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A graphene-copper foam composite cathode to improve bioreduction of CO 2 Method for electrosynthesis of acetic acid

A composite cathode and N2-CO2 technology, applied in the field of bioelectrochemistry, can solve problems such as low probability of success and complicated process, and achieve the effects of low cost, environmental friendliness, and increased rate of acetic acid production

Active Publication Date: 2020-01-31
WUHAN UNIV OF TECH
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Problems solved by technology

The transfer mechanism of electrons from electrodes to cells involves genetic engineering. By introducing or changing a specific genome, this method requires professionals to design and repeat experiments countless times. The process is complicated and the probability of success is low.

Method used

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  • A graphene-copper foam composite cathode to improve bioreduction of CO <sub>2</sub> Method for electrosynthesis of acetic acid
  • A graphene-copper foam composite cathode to improve bioreduction of CO <sub>2</sub> Method for electrosynthesis of acetic acid
  • A graphene-copper foam composite cathode to improve bioreduction of CO <sub>2</sub> Method for electrosynthesis of acetic acid

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Embodiment 1

[0033]Enhanced bioreduction of CO using graphene-copper foam composite cathode 2 A method for electrosynthesizing acetic acid, comprising the steps of:

[0034] (1) Culture of microorganisms: the acetogenic bacterium Sporomusa ovata DSM 2662 preserved in the cryopreservation tube was stored in N 2 -CO 2 (80:20) atmosphere, activated in the 311 medium containing 40mM betaine; 2 -H 2 (20:80) expanded growth in 311 medium under atmosphere (without betaine);

[0035] (2) Construction of the double-chamber H-type electrolytic cell: the double-chamber H-type electrolytic cell includes an anode, an anode chamber, a cathode and a cathode chamber. The anode chamber and the cathode chamber are separated by a proton exchange membrane (nafion115). The anode is generally made of low-priced graphite Electrode, the cathode adopts graphene-copper foam composite cathode, inserts the reference electrode Ag / AgCl on the cathode side, and adds 311 culture medium in both the anode chamber and t...

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Abstract

The invention belongs to the field of bioelectrochemistry, and in particular relates to a method for improving biological reduction of CO by using a graphene-copper foam composite cathode. 2 Method for the electrosynthesis of acetic acid. The method comprises: 1) microbial cultivation; 2) constructing a double-chamber H-type electrolytic cell, wherein the cathode adopts a graphene-copper foam composite cathode, and microorganisms are inoculated into the cathode chamber of the double-chamber H-type electrolytic cell for cultivation, and the cathode The potential is ‑990mV vs SHE, and the anode chamber is continuously fed with N 2 ‑CO 2 (80:20) gas, the cathode chamber is initially continuously fed with N 2 ‑CO 2 -H 2 (83:10:7) gas, after 5-6 days of operation, continue to feed N 2 ‑CO 2 (80:20) gas, continue to run for 10 days; collect the bacterial liquid, and measure the acetic acid content. The invention provides a method for synthesizing acetic acid by MES using a graphene-copper foam composite material as a cathode, and the method has a higher rate of producing acetic acid.

Description

technical field [0001] The invention belongs to the field of bioelectrochemistry, and in particular relates to a method for improving the biological reduction of CO by using a graphene-copper foam composite cathode. 2 Method for the electrosynthesis of acetic acid. Background technique [0002] With the rapid development of the global economy, the greenhouse gas CO 2 The issue of emissions has drawn the attention of countries all over the world. On the other hand, CO 2 As the most abundant carbon resource in the world today, it is of great economic significance to convert it into high value-added products. The microbial electrosynthesis system (MES, microbial electrosynthesis system) can convert CO 2 Synthesis of a variety of high value-added products, such as methane, ethanol, formic acid, and acetic acid, has attracted extensive attention. The use of microorganisms to produce metabolites shows a very good application prospect because of its readily available raw mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/04C25B11/03C25B11/06C12P7/54C12R1/01C25B3/25
CPCC12P7/54C25B3/25C25B11/057C25B11/075C25B11/031C25B11/051
Inventor 张甜万露露皮埃尔鲁克·川柏雷
Owner WUHAN UNIV OF TECH
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