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System for driving high-temperature electrolysis of CO2/H2O to prepare synthesis gas employing solar energy and application of system

A high-temperature electrolysis and solar energy technology, applied in electrolysis process, electrolysis components, electrodes, etc., can solve problems such as high energy consumption, poor efficiency and selectivity, and difficult electrolytic reduction

Active Publication Date: 2015-05-06
大庆绿碳纳米科技有限公司
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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 driving high-temperature electrolysis of CO2/H2O to prepare synthesis gas employing solar energy and application of system
  • System for driving high-temperature electrolysis of CO2/H2O to prepare synthesis gas employing solar energy and application of system

Examples

Experimental program
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Effect test

Embodiment 1

[0051] 20g Li respectively 2 CO 3 , 20g Na 2 CO 3 , 20g K 2 CO 3 and 45.09g KOH were ground and pulverized in a mortar and mixed evenly, and transferred into a corundum crucible; respectively, the surface area was 30cm 2 The nickel sheet and iron wire are used as anode and cathode, the reaction is not limited by the size of the electrode area, and the larger the area is beneficial to the reaction; adjust the spot size of the Fresnel lens to keep the temperature constant at 650°C; adjust the rheostat of the solar panel circuit to make the current Constantly 2A. After reacting for 1 hour, the synthesis gas content (volume percentage) in the generated gas is: 89.72% H 2 , 6.857% CO.

Embodiment 2

[0053] 20g Li respectively 2 CO 3 , 20g Na 2 CO 3 , 20g K 2 CO 3 and 51.63g Ba(OH) 2 Grind, pulverize and mix evenly in a mortar, transfer it into a corundum crucible; 2 The nickel-chromium alloy wire and iron wire are used as the anode and cathode; the concentration ratio of the reflective concentrator is adjusted to keep the temperature constant at 750°C; the rheostat of the solar panel circuit is adjusted to keep the current constant at 2A. After reacting for 1 hour, the synthesis gas content (volume percentage) in the generated gas is: 85.67% H 2 , 6.03% CO.

Embodiment 3

[0055] 30g Li respectively 2 CO 3 , 30g Na 2 CO 3 , 30g BaCO 3 , 10.18g LiOH and 33.91g ZnO were ground and pulverized in a mortar and mixed evenly, and then transferred into a high-purity nickel reactor; respectively, the surface area was 15cm 2 The nickel sheet and nickel wire are used as the anode and cathode; the spot size of the Fresnel lens is adjusted to keep the temperature constant at 600°C; the rheostat of the solar panel circuit is adjusted to keep the current constant at 1.5A. After 2 hours of reaction, the synthesis gas content (volume percentage) in the generated gas is: 83.38% H 2 , 5.81% CO.

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Abstract

The invention relates to a system for driving high-temperature electrolysis of CO2 / H2O to prepare a synthesis gas employing solar energy. The system comprises an electrolysis unit and a photo-thermal unit, wherein the electrolysis unit is composed of a photoelectric unit, a cathode, an anode, an electrolytic tank and electrolyte; the photoelectric unit is used for converting solar energy into electric energy, and providing required electrolysis voltage or current; the photo-thermal unit is used for converting the solar energy into heat energy, heating solid electrolyte to reach the molten state, and heating the electrolytic tank to the electrolysis temperature; and the electrolyte is mixed molten electrolyte. By virtue of thermal / electric coupling action of the solar light-heat-electrochemical coupling process, a perfect green solar conversion and storage system is formed; the system has the characteristics of being clean, safe and sustainable; a new way is provided for energy conservation and emission reduction and comprehensive utilization of solar resources; meanwhile, common electrolytic conversion of CO2 / H2O is achieved at low electrolysis voltage and relatively low temperature, so as to prepare the synthesis gas; and CO2 resource utilization is efficiently achieved in an energy-saving manner.

Description

technical field [0001] The invention relates to a new energy solar energy drive CO 2 / H 2 O conversion to synthesis gas system and its application, which belong to solar energy utilization, 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 ...

Claims

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Application Information

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IPC IPC(8): C25B1/02C25B1/00C25B11/04C25B9/00C25B9/04
CPCC25B1/00C25B1/02C25B9/00C25B9/65C25B11/055C25B11/061Y02E60/36Y02P20/133
Inventor 吴红军刘悦王宝辉朱艳吉谷笛罗明检
Owner 大庆绿碳纳米科技有限公司
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