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Method for reducing carbon dioxide by aid of cathode which is graphene modified porous nickel in microbial fuel battery

A fuel cell, porous nickel technology, applied in biochemical fuel cells, fuel cells, fuel cell additives, etc., to achieve the effect of accelerating electron transfer efficiency and cathode reduction performance, improving system productivity, and improving cathode reduction product yield

Inactive Publication Date: 2016-07-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using waste water power generation technology, at room temperature, using the generated electricity to convert CO 2 Restoration, not yet reported

Method used

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  • Method for reducing carbon dioxide by aid of cathode which is graphene modified porous nickel in microbial fuel battery
  • Method for reducing carbon dioxide by aid of cathode which is graphene modified porous nickel in microbial fuel battery
  • Method for reducing carbon dioxide by aid of cathode which is graphene modified porous nickel in microbial fuel battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the dual-chamber bioelectricity system, graphite particles loaded with Shewanella are added to the anode, electrons are exported with a carbon rod, and an external 500Ω resistor is connected to the cathode through a wire. The cathode is placed with multi-layer flake porous nickel. separated by a proton exchange membrane, as attached figure 1 shown. The anolyte is added to the bacterial nutrient solution (C:N:P=100:5:1), and the catholyte is prepared with 0.5MKHCO 3 and 0.2MNa 2 SO 4 A total of 200mL. In the above case, continuous access to 0.1m 3 h -1 N 2 gas. After reacting for 6h, the product was analyzed by gas chromatography-mass spectrometry (GC-MS) to determine the HCO 3 - is reduced to ethanol, acetone is produced as a by-product, as attached figure 2 shown.

Embodiment 2

[0024] In the example 1 system, the reaction system constitutes the same, the N 2 Change to CO 2 Gas, keep the gas flow at 0.1m 3 h -1 , catholyte preparation 0.3MKHCO 3 and 0.2MNa 2 SO 4 A total of 200mL. After reacting for 6 hours, it was analyzed by GC-MS that the liquid phase products were ethanol and acetone, ethanol was the main product, and CO was produced in the gas phase products. Compared with the above process, some CO 2 Absorbed to form HCO 3 - , HCO 3 - While being further reduced to ethanol and acetone, some CO 2 is reduced to CO. At the same time, CO 2 The presence of promotes the production of ethanol and the like.

Embodiment 3

[0026] In the system of Example 2, the cathode and anode liquids remain unchanged, the composition of the reaction system remains unchanged, and the gas flow rate is changed to 0.02m 3 h -1 , After reacting for 6 hours, it was analyzed by GC-MS that the liquid phase products were ethanol and acetone, ethanol was the main product, and CO was produced in the gas phase products; at the same time, ethanol and acetone were generated from the liquid phase reaction products.

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Abstract

The invention belongs to the field of new energy, environmental protection and pollution control, and provides a method for reducing carbon dioxide by the aid of a cathode which is graphene modified porous nickel in a microbial fuel battery. The method has the advantages that HCO3<-> and the CO2 in cathode liquid are mainly reduced under the condition of power generation and supply of a biological anode to obtain ethyl alcohol; the biological anode is graphite particle loaded shewanella, the cathode is porous nickel or a reduced graphene modified porous nickel material, N2 and CO2 are introduced respectively to obtain cathode reduction products, the HCO3<-> in the cathode liquid is mainly reduced to obtain the ethyl alcohol when N2 is introduced to catholyte, and acetone is a byproduct; the HCO3<-> is reduced to obtain the ethyl alcohol when CO2 is introduced to catholyte, and a part of the CO2 is simultaneously reduced to obtain CO; the CO2 is beneficial to reduction reaction, and accordingly the reduction product generation rate and quantity can be increased; the electron transmission capacity of the cathode which is the porous nickel can be further enhanced after the cathode is modified by reduced graphene, the energy production efficiency of systems can be greatly enhanced, and the product conversion rate can be greatly increased.

Description

technical field [0001] The invention belongs to the fields of new energy, environmental protection and pollution control, and relates to converting CO 2 The reduction method under the action of bioelectricity, especially the use of porous nickel and graphene-functionalized porous nickel as the cathode to reduce CO 2 method of restoration. Background technique [0002] With the development of the global economy, the demand for energy is increasing, CO 2 As the final product of energy utilization, its emissions are increasing year by year. To mitigate the greenhouse effect, the CO 2 Recycling and transformation has become the focus of social attention at this stage. will CO 2 The reduction conversion methods are: photosynthesis, electrocatalytic reduction, photocatalytic reduction and CO 2 catalytic copolymerization, etc. Its products include: formic acid, methanol, formaldehyde and other small molecular organic compounds and CH 4 , CO, H 2 , O 2 Wait for gas. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04298H01M8/0668H01M8/16
CPCH01M8/04298H01M8/0668H01M8/16Y02E60/50Y02P70/50
Inventor 柳丽芬李益华杨凤林
Owner DALIAN UNIV OF TECH