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Solar-driven system for producing hydrocarbon by electrolyzing CO2/H2O at high temperature and application thereof

A technology of high-temperature electrolysis and solar energy, applied in electrolysis process, electrolysis components, electrolysis organic production, etc., can solve problems such as poor efficiency and selectivity, complex electrolysis reaction, high energy consumption, etc.

Active Publication Date: 2015-04-29
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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  • Solar-driven system for producing hydrocarbon by electrolyzing CO2/H2O at high temperature and application thereof
  • Solar-driven system for producing hydrocarbon by electrolyzing CO2/H2O at high temperature and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 17.2g Li 2 CO 3 , 17.2g Na 2 CO 3 , 17.2g K 2 CO 3 and 49.86g LiOH were ground and pulverized in a mortar and mixed evenly, and transferred into a corundum crucible; the surface area was 30cm 2 Platinum 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; keep the temperature constant at 500°C and the current constant at 1A. After 2 hours of reaction, the hydrocarbon content (volume percentage) in the generated gas was: 46.87% methane, 0.986% ethylene, 5.736% ethane, 0.183% propylene, 0.391% propane, 0.467% n-butane.

Embodiment 2

[0087] 20g Li respectively 2 CO 3 , 20g Na 2 CO 3 , 20g K 2 CO 3 and 67.63g KOH were ground and pulverized in a mortar and mixed evenly, and transferred into a corundum crucible; respectively, the surface area was 20cm 2 The nickel sheet and iron wire are used as anode and cathode; the temperature is kept constant at 550°C, and the current is kept constant at 1A. After reacting for 2 hours, the hydrocarbon content (volume percentage) in the generated gas was: 27.574% methane, 3.314% ethylene, 2.574% ethane, 0.887% propane, 0.157% n-butane.

Embodiment 3

[0089] 15g Li respectively 2 CO 3 , 15g Na 2 CO 3 , 15g K 2 CO 3 and 76.09g NaOH in a mortar, grind and mix evenly, and transfer it into a high-purity nickel reactor; the surface area is 20cm 2 The nickel-chromium alloy wire and iron wire are used as anode and cathode; the temperature is kept constant at 600°C, and the current is kept constant at 2A. After reacting for 1 hour, the hydrocarbon content (volume percentage) in the gas produced is: 18.27% methane, 2.419% ethylene, 2.195% ethane, 0.184% propylene, 1.248% propane, 0.185% isobutane, 0.084% n-butane and 0.174% pentane.

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Abstract

The invention relates to a solar-driven system for producing hydrocarbon by electrolyzing CO2 / H2O at a high temperature. The system comprises an electrolysis unit and a photo-thermal unit, wherein the electrolysis unit comprises a photoelectric unit, a cathode, an anode, an electrolytic cell and an electrolyte; the photoelectric unit is used for converting solar energy into electric energy to provide required electrolytic voltage or current; the photo-thermal unit is used for converting solar energy into thermal energy to melt the solid electrolyte and heat the electrolytic cell to an electrolysis temperature; and the electrolyte is a mixed molten electrolyte. The system becomes a perfect green solar energy conversion and storage system by virtue of the thermal / electric coordination and coupling effect during the solar light-heat-electricity chemical coupling process, has the characteristics of cleanness, safety and sustainability, and provides a new way for energy saving, emission reduction and comprehensive utilization of solar energy resources; and meanwhile, the system realizes hydrocarbon production by co-electrolysis conversion of CO2 / H2O under the conditions of low electrolytic voltage and relative low temperature and realizes energy-saving and high-efficiency CO2 resource utilization.

Description

technical field [0001] The invention relates to a new energy solar energy drive CO 2 / H 2 O conversion hydrocarbon production system and its application 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 f...

Claims

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Application Information

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IPC IPC(8): C25B3/04C25B3/10C25B9/04C25B3/25C25B3/29
CPCY02P20/133
Inventor 吴红军李志达王宝辉苑丹丹毛前军李莉
Owner NORTHEAST GASOLINEEUM UNIV
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