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Method for synthesizing organic matter by catalytically reducing CO2 through MES biological cathode

A bio-cathode, microbial electrosynthesis technology, applied in the direction of electrolytic organic production, chemical/physical/physical-chemical processes of energy application, cells, etc., can solve the problems of requiring precious metal catalysts, high cost, high energy consumption, and achieve CO2 resource utilization problem solving effect

Inactive Publication Date: 2019-11-22
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

The invention overcomes the disadvantages of complex operating conditions, high energy consumption, need for noble metal catalysts and high cost in the prior art

Method used

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  • Method for synthesizing organic matter by catalytically reducing CO2 through MES biological cathode

Examples

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preparation example Construction

[0015] Preparation of anolyte and catholyte: anode chamber electrolyte: KH 2 PO 4 6.8g / L, NaOH 0.944g / L to adjust the pH of the electrolyte in the anode compartment to 6.0. Cathode chamber culture solution: K 2 HPO 4 2.18g / L, KH 2 PO 4 1.70g / L, NaHCO 3 2.50g / L, NH 4 Cl1.25g / L, KCl0.10g / L, MgCl 2 ·6H 2 O 1.00g / L, NaCl 0.80g / L, CaCl 2 2H 2 O 0.30g / L, L-cysteine ​​0.50g / L, trace element solution 10ml / L, vitamin solution 10ml / L, adjust the catholyte pH to 6.0.

[0016] Operation of the bioelectrochemical reactor: before the activated sludge is put into the reactor, it is placed in a dry place for anaerobic exposure to remove undesirable bacteria such as mold. Get 20mL of activated sludge and access the electrochemical reactor cathode, add 480mL liquid culture medium simultaneously, add the phosphate buffer (pH=6.0) of 500mL in the anode electrolysis chamber, by adding methane inhibitor (2- Sodium bromoethylsulfonate) to inhibit the activity of methanogens in sludge...

example 1

[0021] Example 1: In the microbial electrosynthesis system of the present invention, when the temperature of the cathode chamber of MES is controlled at 37°C and the cathode potential is controlled at -0.7Vvs.Ag / AgCl, the final accumulation of formic acid after 24h is 1.554mmol / L, The final accumulation of acetic acid was 2.754mmol / L.

example 2

[0022] Example 2: In the microbial electrosynthesis system of the present invention, when the temperature of the cathode chamber of MES is controlled at 37°C and the cathode potential is controlled at -0.8Vvs.Ag / AgCl, the final accumulation of formic acid after 24h is 1.467mmol / L, The final accumulation of acetic acid was 2.608mmol / L.

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Abstract

The invention provides a method for synthesizing an organic matter by catalytically reducing CO2 through an MES biological cathode. A biological cathode is prepared in a microbial electrosynthesis system, CO2 is introduced into a cathode chamber for cyclic aeration, and the polarization potential range is set to be -0.6 V to -1.0 V (vs.Ag / AgCl). Microorganisms Acetobacterium, Candida sp. S and Geobacter which are domesticated and cultured on the cathode can directly obtain electrons from the electrode or hydrogen generated by the electrode to reduce CO2 and synthesize organic matters. The rateof synthesizing organic matters by reducing CO2 is high, and the method has important application value for CO2 fixed conversion and synthesis of organic chemicals.

Description

technical field [0001] The invention belongs to CO 2 The technical field of resource utilization, with the use of microbial electrosynthesis system (MES) catalytic reduction of CO 2 Methods of synthesizing organic matter. Background technique [0002] With the rapid development of the global economy, energy and environmental issues have become increasingly severe, and resource issues have become an urgent problem for human beings to solve. which due to CO 2 The continuous accumulation in the atmosphere leads to the intensification of the greenhouse effect, making CO 2 Resource translation research becomes very meaningful. [0003] Reduction of CO by Microbial Electrosynthesis System 2 It is an electrochemical synthesis technology emerging in recent years, which is receiving more and more attention in the fields of environment and energy. It can use the combined effect of electrogenic microorganisms and electrochemical redox reactions to reduce CO 2 The thermodynamic e...

Claims

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Application Information

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IPC IPC(8): C25B3/04C25B9/00B01J19/08C25B3/25
CPCC25B9/00B01J19/08C25B3/25
Inventor 柳焜王黎鲁逸飞吴少奇
Owner WUHAN UNIV OF SCI & TECH
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