CN102034998A - Enhancing method of oxygen mass transfer efficiency of microbial fuel cell cathode and corresponding cell - Google Patents
Enhancing method of oxygen mass transfer efficiency of microbial fuel cell cathode and corresponding cell Download PDFInfo
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- CN102034998A CN102034998A CN2010105530858A CN201010553085A CN102034998A CN 102034998 A CN102034998 A CN 102034998A CN 2010105530858 A CN2010105530858 A CN 2010105530858A CN 201010553085 A CN201010553085 A CN 201010553085A CN 102034998 A CN102034998 A CN 102034998A
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Abstract
The invention discloses an enhancing method of oxygen mass transfer efficiency of a microbial fuel cell cathode, comprising the following steps: arranging a guiding mechanism in the cathode chamber of a fuel cell; arranging the cathode of the fuel cell in the guiding mechanism or reducing the size of the cathode chamber of the fuel cell to achieve the function of the guiding mechanism; and arranging an aeration mechanism below the guiding mechanism and feeding oxidant bubbles in bubble flow or slug flow into the guiding mechanism through the aeration mechanism. The invention also discloses a microbial fuel cell designed according to the method. Due to the guiding mechanism used in the cathode, the cathode aeration intensity is enhanced, the catholyte oxygen solubility is increased, and simultaneously the purposes of stirring the catholyte, increasing the catholyte circular flow and increasing the mass transfer rate of proton to the electrode are realized, thereby effectively enhancing the cathode reaction efficiency, ensuring the anaerobic condition of an anode chamber and increasing the electricity generating ability of the fuel cell.
Description
Technical field
The invention belongs to the microbiological fuel cell technical field, be specifically related to a kind of method that improves microorganism fuel cell cathode oxygen transfer efficient and according to the microbiological fuel cell of the raising negative electrode oxygen transfer efficient of this method design.The corresponding microorganism fuel cell of this method and design can strengthen catholyte flow disturbance mass transfer, improves cathode dissolution oxygen concentration and mass transfer ability, finally improves the microbiological fuel cell electricity generation ability.
Background technology
Fast development along with industry; energy resource consumption sharp increase, global main energy sources---fossil energy not only are faced with exhausted crisis, and it uses the environmental problem of being brought also to increasingly sharpen; therefore, efficiently, the research and development of the new forms of energy of cleaning, sustainable use have caused extensive concern.
Microbiological fuel cell is a kind of electrochemical appliance that utilizes microbiological oxidation chemical energy in the fuel to be converted into electric energy, though it has advantages such as peace and quiet, cleaning, environmental friendliness, reliability height, sustainable use, particularly when using sewage to do fuel, also can reach the effect of disposing of sewage, but electrogenesis efficient on the low side be the bottleneck of its application always.Therefore, the numerous in recent years scientific workers research of mainly being devoted to how to improve the fuel cell electricity generation ability.
With regard to dissolved oxygen aqueous solution air microbe fuel cell, existing document (Oh S.E.and Min B.E.Cathodeperformance as a factor in electricity generation in microbial fuel cells.Environ.Sci.Technol.2004,81 (3): 348～355) report, it is carried out the concentration that the negative electrode aeration helps to improve oxygen in water, thereby improve cathode reaction efficient, reach the purpose that improves the microbiological fuel cell electricity generation ability.But, to cross when low when dissolved oxygen concentration, the association rate of proton and oxygen is lower, thereby causes the raising of electricity generation ability limited; To cause the diffusion of dissolved oxygen anode so that destroy anode anaerobic condition, inhibition anode microbial growth and metabolism (Jeffrey J.F. and dissolved oxygen concentration is too high, Miriam R., Michael A.Cotta, Largyus T.A.Microbial Fuel Cell Performance with a PressurizedCathode Chamber.Environ.Sci.Technol.2008,42:8578～8584), reduce the battery electricity generation ability.
Summary of the invention
Primary and foremost purpose of the present invention is the negative electrode at existing dissolved oxygen aqueous solution microbiological fuel cell when carrying out aeration, and when the aeration flow was too small, oxygen in water concentration was low, electricity generation ability improves not remarkable; When the aeration flow was excessive, the diffusion of dissolved oxygen anode destroyed the anode anaerobic condition, electricity generation ability improves a series of problems such as also not remarkable, and a kind of method that improves microorganism fuel cell cathode oxygen transfer efficient is provided.
