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Electrochemical method for synthesizing acidic hydrogen peroxide

A hydrogen peroxide, electrochemical technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc.

Inactive Publication Date: 2017-11-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a newly designed fuel cell reactor, and use the fuel cell reactor to realize on-line production of acidic hydrogen peroxide, so as to solve the problem of severe or easy pollution in the existing hydrogen peroxide production technology. characteristics such as explosion

Method used

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  • Electrochemical method for synthesizing acidic hydrogen peroxide
  • Electrochemical method for synthesizing acidic hydrogen peroxide
  • Electrochemical method for synthesizing acidic hydrogen peroxide

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Experimental program
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Effect test

Embodiment 1

[0035] Using BP2000 as the cathode catalyst, the catalyst loading is 2mg / cm 2 ; Pt / C is the anode catalyst, the catalyst loading is 0.6mg / cm 2 ;The loading capacity of PTFE in the carbon paper and the catalytic layer is 40% and 20% respectively; the operating temperature is 25°C, the graphite engraved with the flow field is the cathode and anode end plates, the anode hydrogen pressure is 0.1MPa, and the flow rate is 64mL / min ; The oxygen pressure into the cathode is 0.1MPa, the flow rate is 76mL / min; the electrolyte is 0.5M H 2 SO 4 Solution, electrolyte circulation, flow rate is 10mL / min. After the external circuit is closed, a voltage of 1.5V is applied to both ends of the reactor through a constant current power supply. Under this condition, the current density is 144mA / cm 2 , after electrolysis for 2h, the concentration of hydrogen peroxide was 4%.

Embodiment 2

[0037] Using BP2000 as the cathode catalyst, the catalyst loading is 2mg / cm 2 ; Pt / C is the anode catalyst, the catalyst loading is 0.6mg / cm 2 ;The loading capacity of PTFE in the carbon paper and the catalytic layer is 40% and 20% respectively; the operating temperature is 25°C, the graphite engraved with the flow field is the cathode and anode end plates, the anode hydrogen pressure is 0.1MPa, and the flow rate is 64mL / min ; The oxygen pressure into the cathode is 0.1MPa, the flow rate is 76mL / min; the electrolyte is 0.5mM H 2 SO 4 , electrolyte circulation, flow rate of 10mL / min. After the external circuit is closed, a voltage of 1.5V is applied to both ends of the reactor through a constant current power supply. Under this condition, the current density is 7mA / cm 2 , after electrolysis for 2h, the concentration of hydrogen peroxide was 0.034%.

Embodiment 3

[0039] Using BP2000 as the cathode catalyst, the catalyst loading is 2mg / cm 2 ; Pt / C is the anode catalyst, the catalyst loading is 0.6mg / cm 2 ;The loading capacity of PTFE in the carbon paper and the catalytic layer is 40% and 20% respectively; the operating temperature is 25°C, the graphite engraved with the flow field is the cathode and anode end plates, the anode hydrogen pressure is 0.1MPa, and the flow rate is 64mL / min ; The oxygen pressure into the cathode is 0.1MPa, the flow rate is 76mL / min; the electrolyte is 0.5M H 2 SO 4 Solution, electrolyte circulation, flow rate is 10mL / min. After the external circuit is closed, a voltage of 0.5V is applied to both ends of the reactor through a constant current power supply. Under this condition, the current density is 47mA / cm 2 , After electrolysis for 2h, the concentration of hydrogen peroxide was 1.89%.

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Abstract

The invention relates to an electrochemical method for synthesizing acidic hydrogen peroxide. According to the electrochemical method, hydrogen, oxygen and an acidic solution serve as raw materials, and an acidic hydrogen peroxide aqueous solution is prepared in an in-situ electro-catalytic mode through a fuel battery type reactor. In the fuel battery type reactor, the oxygen and the hydrogen enter a negative pole and a positive pole through gas inlets of a negative pole end plate and a positive pole end plate correspondingly and conduct an electrochemical reaction on a gas diffusion pole carrying an electro-catalyst, obtained products enter an electrolyte rapidly, and thus the hydrogen peroxide is easily enriched; a proton exchange film is arranged in the middle, so that the explosion risk of direct reaction of the hydrogen and the oxygen is avoided, safety is high, the reactor is small in size, and the products can be simply separated from reactants. By adopting the gas diffusion pole carrying the electro-catalyst, the three-phase reaction interface is effectively increased, the utilization rate of the catalyst is increased, the reaction rate is increased, and the overpotential and energy consumption of the reaction are effectively reduced.

Description

technical field [0001] The invention relates to an electrochemical method for synthesizing acidic hydrogen peroxide, and more specifically relates to a method for synthesizing hydrogen peroxide through a fuel cell type reaction device, which belongs to the fields of energy, catalysis, chemical industry, environmental protection and related fields. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) is a chemical agent with wide adaptability and various uses. It can be used as an oxidizing agent, bleaching agent, disinfectant, and dechlorination agent. It is widely used in various fields, including chemical industry (propylene oxide production process), Textile, paper, military, electronics, medicine, food, environmental protection and other industries; high-concentration hydrogen peroxide can be used as liquid high-energy fuel and oxygen source, and can also be used for synthetic resins and laser initiators. Hydrogen peroxide decomposition product is only H 2 O and...

Claims

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Application Information

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IPC IPC(8): C25B1/30C25B11/14C25B11/06C25B9/06C25B9/17
CPCC25B1/30C25B9/19C25B11/044C25B11/091
Inventor 俞红梅赵亚宋微迟军贾佳邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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