Reactor for gas-solid phase electro-catalytic reaction, and method for eliminating VOCs by using reactor

A catalytic reaction and electrocatalysis technology, applied in chemical instruments and methods, separation methods, chemical/physical/physical-chemical processes of applying energy, etc., can solve problems such as eliminating indoor volatile organic pollutants

Active Publication Date: 2017-05-31
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is no research on the use of electrocatalytic oxidation technology to eliminate indoor volatile organic pollutants

Method used

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  • Reactor for gas-solid phase electro-catalytic reaction, and method for eliminating VOCs by using reactor
  • Reactor for gas-solid phase electro-catalytic reaction, and method for eliminating VOCs by using reactor
  • Reactor for gas-solid phase electro-catalytic reaction, and method for eliminating VOCs by using reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A reactor for gas-solid phase electrocatalytic reactions, such as figure 1 shown. The electrolytic cell comprises an anode gas chamber 5, a cathode gas chamber 6, an electrocatalytic anode, a diaphragm and an electrocatalytic cathode, and both the electrocatalytic anode and the electrocatalytic cathode are breathable; the diaphragm is airtight, and protons can pass through the diaphragm;

[0070] The diaphragm is placed between the electrocatalytic anode and the electrocatalytic cathode, and the three form a whole to form an integrated structure 4; the integrated structure 4 is formed by placing the electrocatalytic anode, diaphragm and electrocatalytic cathode under a pressure of 2-10 kg Pressed to get;

[0071] The anode gas chamber 5 and the cathode gas chamber 6 are independently cavities provided with through holes, the integrated structure 4 is placed between the through holes of the anode gas chamber 5 and the through holes of the cathode gas chamber 6, and the a...

Embodiment 2

[0098] A Ti / Sb-SnO 2 A preparation method comprising the steps of:

[0099] (1) Use foamed titanium as the base, first soak the base with 20wt% NaOH solution at 80°C for 10min, remove surface oil; then boil with 10wt% oxalic acid solution for 3h, the surface of the foamed titanium etched by oxalic acid is gray and pockmarked, as Figure 2a ; Ultrasonic cleaning of oxalic acid and titanium oxalate on the surface of the titanium substrate with distilled water to obtain a pretreated foam Ti substrate;

[0100] (2) Electroplating Sn and Sb on the pretreated foam Ti substrate, the plating solution is: 1M SnCl 4 , 0.2M SbCl 3 and 0.1MHNO 3 The ethylene glycol solution, the Pt sheet is the anode, and the current is 15mA cm -2 , the electroplating time is 60min; then baked at 500°C for 30min to obtain SnO on the surface 2 and Sb 2 o 3 Ti substrate;

[0101] (3) SnO on the surface 2 and Sb 2 o 3 Slurry on the Ti substrate, slurry composition: 0.5M SnCl 4 , 0.02M SbCl 3 , 0...

Embodiment 3

[0105] A Ti / Sb-SnO 2 The preparation method, described preparation method except that step (4) is roasting at 500 ℃ after repeating step (3) 10 times, all the other are the same as embodiment 1. 7.7mgcm generated on Ti substrate -2 SnO 2 -Sb 2 o 3 The oxide layer is Ti / Sb-SnO 2 electrode.

[0106] For the obtained Ti / Sb-SnO 2 The electrode was tested by XRD and SEM, and the results are: the obtained oxide layer completely covers the foamed Ti substrate, and Sb enters the SnO 2 Lattice induced SnO 2 The diffraction peak is red-shifted; the obtained oxide layer is dense and crack-free, and is composed of nanoparticles, doped with SnO 2 The particle size is 1-10nm, such as 2nm, 5nm, 7nm or 9nm. After analysis, the doping elements include F and Sb, the ratio of the total molar weight of F and Sb to the molar weight of Sn is 0.04; the molar ratio of Sb and F is 10:1.

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Abstract

The invention provides a reactor for gas-solid phase electro-catalytic reaction, and a method for eliminating VOCs (volatile organic contaminants) by using the reactor. The reactor comprises an anode gas chamber, a cathode gas chamber, an electrocatalytic anode, a diaphragm and an electrocatalytic cathode, wherein both of the electrocatalytic anode and the electrocatalytic cathode are air-permeable; the diaphragm is placed between the electrocatalytic anode and the electrocatalytic cathode; the disphragm, the electrocatalytic anode and the electrocatalytic cathode form an integrated body, so as to form an integrated structure; the anode gas chamber and the cathode gas chamber are independently cavities with through holes; and the integrated structure is placed between the through hole of the anode gas chamber and the through hole of the cathode gas chamber, and covers the through hole of the anode gas chamber and the through hole of the cathode gas chamber. An electrolytic tank can eliminate the indoor VOCs at room temperature, and most of the products are CO2; in addition, the electrolytic tank for eliminating the indoor VOCs is safe, convenient and small in energy consumption, and oxidative degradation of the VOCs can be realized only by 2-V additional direct-current voltage.

Description

technical field [0001] The invention belongs to the technical field of electrolytic cells and purification of volatile organic pollutants, and relates to a reactor for gas-solid phase electrocatalytic reaction and a method for eliminating VOCs. Background technique [0002] Volatile organic compounds (VOCs) are the main gaseous pollutants in indoor air, including formaldehyde and benzene series. These pollutants are very harmful to human health and can cause disease, cancer or teratogenicity. On the market, the purification technologies for eliminating VOCs in indoor air mainly include physical adsorption, ozone oxidation, photocatalysis, thermal catalytic oxidation and plasma purification technologies. However, these technologies generally have the problems of high energy consumption, potential safety hazards and secondary pollution. [0003] Thermocatalytic oxidation has the advantage of simple operation and can degrade VOCs into non-toxic CO 2 and water. At present, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/08B01D53/32B01D53/86C25D3/30C25D3/54C25D3/50
CPCB01D53/32B01D53/86B01D2255/806B01D2256/22B01D2257/708B01D2258/06B01J19/08C25D3/30C25D3/50C25D3/54Y02A50/20
Inventor 贺泓张博张长斌王少莘
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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