Another object of the present invention is the method according to above-mentioned raising microorganism fuel cell cathode oxygen transfer efficient, and design provides a kind of microbiological fuel cell that can improve negative electrode oxygen transfer efficient.
The method of raising microorganism fuel cell cathode oxygen transfer efficient provided by the invention, it is characterized in that this method is that a deflector is set in the cathode chamber of fuel cell, and make the cathode electrode of fuel cell be positioned at deflector, or the cathode chamber self of fuel cell dwindled possess the deflector function simultaneously, and aeration mechanism is positioned at the deflector below, and by feeding the oxidant bubble of bubble flow or slug flow in the guide stream mechanism of aeration mechanism, the oxidant bubble diameter that feeds is 50 μ m～10mm, preferred 2～10mm; Bobble rise velocity is controlled to be 0.14～23cm/s, preferred 12～23cm/s; The flow of oxidant is 0.01～60mL/ (mincm
2The cathode electrode area).
The used oxidant of said method is air or purity oxygen.Flow control is 0.1～60mL/ (mincm when oxidant is air
2The cathode electrode area), preferred 1～60mL/ (mincm
2The cathode electrode area); Flow is 0.01～10mL/ (mincm when oxidant is purity oxygen
2The cathode electrode area), preferred 0.1～10mL/ (mincm
2The cathode electrode area).
Method design according to above-mentioned raising microorganism fuel cell cathode oxygen transfer efficient provided by the invention provides a kind of microbiological fuel cell that can improve negative electrode oxygen transfer efficient, this battery comprises cathode chamber, the anode chamber, proton exchange membrane, cathode electrode, anode electrode and aeration mechanism, cathode electrode and anode electrode are suspended in cathode chamber respectively, in the anode chamber, proton exchange membrane is positioned at cathode chamber by fixing clamping plate, between the anode chamber, aeration mechanism is positioned at the cathode chamber bottom, it is characterized in that in cathode chamber, also being provided with a deflector, this deflector is supported by the extended leg in base and is positioned at aerator structure top, and makes the cathode electrode of fuel cell be positioned at this deflector.Perhaps its cathode chamber is designed to the rectangular cylinder that is anti-" L " shape of an open-top, cathode electrode is positioned at the vertical part of cathode chamber, proton exchange membrane is positioned at extension, cathode chamber bottom and joint, anode chamber, or its cathode chamber is designed to the rectangular cylinder of anti-" L " shape of being of a top seal, cathode electrode is positioned at the vertical part of cathode chamber, proton exchange membrane is positioned at extension, cathode chamber bottom and joint, anode chamber, is provided with a return duct between cathode chamber upper end sidewall and the extension, bottom.
Deflector in the microorganism fuel cell is guide shell or water conservancy diversion rectangle sheet frame, and the volume of its encirclement accounts for 10～70% of cathode chamber cumulative volume; The guide shell volume can improve dissolved oxygen concentration in the guide shell when big in a big way, and water conservancy diversion is simplified long-pendingly hour can be strengthened gas and propose effect, accelerates the circulation rate of the aqueous solution, improves the mass transfer ability.When deflector is guide shell, can be straight tubular, lower port and be trumpet-shaped straight tubular, upper port and be trumpet-shaped straight tubular or two-port and all be in the trumpet-shaped straight tubular any.And also can on the lower end barrel of straight tubular guide shell, open a rectangular through-hole for straight tubular guide shell wherein, or on water conservancy diversion rectangle sheet frame lower end wall, open a rectangular through-hole.
Cathode electrode in the microorganism fuel cell is any in column, sheet or the bullet shape.When cathode electrode is sheet, also it can be designed to compose in parallel, and each pellet electrode all has a water conservancy diversion rectangle sheet frame that matches outward by 2～5 pellet electrodes.
The present invention has following good effect:
1, since the inventive method not only proposed in the cathode chamber of fuel cell, to be provided with a deflector or the cathode chamber self of fuel cell dwindled into the cathode chamber that possesses the deflector function simultaneously, and also increased the flow of oxidant bubble diameter, bobble rise velocity and oxidant, thereby can effectively reduce the influence of dissolved oxygen antianode, can improve the reaction efficiency of negative electrode again, thereby improve the electricity generation ability of fuel cell.
