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Novel power supply method for electrocatalytic oxidation

A technology of electrocatalytic oxidation and power supply method, applied in the field of electrochemistry, can solve the problems of low current utilization efficiency, additional consumption of energy consumption, decreased current efficiency, etc., and achieve the effects of high current utilization efficiency, flexible use and low energy consumption

Active Publication Date: 2019-12-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the constant current mode (or pulse constant current mode, refers to the situation where the current value does not change and is only turned on or off for a fixed time) is used for degradation, assuming a given current density value i 0 is exactly the limiting current density value j corresponding to the initial organic matter concentration of the solution lim , then in the initial stage of the reaction, it belongs to the stage of high current efficiency (close to 100%); once the reaction is carried out for a period of time, the COD value of the solution will decrease with the reaction, which means that at a certain point in time after the start, its The limiting current density value j corresponding to the COD value of the solution lim ’ less than i 0 value, the reaction will enter the mass transfer control stage, and the current efficiency will drop (less than 100%)
From the perspective of current utilization efficiency, this is obviously unfavorable, and will cause additional consumption of energy consumption (increased oxygen evolution side reaction)
[0007] At present, the fundamental defect of electrocatalytic oxidation technology lies in the low efficiency of current utilization and high energy consumption for degradation. Solving this problem has become the top priority to promote the practical application of the technology

Method used

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  • Novel power supply method for electrocatalytic oxidation
  • Novel power supply method for electrocatalytic oxidation
  • Novel power supply method for electrocatalytic oxidation

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Experimental program
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Embodiment approach

[0047] A novel power supply method for electrocatalytic oxidation, comprising the following steps:

[0048] 1) Select the form of the current decay curve;

[0049] 2) Determine the initial current value, the termination current value, and the duration of each current decay curve in turn, and the current value at the junction of the two current decay curves matches the time value;

[0050] 3) Adopt the common constant current output form, simulate different current decay curve forms through the multi-segment unit time constant current output mode, and determine the current output unit time interval according to the parameters of the programmable DC power supply used and the actual situation of electrocatalytic degradation ;

[0051] 4) Determine the current and time input parameters of the programmable DC power supply according to the form of the current decay curve, the current value, the duration of the current decay curve, and the current output time interval;

[0052] 5) Co...

Embodiment 1

[0072] Porous Ti / PbO 2 The electrode is the core, and the acid red G (ARG) simulated dye wastewater is electrocatalytically oxidized and degraded, so that the current density decreases continuously in a simple linear decay type during the degradation process, and the influence of different initial current densities on the degradation effect under the same amount of electricity is analyzed. In actual operation, use the data calculation software to obtain the data parameters of the linear decay current-time output curve, and input them into the programmable DC power supply to supply power for the electrocatalytic degradation process.

[0073] The experimental conditions of this part: the initial concentration of ARG is 200mg / L, the dosage of NaCl is 0mol, and the initial values ​​of current density are 60, 50, 40, 30mA cm -2 , decreased linearly at different scan rates, and the current density decreased to 0, 10, 20, 30mA cm at 120min, respectively -2 , so that the entire elect...

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Abstract

The invention discloses a novel power supply method for electrocatalytic oxidation. The method comprises the following steps of: selecting a current attenuation curve form; sequentially determining aninitial current value and a final current value of each current attenuation curve and the duration of each current attenuation curve, wherein the current value at the joint of the two current attenuation curves is matched with the time value; adopting a common constant-current output mode, simulating different current attenuation curve modes through a multi-section unit time constant-current output mode, and determining the current output unit time interval according to programmable direct-current power supply parameters and the actual situation of electro-catalytic degradation; determining input parameters of the current and time of the programmable direct-current power supply according to the current attenuation curve form, the current value, the current attenuation curve duration and the current output time interval; and connecting an electrolytic cell with the programmable direct-current power supply, and carrying out electrocatalytic oxidative degradation according to the designed current attenuation curve form. The method is good in degradation effect, low in energy consumption, wide in application range and flexible to use.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a novel power supply method for electrocatalytic oxidation. Background technique [0002] Electrocatalytic oxidation treatment of organic matter is a typical advanced oxidation technology. In recent years, it has attracted the attention of many researchers and has been applied to a certain extent in engineering practice (Applied Catalysis B: Environmental, 2009, 87, 105-145; Chemical Society reviews, 2006, 35, 1324-1340; Chem. Rev., 2009, 109, 6541-6569). [0003] There are many factors that affect the effect of electrocatalytic oxidation technology, and different factors will have a greater impact on the final result, such as current density value, organic matter concentration, solution temperature, solution pH value, etc. Among them, the current density is an important index affecting the current efficiency and energy consumption value of the electrocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16C02F1/467C02F101/30
CPCC02F1/4672C02F2101/30H01M8/16Y02E60/50
Inventor 徐浩雷佳妮郭华李珊珊李美瑶唐卫华
Owner XI AN JIAOTONG UNIV