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Method for preparing carbon monoxide by electrochemically oxidizing graphite

A carbon monoxide and electrochemical technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high technical difficulty, difficult engineering application, difficult control of the reaction process, etc., to achieve process safety, simple and easy method, energy consumption low effect

Active Publication Date: 2021-10-26
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steam pyrolysis treatment of stacked graphite has a significant volume reduction effect, but the reaction process is not easy to control, the technology is difficult, and the engineering application is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Use a tablet press to press YSZ powder into 8×8cm 2 1. A square piece with a thickness of 200 μm, heat-treated at 1500 ° C for 20 hours, as a ceramic membrane electrolytic cell support and electrolyte;

[0066] (2) Mix TCNO and SDC according to the mass ratio of 65:35 and add 20wt% ethyl cellulose and a certain amount of turpentine through alcohol (add 1 mL of turpentine through alcohol for every 2 g of the mixed mass of TCNO and SDC), mix and grind for 3 hours to make TCNO-SDC slurry;

[0067] (3) The TCNO-SDC slurry was coated on both sides of the electrolyte by casting technology, and the YSZ electrolyte-supported integrated symmetrical ceramic membrane battery TCNO|YSZ|TCNO green embryo was prepared;

[0068] (4) heat-treat the green body of the ceramic membrane electrolytic cell at 1100°C for 3 hours; then coat silver paste for the current collector layer on both sides, and use silver wires as wires, and heat-treat at 550°C for 0.5 hour to obtain a ceramic mem...

Embodiment 2

[0075] (1) Use a tablet press to press YSZ powder into 8×8cm 2 1. A square piece with a thickness of 200 μm, heat-treated at 1500 ° C for 20 hours, as a ceramic membrane electrolytic cell support and electrolyte;

[0076] (2) Mix TCNO and SDC according to the mass ratio of 65:35 and add 20wt% ethyl cellulose and a certain amount of turpentine through alcohol (3mL turpentine through alcohol is added to every 2g of the mixed mass of TCNO and SDC), mix and grind for 3 hours to make TCNO-SDC slurry;

[0077] (3) The TCNO-SDC slurry was coated on both sides of the electrolyte by casting technology, and the YSZ electrolyte-supported integrated symmetrical ceramic membrane battery TCNO|YSZ|TCNO green embryo was prepared;

[0078] (4) heat-treat the green body of the ceramic membrane electrolytic cell at 1100°C for 3 hours; then coat current collector layers on both sides, and use silver wires as wires, and heat-treat at 550°C for 0.5 hour to obtain a ceramic membrane battery.

[00...

Embodiment 3

[0085] (1) Use a tablet press to press YSZ powder into 8×8cm 2 1. A square piece with a thickness of 200 μm, heat-treated at 1500 ° C for 20 hours, as a ceramic membrane electrolytic cell support and electrolyte;

[0086] (2) Mix TCNO and SDC according to the mass ratio of 65:35 and add 20wt% ethyl cellulose and a certain amount of turpentine through alcohol (add 1 mL of turpentine through alcohol for every 2 g of the mixed mass of TCNO and SDC), mix and grind for 3 hours to make TCNO-SDC slurry;

[0087] (3) The TCNO-SDC slurry was coated on both sides of the electrolyte by casting technology, and the YSZ electrolyte-supported integrated symmetrical ceramic membrane battery TCNO|YSZ|TCNO green embryo was prepared;

[0088] (4) heat-treat the green body of the ceramic membrane electrolytic cell at 1100°C for 3 hours; then coat current collector layers on both sides, and use silver wires as wires, and heat-treat at 550°C for 0.5 hour to obtain a ceramic membrane battery.

[0...

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Abstract

The invention discloses a method for preparing carbon monoxide by electrochemically oxidizing graphite. The method comprises the following steps: applying voltage between a cathode and an anode of a ceramic membrane electrolytic tank to electrolyze oxygen-containing gas at the cathode of the ceramic membrane electrolytic tank to obtain oxygen ions, and transmitting the oxygen ions to the anode of the ceramic membrane electrolytic tank through the electrolyte of the ceramic membrane electrolytic tank; and oxidizing graphite at the anode of the ceramic membrane electrolytic tank to obtain gas containing carbon monoxide. The reactor irradiation graphite gasification rate is high, the reactor irradiation graphite gasification is carried out in a closed system, the reaction is easy to control, and innovativeness and social and economic benefits are achieved for treatment of retired reactor irradiation graphite.

Description

technical field [0001] The invention relates to the technical field of stacking radioactive graphite treatment, in particular to a method for producing carbon monoxide by electrochemical oxidation of stacked graphite in a ceramic membrane electrolytic cell. Background technique [0002] As a structural material for reactors, graphite is mainly used as a neutron moderator and reflector. It is widely used in more than 100 nuclear power plants, experimental reactors, and material test reactors in the world. With the decommissioning of some research reactors and production reactors , a large amount of heaped graphite needs to solve the problem of whereabouts. At this stage, the treatment method for decommissioned reactor graphite is to store it for decades after the reactor is closed. However, long-term storage has certain negative effects and uncertainties, such as long-term dependence on economic and social stability, storage buildings are easily invaded by accident, and stil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/23C25B11/036C25B11/04C25B15/00
CPCC25B1/00C25B11/04C25B15/00
Inventor 谢奎叶灵婷
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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