2, because microbiological fuel cell provided by the invention has added deflector when target carries out aeration, thereby improved flow-shape in the catholyte, strengthen the flow turbulence of catholyte, make the liquid replacement around the cathode electrode speed up, to increase the catholyte dissolved oxygen concentration, strengthen the mass transfer of oxygen, improve the reaction efficiency of negative electrode, thereby improve the electricity generation ability of fuel cell to electrode surface.
Bubble size and throughput will directly influence the meltage of oxygen in water during 3, owing to aeration, thereby influence cathode reaction speed and battery electricity generation ability, the size and the frequency of bubble when therefore the present invention is by the control aeration, effectively improve disturbance, the enhancing mass transfer of catholyte, the booster action of deflector has further improved the state of disturbance of catholyte again in addition, formation is the gas stripping type of the circulation up and down fluidised form of central shaft with the deflector wall, has promoted the mass transfer of proton to electrode.
4, the deflector owing to the present invention's design is limited in dissolved oxygen in the deflector, thereby limited the diffusion of its anode, avoided prior art too high because of dissolved oxygen concentration, the dissolved oxygen anode diffusion that causes consequently destroys the anode anaerobic condition, suppresses anode microbial growth and metabolism, reduces the problem of battery electricity generation ability.
5, microbiological fuel cell design provided by the invention is ingenious, simple in structure, various informative, can meet the different needs.
Description of drawings
Fig. 1 is the perspective structure sketch of a kind of execution mode of microbiological fuel cell of the present invention;
Fig. 2 is the perspective structure sketch of the another kind of execution mode of microbiological fuel cell of the present invention;
Fig. 3 is second kind of construction profile figure of guide shell in the microbiological fuel cell of the present invention;
Fig. 4 is the third construction profile figure of guide shell in the microbiological fuel cell of the present invention;
Fig. 5 is the 4th kind of construction profile figure of guide shell in the microbiological fuel cell of the present invention;
Fig. 6 is the 5th kind of structure chart of guide shell in the microbiological fuel cell of the present invention;
Fig. 7 is the left TV structure figure of Fig. 6;
Fig. 8 is the perspective structure sketch of the third execution mode of microbiological fuel cell of the present invention;
Fig. 9 is the plan structure figure of Fig. 8;
Figure 10 is the perspective structure sketch of the 4th kind of execution mode of microbiological fuel cell of the present invention;
Figure 11 is the plan structure figure of Figure 10;
Figure 12 is the perspective structure sketch of the 5th kind of execution mode of microbiological fuel cell of the present invention;
Figure 13 is the perspective structure sketch of the 6th kind of execution mode of microbiological fuel cell of the present invention.
Figure 14 is the 5th kind of structure chart of guide shell in the microbiological fuel cell of the present invention;
Figure 15 is the left TV structure figure of Figure 14;
Embodiment
Provide embodiment and the present invention is specifically described below in conjunction with accompanying drawing; be necessary to be pointed out that at this following examples only are used for that the present invention is further described; can not be interpreted as limiting the scope of the invention; the person skilled in the art in this field makes some nonessential improvement and adjustment according to the invention described above content to the present invention, still belongs to protection range of the present invention.
As shown in Figure 1, the microbiological fuel cell that provides of present embodiment is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.
As shown in Figure 2, the microbiological fuel cell that provides of present embodiment also is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.
Present embodiment is to play the shape except that the shaped design of cathode electrode 4, and all the other are not stated so omit because of identical with embodiment 1.Is in order to make the bubble that rises along electrode wall to electrode souring be arranged with the shaped design of cathode electrode 4 for playing shape one, can clean attached on the electrode in conjunction with water layer or biomembrane, help the mass transfer of oxygen to electrode surface; The 2nd, be gathered in the turbulent flow tail district that the electrode upper end forms easily in order to make bubble, increase the proton time of staying herein, help fast reaction speed.
As shown in Figure 1, the microbiological fuel cell that provides of present embodiment also is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.The guide shell of deflector 8 is that lower port is trumpet-shaped straight tubular as different from Example 1, see Fig. 3, the toroidal guide shell can change the current streamline, resistance when reducing liquid circulation, improve the mass transfer rate of proton to electrode, make it be easier to react, thereby improve the reaction efficiency of negative electrode with oxidant and through the electronics that external circuit is transmitted to negative electrode.
