atm, keep the temperature and pressure for 1 hour, and carry out organic Decomposition and stripping reaction, take out the slurry (hydrothermal reaction liquid) when cooled to below 50°C;

[0045] Step (3): Dilute the slurry obtained in step (2) with 5% dilu...

Embodiment 2

[0048] The regeneration method of activated carbon mainly includes the following steps:

[0049] Step (1): Wash the spent activated carbon with deionized water for 2 to 3 times to remove the acidic substances and some soluble inorganic substances in it, prevent side reactions with the catalyst from affecting the catalytic effect, filter and separate;

[0050] Step (2): The activated carbon obtained by filtering and separating step (1) is mixed with Ni with a mass ratio of 1% (based on activated carbon weight). 2 o 3 As a catalyst, mix it evenly with deionized water according to the liquid-solid ratio of 6:1, add it to the p-polyphenylene hydrothermal synthesis reaction kettle, heat it to 250 ° C, the air pressure is 40 atm, keep the temperature and pressure for 3 hours, and carry out organic Decomposition and stripping reaction, take out the slurry (hydrothermal reaction liquid) when cooled to below 50°C;

[0051] Step (3): Dilute the slurry obtained in step (2) with 5% dilu...

Embodiment 3

[0054] The regeneration method of activated carbon mainly includes the following steps:

[0055] Step (1): Wash the spent activated carbon with deionized water for 2 to 3 times to remove the acidic substances and some soluble inorganic substances in it, prevent side reactions with the catalyst from affecting the catalytic effect, filter and separate;

[0056] Step (2): The activated carbon obtained by step (1) is filtered and separated, and Ni is mixed with a mass ratio of 2% (based on activated carbon weight). 2 o 3 As a catalyst, mix it evenly with deionized water according to the liquid-solid ratio of 8:1, add it to the p-polyphenylene hydrothermal synthesis reactor, heat it to 260 ° C, the air pressure is 47 atm, keep the temperature and pressure for 3 hours, and carry out organic Decomposition and stripping reaction, take out the slurry (hydrothermal reaction liquid) when cooled to below 50°C;

[0057] Step (3): Dilute the slurry obtained in step (2) with 5% dilute hydr...

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Abstract

The invention discloses a method for catalytic regeneration of active carbon by a nickel compound. The method includes the steps of (1) dispersing the active carbon to be regenerated and a nickel catalyst into water so as to obtain thick liquid, and performing hydrothermal reaction at 230-280 DEG C and 28-64 atm, wherein the nickel catalyst is an elementary substance and / or oxide of nickel; (2) diluting a hydrothermal reaction solution obtained in the step (1) by acid liquor, and obtaining the regenerated active carbon after ultrasonic treatment, solid-liquid separation and drying treatment. The method is capable of decomposing macromolecules into micromolecular organic matter and even CO2 and water through the fast reaction between the superheated water and the organic matter adsorbed in the waste active carbon under the catalytic action of the nickel elementary substance or nickel compound, and realizing regeneration by cleaning residues in pores of the active carbon ultrasonically.

Description

technical field [0001] The invention belongs to the regeneration field of activated carbon saturated with adsorbed organic matter, and in particular relates to a method for regenerating activated carbon by using a nickel compound as a catalyst through hydrothermal reaction. Background technique [0002] Activated carbon regeneration refers to the process of removing the adsorbate adsorbed on the micropores of activated carbon by physical or chemical methods without destroying the original structure of activated carbon, and restoring its adsorption performance. At present, activated carbon regeneration methods mainly include ultrasonic regeneration method, electrochemical regeneration method, superfluid regeneration method, solvent regeneration method, oxidation regeneration method, thermal regeneration method, biological regeneration method, etc. Generally, the existing activated carbon regeneration methods have the following disadvantages: ①The loss of activated carbon is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20
CPCB01J20/20B01J20/34B01J20/3416B01J20/345
Inventor 肖劲余柏烈仲奇凡袁杰姚桢张留运
Owner CENT SOUTH UNIV
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