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System for preparing synthetic gas by virtue of high-temperature electrolysis of CO2/H2O and application of system

A high-temperature electrolysis and synthesis gas technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of difficulty in electrolytic reduction, high energy consumption, poor efficiency and selectivity, etc., and achieve the effect of high-efficiency, energy-saving and resource utilization.

Active Publication Date: 2015-05-06
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current CO 2 Electrochemical reduction studies mainly focus on CO 2 Dissolved in aqueous solvents and non-aqueous organic solvents, but this also limits its industrial application. In addition, CO 2 For gas molecules, direct electrolytic reduction is very difficult. First, high energy consumption (high electrolysis voltage) is required. Second, the electrolytic reaction is very complicated, and the efficiency and selectivity are poor.

Method used

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  • System for preparing synthetic gas by virtue of high-temperature electrolysis of CO2/H2O and application of system
  • System for preparing synthetic gas by virtue of high-temperature electrolysis of CO2/H2O and application of system

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Experimental program
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Effect test

Embodiment 1

[0055] 30g Li respectively 2 CO 3 , 30g Na 2 CO 3 , 30g K 2 CO 3 and 72.02g Zn(OH) 2 Grind, pulverize and mix evenly in a mortar, transfer it into a corundum crucible; 2 The nickel sheet and nickel wire are used as the anode and cathode, and the reaction is not limited by the size of the electrode area, and the larger the area is, the better the reaction is; keep the temperature at 600°C and the current at 2A. After reacting for 1 hour, the synthesis gas content (volume percentage) in the generated gas is: 76.83% H 2 , 4.19% CO.

Embodiment 2

[0057] 20g Li respectively 2 CO 3 , 20g Na 2 CO 3 , 20g K 2 CO 3 and 33.82g KOH were ground and pulverized in a mortar and mixed evenly, and transferred into a corundum crucible; the surface area was 30cm 2 The nickel-chromium alloy wire and iron wire are used as anode and cathode; the temperature is kept constant at 650°C, and the current is kept constant at 2A. After reacting for 1 hour, the synthesis gas content (volume percentage) in the generated gas is: 90.38% H 2 , 8.671% CO.

Embodiment 3

[0059] 30g Li respectively 2 CO 3 , 30g Na 2 CO 3 , 30g BaCO 3 , 33.63g NaOH and 2g Na 2 SiO 3 Grind, pulverize and mix evenly in a mortar, transfer it into a corundum crucible; 2 The nickel sheet and iron wire are used as anode and cathode; the temperature is kept constant at 700°C, and the current is kept constant at 1.5A. After 1 hour of reaction, the synthesis gas content (volume percentage) in the generated gas is: 82.67% H 2 , 6.657% CO.

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Abstract

The invention relates to a system for preparing synthetic gas by virtue of high-temperature electrolysis of CO2 / H2O and an application of the system. The system comprises an electrolytic unit and an electric heating unit, wherein the electric heating unit is used for heating the electrolytic unit, the electrolytic unit comprises a direct current power source, a cathode, an anode, an electrolytic cell and an electrolyte, the electrolyte is a mixture of molten carbonate and molten hydroxide, or a mixture of molten carbonate and molten oxide or a mixture of molten carbonate, molten hydroxide and molten oxide; and in electrolysis, the current of the direct current power source is within (0A-3A) range, the temperature of the electrolytic cell is above 600 DEG C and the electrolyte is regenerated by virtue of absorbing CO2 / H2O in air. By virtue of the system, under low electrolysis voltage and a relatively low temperature, the preparation of synthetic gas by virtue of co-electrolysis of CO2 / H2O is achieved. The electrolysis reaction is relatively simple, the reaction selectivity is good and the resource utilization of CO2 can be simply and efficiently achieved in energy-saving and low cost manners.

Description

technical field [0001] The invention relates to a high-temperature electrolytic CO 2 / H 2 O conversion to synthesis gas system and its application, which belong to energy saving and emission reduction and CO 2 resource field. Background technique [0002] CO 2 It is one of the most important greenhouse gases that cause global climate change. CO 2 The large amount of CO emissions has become an international issue that will have a major impact on future changes in the world pattern. How to control CO 2 The emission of carbon dioxide has been listed as the primary topic of governments and United Nations conferences, and has become a strategic issue to be solved urgently among many major global issues. In addition, carbon dioxide is a potential carbon resource, so it is of great strategic significance to develop corresponding carbon dioxide recovery and utilization technologies. At present, the recovery and transformation of carbon dioxide mainly focus on catalytic activat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/02C25B1/00C25B11/04C25B9/00
CPCC25B1/00C25B1/02C25B9/00C25B11/061Y02P20/10
Inventor 吴红军马越王宝辉毛前军隋欣刘先军郑振阳
Owner NORTHEAST GASOLINEEUM UNIV
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