As shown in Figure 2, the microbiological fuel cell that provides of present embodiment also is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.The guide shell of deflector 8 is that upper port is trumpet-shaped straight tubular as different from Example 2, see Fig. 4, the toroidal guide shell can change the current streamline, resistance when reducing liquid circulation, improve the mass transfer rate of proton to electrode, make it be easier to react, thereby improve the reaction efficiency of negative electrode with oxygen and through the electronics that external circuit is transmitted to negative electrode.
As shown in Figure 1, the microbiological fuel cell that provides of present embodiment also is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.The guide shell of deflector 8 is that two-port all is trumpet-shaped straight tubular as different from Example 1, see Fig. 5, two ends toroidal guide shell can change the current streamline better, resistance when reducing liquid circulation, improve the mass transfer rate of proton to electrode, make it be easier to react, thereby improve the reaction efficiency of negative electrode with oxygen and through the electronics that external circuit is transmitted to negative electrode.All the other are with embodiment 1.
As shown in Figure 1, the microbiological fuel cell that provides of present embodiment is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.The lower end barrel of the straight tubular guide shell of deflector 8 is opened a rectangular through-hole as different from Example 1, sees Fig. 6,7, to reduce the distance of proton to the electrode transmission, improves the reaction efficiency of negative electrode.All the other are with embodiment 1.
Shown in Fig. 8,9, the microbiological fuel cell that present embodiment provides is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5 and aeration mechanism 10.
Shown in Figure 10,11, the microbiological fuel cell that present embodiment provides is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5 and aeration mechanism 10.
As shown in figure 12, the microbiological fuel cell that provides of present embodiment is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.
Cathode electrode and anode electrode are sheet, and it is suspended in respectively in cathode chamber, the anode chamber, and link to each other with load by lead separately.Proton exchange membrane is passed through fixing clamping plate between cathode chamber, anode chamber, and parallel with anode electrode with the plate-like cathode electrode.The deflector present embodiment is a water conservancy diversion rectangle sheet frame, and supports the aeration mechanism top that is positioned at cathode chamber by the extended leg in base, and the plate-like cathode electrode that adopts materials such as carbon cloth, carbon felt to constitute is trapped among wherein.Because the plate-like cathode electrode has the big advantage of surface area, thereby can be according to the characteristics of plate-like cathode electrode, when making water conservancy diversion rectangle sheet frame spacing more less, to put forward effect more obvious for gas during aeration.Aeration mechanism present embodiment is an aeration tube, is positioned at water conservancy diversion rectangular slab frame bottom, and is purity oxygen by the bubble flow oxidant that it feeds in guide shell.
As shown in figure 13, the microbiological fuel cell that provides of present embodiment is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.
The cathode electrode 4 of present embodiment is to be composed in parallel by 2 pellet electrodes as different from Example 9, and each pellet electrode all has a water conservancy diversion rectangle sheet frame 8 that matches outward, each water conservancy diversion rectangle sheet frame 8 is all supported by the extended leg 9 in base and is positioned at cathode chamber 1, an aeration tube 10 is all arranged at each water conservancy diversion rectangle sheet frame 8 bottom, and the bubble flow oxidant that aeration tube 10 feeds in water conservancy diversion rectangular slab frame 8 is a purity oxygen.Present embodiment can further increase the surface area of cathode electrode 4, and increase cathode dissolution oxygen concentration, enhancing gas are proposed effect, accelerates the reaction rate of negative electrode thereby reinforcement material mass transfer combines with the increase electrode area.
As shown in figure 12, the microbiological fuel cell that provides of present embodiment is made up of cathode chamber 1, anode chamber 2, proton exchange membrane 3, cathode electrode 4, anode electrode 5, deflector 8 and aeration mechanism 10.Have a rectangular through-hole on water conservancy diversion rectangle sheet frame 8 lower end walls of deflector as different from Example 9, see Figure 14,15,, improve the reaction efficiency of negative electrode to reduce the distance of proton to the electrode transmission.All the other are with embodiment 9.
Embodiment 12
The fuel cell that present embodiment adopts embodiment 1 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 6～8mm; Bobble rise velocity is controlled to be 20～22.5cm/s; If employing air, the flow control of air are 57～60mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 9～10mL/ (mincm
2The cathode electrode area).
Embodiment 13
The fuel cell that present embodiment adopts embodiment 2 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 6～7mm; Bobble rise velocity is controlled to be 19～20cm/s; If employing air, the flow control of air are 38～41mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 5～7mL/ (mincm
2The cathode electrode area).
