CN106917104A - A kind of method of use BDD electrodes electro synthesis persulfate - Google Patents
A kind of method of use BDD electrodes electro synthesis persulfate Download PDFInfo
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- CN106917104A CN106917104A CN201710176058.5A CN201710176058A CN106917104A CN 106917104 A CN106917104 A CN 106917104A CN 201710176058 A CN201710176058 A CN 201710176058A CN 106917104 A CN106917104 A CN 106917104A
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- persulfate
- sulfuric acid
- electrode
- bdd electrodes
- current density
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/28—Per-compounds
- C25B1/29—Persulfates
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The present invention relates to a kind of method of utilization BDD electrodes electro synthesis persulfate.The method with BDD as electrode as anode, zirconium electrode as negative electrode and cation-exchange membrane composition electrolytic cell, separate anode chamber and cathode chamber forms recycle stream in the presence of pump, is electrolyte with 2 5M sulfuric acid, current density be 5 100mA/cm2, temperature is the system of structure under conditions of 9 20 DEG C.The method is higher compared to the persulfate concentration of other electro synthesis methods synthesis, and current efficiency is also higher, realizes product persulfate in situ.
Description
Technical field
The invention belongs to field of environment engineering technology, it is related to a kind of method of use BDD electrodes electro synthesis persulfate.
Background technology
Persulfate S2O8 2-Due to having been obtained extensively in chemistry, weaving, electronics, oil and field of food containing active oxygen
General application, is such as used as initiator, ripener and bleaching agent.The production common method of persulfate is electrolysis.It is generally sharp
With platinum electrode or the Ti electrode of platinum plating higher than 500mA/cm2Current density under be electrolysed sulfate radical generation, but such method
The side reaction for being often accompanied by water oxygen is produced and reduces current efficiency while the dissolution of platinum electrode can be caused to introduce secondary pollution.This
The difficulty that the unstability of outer persulfate will also result in transport limits its application.Therefore a kind of more efficient electro synthesis are sought
S2O8 2-Method has the very big market demand.
S2O8 2-Synthesis be anodic oxidation process, therefore the selection of anode material is most important.BDD electrodes Yin Qigao
Oxygen evolution potential, the advantage of low background current and preferable chemical stability and low absorbability up to 3V and in Environmental electrochemistry field
It is widely used, such as the negative electrode of heavy metal is reclaimed, biology sensor and electrochemical analysis measure etc., but mainly for the treatment of in waste water
Organic pollution.Compared to metal electrode, BDD electrodes are more easy to realize under low current density due to the characteristic of oxygen evolution potential
Electrosynthesis glyoxal S2O8 2-, therefore with good application prospect.Further, since anodic oxidation sulfuric acid generation persulfuric acid is heat release
Process, this easily causes the S of thermally labile2O8 2-Decompose and reduce current efficiency, traditional monopole room reactor sulfate radical turns
Change efficiency only less than 5%.
The content of the invention
Based on this, the purpose of the present invention is by the bar in separate anode chamber and the temperature of cathode chamber and control anode chamber
Using BDD electrolysis sulfuric acid electro synthesis persulfates S under part2O8 2-, to realize the raising of current efficiency.
The present invention produces S2O8 2-Method it is as follows：With BDD electrodes as anode, zirconium electrode be negative electrode cation-exchange membrane
The device for separating composition is electrolytic cell, and anode chamber and cathode chamber are the sulfuric acid of the 2-5M of same concentration, and rate of circulating flow is 120-
300L/h, control electric current density is 5-100mA/cm2, temperature is electrosynthesis glyoxal at 9-20 DEG C.
The present invention has following outstanding feature and beneficial effect：
(1) the method can prevent S under conditions of separate anode chamber and cathode chamber and temperature control2O8 2-Because of electrolysis heat release
Decompose.
(2) the method can be electrolysed sulfuric acid under relatively low current density and produce S2O8 2-。
(3) the method improves 2 times to the oxidation efficiency of sulfate radical compared with conventional method.
Brief description of the drawings
Fig. 1 is the S of generation under different current densities2O8 2-Amount.
Fig. 2 is the current efficiency under different current densities.
Specific embodiment
The present invention is described in further detail by following examples combination accompanying drawing.
(1) method of the present invention processing procedure
With BDD electrodes (a diameter of 10cm) as anode, zirconium electrode (a diameter of 10cm) is negative electrode, cation-exchange membrane composition
The sulfuric acid concentration of electrolytic cell, anode chamber and cathode chamber is 2M, and rate of circulating flow is 200L/h, the temperature of control anode and cathode chamber
It is 9 DEG C, is 5-100mA/cm in current density2, it is electrolysed 300min.
