A self-sustained synergistic reaction tank for photocatalysis conversion of pollutants and CO2 and a preparing method thereof

A technology of synergistic reaction and pollutants, applied in the direction of ion exchange water/sewage treatment, sterilization/microdynamic water/sewage treatment, energy wastewater treatment, etc., can solve the problems of imperfection, consumption of additional energy, high operating cost, etc., to achieve Eliminate the impact on the environment, promote conversion and power generation, and have a large effect on environmental pollution

Inactive Publication Date: 2015-05-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current photocatalytic conversion of CO 2 The report on the coupling technology with photocatalytic degradation of organic pollutants is very incomplete, and an external bias voltage is still required to promote t

Method used

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  • A self-sustained synergistic reaction tank for photocatalysis conversion of pollutants and CO2 and a preparing method thereof
  • A self-sustained synergistic reaction tank for photocatalysis conversion of pollutants and CO2 and a preparing method thereof
  • A self-sustained synergistic reaction tank for photocatalysis conversion of pollutants and CO2 and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] Use TiO with a tube diameter of 10-30 nm and a tube length of 20-30 μm 2 The nanoarray tube is a photoelectric catalytic material and acts as an anode. It is placed obliquely into a phenol solution with a concentration of 0.1~5 mol / L to form an anode chamber. The inclination angle between the array tube and the horizontal plane is 50~60°, and NaOH is added to the anode chamber Adjust the pH value of the solution, use Nafion117 cation exchange membrane for the diaphragm, and add saturated Na in the cathode compartment 2 CO 3 Solution, copper mesh as cathode, anode TiO 2 The distance between the array tube and the cathode copper mesh is less than 30 cm, and the CO 2 Approach the cathode through the gas distribution plate, add a certain amount of 500 ~ 3000 m 2 / g of pore carbon enhanced CO 2 The absorption and dissolution of TiO2, the two chambers are stirred to strengthen the transfer process, and the anode TiO 2 The array tube is connected with the cathod...

Example Embodiment

[0024] Example 2

[0025] The MoS with a particle size of 5-20 nm 2 The powder is supported on the porous molecular sieve Ti-MCM-41, and placed in a titanium basket with one side of quartz glass to act as a photocatalyst and anode, and placed obliquely into the printing and dyeing waste liquid to form the anode chamber. The quartz glass surface of the titanium basket is The inclination of the horizontal plane is 10~60°. CaO is added to the anode chamber to adjust the pH value of the solution to be greater than 9, the diaphragm is an anion exchange membrane, seawater is added to the cathode chamber, and the graphite felt loaded with Fe nano-GaP is used as the cathode. 2 Pass into the bottom of the cathode chamber, add 1000 ~ 2000 m 2 / g of pore carbon enhanced CO 2 The anode titanium basket and the cathode graphite felt are connected with a wire to form an external circuit. The anode and cathode are separated by less than 50 cm. The load is a small fan. The anode chamber is oxidize...

Example Embodiment

[0026] Example 3

[0027] To the above Example 2 100 ~ 200 W simulated sunlight accelerates CO 2 Conversions, such as image 3 As shown, the cathode chamber is added with an appropriate amount of NH 3 ·H 2 O consumes the photo-generated holes generated in the chamber, reduces the recombination of photo-generated holes and electrons, and strengthens CO 2 Electrode's electronic acceptance, electroplating wastewater is used to replace the printing and dyeing waste liquid in the anode chamber, and the others remain unchanged. After adjusting the composition, concentration and pH value of the solutions on both sides, the product composition of the cathode chamber can be changed, which is formed by methane, CO, methanol, and formaldehyde.

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Abstract

The invention relates to a self-sustained synergistic reaction tank for continuous photocatalysis conversion of pollutants and CO2 and a preparing method thereof, and belongs to the fields of environment protection, new energy and related fields. According to the reaction tank and the method, waste is treated and CO2 is converted synergistically by solar energy to generate electricity and prepare high-value chemical products. The technical problem to be overcome by the reaction tank and the method is to convert CO2 and pollutants only by solar energy and to improve social and economic benefit for pollutant treatment. According to a technical scheme, a photo-anode is adopted to oxidize and degrade the pollutants in an anode chamber, electrons generated in the oxidation process are utilized to promote CO2 conversion in a cathode chamber, the anode chamber and the cathode chamber are separated by a separating membrane, and the chemical potential difference between the two chambers is adjusted by controlling solutions in the anode chamber and the cathode chamber to allow the potential difference to make up insufficient of photovoltage and to meet energy requirements for running of the synergistic reaction tank, thus achieving self-sustained continuous running. According to the synergistic reaction tank and the method, the photocatalytic reaction efficiency in the anode chamber is high, the structure is simple, operability is high, and the synergistic reaction tank and the method are suitable for occasions where pollutants and CO2 are subjected to light coupling treatment for a long term.

Description

technical field [0001] The invention discloses a novel self-sustaining photocatalytic conversion of pollutants and CO 2 The synergistic reaction pool and its preparation method utilize clean solar energy alone to dispose of waste and synergistically generate electricity and produce high-value-added chemical products without additional energy, and belong to the fields of environmental protection, new energy and related fields. Background technique [0002] Greenhouse gas CO 2 The organic pollutants in sewage and sewage seriously threaten the survival and reproduction of human beings and the sustainable development of social economy, and even cause extreme climate phenomena, which has attracted great attention from all countries in the world. Many industrial processes (such as: printing and dyeing, photography, pesticides, explosives, disinfectants, lubricants, petrochemicals, rubber, plastics, etc.) will produce a large amount of waste liquid containing phenols, and toxic ...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/42
CPCY02W10/37
Inventor 王贵欣闫康平钟宜霏薛娱静
Owner SICHUAN UNIV
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