Embodiment 14
The fuel cell that present embodiment adopts embodiment 3 to provide, by feeding big roundlet burble bubble in the aeration mechanism guide stream tube, the diameter of minute bubbles is controlled to be 50～80 μ m, and the diameter of air pocket is controlled to be 8～10mm; The minute bubbles rate of climb is controlled to be 0.14～0.35cm/s, and the air pocket rate of climb is controlled to be 21.5～23cm/s; If employing air, the flow control of air are 24～26mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 4～6mL/ (mincm
2The cathode electrode area).
Embodiment 15
The fuel cell that present embodiment adopts embodiment 4 to provide, by feeding big roundlet burble bubble in the aeration mechanism guide stream tube, the diameter of minute bubbles is controlled to be 80～100 μ m, and the diameter of air pocket is controlled to be 7～9mm; The minute bubbles rate of climb is controlled to be 0.35～0.54cm/s, and the air pocket rate of climb is controlled to be 19.5～23cm/s; If employing air, the flow control of air are 10～13mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 1～2mL/ (mincm
2The cathode electrode area).
Embodiment 16
The fuel cell that present embodiment adopts embodiment 7 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 2～3mm; Bobble rise velocity is controlled to be 11～13.5cm/s; If employing air, the flow control of air are 19～21mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 1.8～2.4mL/ (mincm
2The cathode electrode area).
Embodiment 17
The fuel cell that present embodiment adopts embodiment 8 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 2～3mm; Bobble rise velocity is controlled to be 12.5～14cm/s; If employing air, the flow control of air are 29～31mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 3.5～4.5mL/ (mincm
2The cathode electrode area).
Embodiment 18
The fuel cell that present embodiment adopts embodiment 9 to provide, by feeding the slug flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 8～10mm; Bobble rise velocity is controlled to be 8～10cm/s; If employing air, the flow control of air are 12～15mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 1.2～1.5mL/ (mincm
2The cathode electrode area).
Embodiment 19
The fuel cell that present embodiment adopts embodiment 10 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 1～2mm; Bobble rise velocity is controlled to be 12～13cm/s; If employing air, the flow control of air are 18～20mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 2～3mL/ (mincm
2The cathode electrode area).
Embodiment 20
The fuel cell that present embodiment adopts embodiment 9 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 1～2mm; Bobble rise velocity is controlled to be 12.3～13.3cm/s; If employing air, the flow control of air are 15～16mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 0.8～2.1mL/ (mincm
2The cathode electrode area).
Embodiment 21
The fuel cell that present embodiment adopts embodiment 1 to provide, by feeding big roundlet burble bubble in the aeration mechanism guide stream tube, the diameter of minute bubbles is controlled to be 90～110 μ m, and the diameter of air pocket is controlled to be 6～8mm; The minute bubbles rate of climb is controlled to be 0.44～0.66cm/s, and the air pocket rate of climb is controlled to be 19～22cm/s; If employing air, the flow control of air are 0.1～1mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 0.01～0.1mL/ (mincm
2The cathode electrode area).
Embodiment 22
The fuel cell that present embodiment adopts embodiment 11 to provide, by feeding circle bubble shape bubble flow bubble in the aeration mechanism guide stream tube, the diameter of bubble is controlled to be 1～2mm; Bobble rise velocity is controlled to be 11.5～12cm/s; If employing air, the flow control of air are 9～11mL/ (mincm
2The cathode electrode area); If employing purity oxygen, the flow control of oxygen are 0.5～0.9mL/ (mincm
2The cathode electrode area).
Claims (10)
1. method that improves microorganism fuel cell cathode oxygen transfer efficient, it is characterized in that this method is that a deflector is set in the cathode chamber of fuel cell, and make the cathode electrode of fuel cell be positioned at deflector, or the cathode chamber self of fuel cell dwindled make it to possess the deflector function simultaneously, and aeration mechanism is positioned at the deflector below, and by feeding the oxidant bubble of bubble flow or slug flow in the guide stream mechanism of aeration mechanism, the oxidant bubble diameter that feeds is 50 μ m～10mm, bobble rise velocity is controlled to be 0.14～23cm/s, and the flow of oxidant is 0.01～60mL/ (mincm
2The cathode electrode area).
2. the method for raising microorganism fuel cell cathode oxygen transfer efficient according to claim 1, the oxidant bubble diameter that this method feeds is 2～10mm, bobble rise velocity is controlled to be 12～23cm/s.