(2) embodiment obtains effect
It is electrolysed under the different current density conditions of the examples comparative and produces S2O8 2-Amount, as shown in figure 1, as electric current is close
The increase of degree, S2O8 2-Content also increase.When current density is 5mA/cm2When, it is electrolysed 300min, the S of generation2O8 2-Amount
It is 0.028M, and works as current density for 100mA/cm2When, it is electrolysed 300min, the S of generation2O8 2-Amount be 0.26M.This and industry
Upper high current density (500mA/cm2) compare, greatly reduce industrial cost.
Fig. 2 compared for the current efficiency under different current density conditions.As the increase current efficiency of current density is presented
Downward trend.When current density is 5mA/cm2When, current efficiency is up to 83%, and working as current density increases to 100mA/cm2
When, current efficiency is reduced to 35%.
Claims (3)
1. a kind of method of utilization BDD electrodes electro synthesis persulfate, the method is as follows：With BDD electrodes as anode, zirconium electrode be
The sulfuric acid solution of same concentrations, is respectively placed in separate anode and cathode chamber by negative electrode and cation-exchange membrane composition electrolytic cell,
Sulfuric acid rate of circulating flow is 120-300L/h, and under controlled temperature conditions, current density is 5-100mA/cm2Electrolysis.
2. method according to claim 1, it is characterised in that the sulfuric acid concentration is 2-5M.
3. method according to claim 1, it is characterised in that the temperature is 9-20 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176058.5A CN106917104A (en) | 2017-03-17 | 2017-03-17 | A kind of method of use BDD electrodes electro synthesis persulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176058.5A CN106917104A (en) | 2017-03-17 | 2017-03-17 | A kind of method of use BDD electrodes electro synthesis persulfate |
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| Publication Number | Publication Date |
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| CN106917104A true CN106917104A (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710176058.5A Pending CN106917104A (en) | 2017-03-17 | 2017-03-17 | A kind of method of use BDD electrodes electro synthesis persulfate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110902776A (en) * | 2019-11-23 | 2020-03-24 | 同济大学 | Method for generating sulfate radical free radical oxidation pollutants through in-situ electrocatalysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001192874A (en) * | 1999-12-28 | 2001-07-17 | Permelec Electrode Ltd | Method for preparing persulfuric acid-dissolving water |
| CN103380232A (en) * | 2010-12-21 | 2013-10-30 | 氯工程公司 | Electrically conductive diamond electrode, and sulfuric acid electrolysis method and sulfuric acid electrolysis apparatus each utilizing same |
| CN103384731A (en) * | 2011-02-28 | 2013-11-06 | 栗田工业株式会社 | Sulfuric acid electrolysis method and sulfuric acid electrolysis device |
| CN103518007A (en) * | 2011-03-08 | 2014-01-15 | 氯工程公司 | Apparatus for electrolyzing sulfuric acid and method for electrolyzing sulfuric acid |
-
2017
- 2017-03-17 CN CN201710176058.5A patent/CN106917104A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001192874A (en) * | 1999-12-28 | 2001-07-17 | Permelec Electrode Ltd | Method for preparing persulfuric acid-dissolving water |
| CN103380232A (en) * | 2010-12-21 | 2013-10-30 | 氯工程公司 | Electrically conductive diamond electrode, and sulfuric acid electrolysis method and sulfuric acid electrolysis apparatus each utilizing same |
| CN103384731A (en) * | 2011-02-28 | 2013-11-06 | 栗田工业株式会社 | Sulfuric acid electrolysis method and sulfuric acid electrolysis device |
| CN103518007A (en) * | 2011-03-08 | 2014-01-15 | 氯工程公司 | Apparatus for electrolyzing sulfuric acid and method for electrolyzing sulfuric acid |
Non-Patent Citations (2)
| Title |
|---|
| P-A. MICHAUD 等: "Electrochemical oxidation of water on synthetic boron-doped diamond thin film anodes", 《JOURNAL OF APPLIED ELECTROCHEMISTRY》 * |
| SUBRAMANIAN BALAJI 等: "Influence of cathode on the electro-generation of peroxydisulfuric acid oxidant and its application for effective removal of SO2 by room temperature electro-scrubbing process", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110902776A (en) * | 2019-11-23 | 2020-03-24 | 同济大学 | Method for generating sulfate radical free radical oxidation pollutants through in-situ electrocatalysis |
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Application publication date: 20170704 |
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