3. the method for raising microorganism fuel cell cathode oxygen transfer efficient according to claim 1 and 2, the used oxidant of this method is air or purity oxygen, flow was 0.1～60mL/ (mincm when oxidant was air
2Flow was 0.01～10mL/ (mincm when the cathode electrode area), oxidant was purity oxygen
2The cathode electrode area).
4. the method for raising microorganism fuel cell cathode oxygen transfer efficient according to claim 1 and 2, flow was 1～60mL/ (mincm when the used oxidant of this method was air
2Flow was 0.1～10mL/ (mincm when the cathode electrode area), oxidant was purity oxygen
2The cathode electrode area).
5. microbiological fuel cell according to the raising negative electrode oxygen transfer efficient of the described method design of in the claim 1～4 each, this battery comprises cathode chamber, the anode chamber, proton exchange membrane, cathode electrode, anode electrode and aeration mechanism, cathode electrode and anode electrode are suspended in cathode chamber respectively, in the anode chamber, proton exchange membrane is positioned at cathode chamber by fixing clamping plate, between the anode chamber, aeration mechanism is positioned at the cathode chamber bottom, it is characterized in that in cathode chamber, also being provided with a deflector, this deflector is supported by the extended leg in base and is positioned at aerator structure top, and the cathode electrode that makes fuel cell is positioned at this deflector, or its cathode chamber is the rectangular cylinder that is anti-" L " shape of an open-top, cathode electrode is positioned at the vertical part of cathode chamber, proton exchange membrane is positioned at extension, cathode chamber bottom and joint, anode chamber, or its cathode chamber is the rectangular cylinder that is anti-" L " shape of a top seal, cathode electrode is positioned at the vertical part of cathode chamber, proton exchange membrane is positioned at extension, cathode chamber bottom and joint, anode chamber, is provided with a return duct between cathode chamber upper end sidewall and the extension, bottom.
6. the microbiological fuel cell of raising negative electrode oxygen transfer efficient according to claim 5 is characterized in that deflector is guide shell or water conservancy diversion rectangle sheet frame, and the volume that guide shell or water conservancy diversion rectangle sheet frame are surrounded accounts for 10～70% of cathode chamber cumulative volume.
7. the microbiological fuel cell of raising negative electrode oxygen transfer efficient according to claim 6 is characterized in that guide shell is that straight tubular, lower port are trumpet-shaped straight tubular, upper port and are trumpet-shaped straight tubular or two-port and all are in the trumpet-shaped straight tubular any.
8. the microbiological fuel cell of raising negative electrode oxygen transfer efficient according to claim 6 is characterized in that having a rectangular through-hole or have a rectangular through-hole on water conservancy diversion rectangle sheet frame lower end wall on the lower end barrel of straight tubular guide shell.
9. according to the microbiological fuel cell of claim 5 or 6 described raising negative electrode oxygen transfer efficient, it is characterized in that cathode electrode is any in column, sheet or the bullet shape.
10. the microbiological fuel cell of raising negative electrode oxygen transfer efficient according to claim 9 is characterized in that cathode electrode is composed in parallel by 2～5 pellet electrodes, and each pellet electrode all has a rectangle water conservancy diversion sheet frame that matches outward.
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| CN102800883A (en) * | 2012-08-15 | 2012-11-28 | 浙江大学 | Nitrification microbial fuel cell |
| CN105502631A (en) * | 2015-12-30 | 2016-04-20 | 哈尔滨工业大学 | Device and method for producing electricity by utilizing polyacrylamide solution specially used for oil field |
| CN105502631B (en) * | 2015-12-30 | 2018-01-30 | 哈尔滨工业大学 | A kind of apparatus and method using the polypropylene dedicated amide solution electricity production in oil field |
| CN106654329A (en) * | 2017-03-21 | 2017-05-10 | 重庆大学 | Self-circulation air cathode microbial fuel cell based on bubble buoyancy and method |
| CN106654329B (en) * | 2017-03-21 | 2019-01-22 | 重庆大学 | Self-circulation air cathode microbial fuel cell and method based on bubble floating lift |
| CN110320252A (en) * | 2019-04-26 | 2019-10-11 | 武汉理工大学 | A kind of oxygen transfer Resistance test methods of orderly electrode |
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| CN102034998B (en) | 2012-12-19 |
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