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CN-121972117-A - Solar photo-thermal catalysis of CO2Reduction integrated reactor

CN121972117ACN 121972117 ACN121972117 ACN 121972117ACN-121972117-A

Abstract

The invention discloses a solar photo-thermal catalytic CO 2 reduction integrated reactor which comprises a photo-thermal reactor, an air source and a cold trap, wherein the photo-thermal reactor comprises a reactor cavity, a light-transmitting upper cover is arranged at the top of the reactor cavity, a porous medium catalyst carrier and a heat insulation layer are arranged in the cavity, vertical through holes are uniformly distributed in the heat insulation layer, capillary cores are filled in the vertical through holes, a reactor air inlet connected with the air source is arranged at the lower part of the cavity, a reactor air outlet connected with the cold trap is arranged at the upper part of the cavity, and a temperature monitoring device, a light power meter, a pressure monitoring device and a gas chromatograph are further arranged. The invention constructs an energy-mass flow matched gas-liquid-solid three-phase reaction interface, solves the problems of low spectrum utilization rate, unbalanced reactant supply, large energy loss and the like of the traditional photocatalysis system, continuously provides sufficient energy and reactant molecules for the reaction, and cooperatively promotes the catalytic reaction to be carried out in the aspects of energy conversion and mass transfer.

Inventors

  • XUAN YIMIN
  • WANG JIN
  • ZHU QIBIN

Assignees

  • 南京航空航天大学

Dates

Publication Date
20260505
Application Date
20260129

Claims (10)

  1. 1. The solar photo-thermal catalytic CO 2 reduction integrated reactor is characterized by comprising a photo-thermal reactor (1), a gas source and a cold trap (4), wherein the photo-thermal reactor (1) comprises a reactor cavity (18), a light-transmitting upper cover (10) is arranged at the top of the reactor cavity (18), a porous medium catalyst carrier (12) for supporting a catalyst is arranged in the reactor cavity (18), a reactor gas inlet (14) connected with the gas source is arranged at the lower part of the reactor cavity, a reactor gas outlet (16) connected with the cold trap (4) is arranged at the upper part of the reactor cavity, a heat insulation layer (17) for supporting the porous medium catalyst carrier (12) and insulating heat is arranged below the porous medium catalyst carrier (12), vertical through holes are uniformly distributed in the heat insulation layer (17), capillary cores (13) for realizing efficient transmission of a reaction solution from the lower part of the reactor cavity (18) to the porous medium catalyst carrier (12) through capillary action are filled in the vertical through holes, the capillary cores are further arranged in the vertical through holes, the capillary cores are respectively used for monitoring the temperature and pressure in the photo-thermal reactor, the temperature monitoring device, the pressure monitoring device and the gas phase chromatograph (4) are connected with the gas chromatograph (6) for detecting the photo-thermal detector (1), and the gas chromatograph (5) is used for detecting the photo-thermal detector and detecting the strength of the gas phase chromatograph.
  2. 2. The solar photo-thermal catalytic CO 2 reduction integrated reactor according to claim 1, wherein the cold trap (4) comprises an incubator (21), a gas collecting bottle (20) and a thermoelectric refrigerating sheet (19), a gas inlet of the gas collecting bottle (20) is connected with the photo-thermal reactor (1), a gas outlet is connected with the gas chromatograph (5), a cold end of the thermoelectric refrigerating sheet (19) is arranged at the top of the incubator (21), a hot end of the thermoelectric refrigerating sheet is arranged outside and is used for forming a low-temperature zone in the incubator (21), and gas flows out from a gas outlet (16) of the reactor, enters the gas collecting bottle (20) and is used for cooling and drying reaction gas to collect organic matters and liquid-phase products.
  3. 3. The integrated reactor for solar photo-thermal catalytic CO 2 reduction according to claim 1, wherein the porous medium catalyst carrier (12), the heat insulation layer (17) and the capillary core (13) are all detachable, and after detachment, the catalyst is dispersed in the reaction solution, so that the CO 2 reduction test under the condition of a liquid-solid phase suspension system can be realized.
  4. 4. The solar photo-thermal catalytic CO 2 reduction integrated reactor according to claim 1 is characterized in that a gas mixing tank (3) is connected between the gas source and the photo-thermal reactor (1), and the gas mixing tank (3) is connected with a reactor gas inlet (14) through a gas pipeline and is used for realizing uniform mixing of different gases in the gas mixing tank (3).
  5. 5. The integrated reactor for solar photo-thermal catalytic CO 2 reduction according to claim 1, wherein a gas flow meter (2) for controlling the gas flow is connected between the gas source and the photo-thermal reactor (1).
  6. 6. The solar photo-thermal catalytic CO 2 reduction integrated reactor according to claim 1, wherein the temperature monitoring device comprises a thermocouple (8), the thermocouple (8) being inserted into the catalyst layer through a temperature monitoring interface (11) on the photo-thermal reactor (1).
  7. 7. The solar photo-thermal catalytic CO 2 reduction integrated reactor according to claim 6, wherein the thermocouple (8) is connected with a data collector (7) for recording temperature data.
  8. 8. The integrated reactor for solar photo-thermal catalytic CO 2 reduction according to claim 1, wherein the pressure monitoring device (9) is a differential pressure transmitter, and the digital controller displays the pressure change in real time.
  9. 9. The integrated reactor for solar photo-thermal catalytic CO 2 reduction according to claim 1, wherein the light-transmitting upper cover (10) is a quartz glass cover plate, has anti-fog high light-transmitting characteristics, and is used for preventing incident light scattering caused by condensation of water vapor to form liquid drops.
  10. 10. The solar photo-thermal catalytic CO 2 reduction integrated reactor as claimed in claim 1, wherein a sealing rubber ring (15) is arranged between the light-transmitting upper cover (10) and the reactor cavity (1).

Description

Solar photo-thermal catalytic CO 2 reduction integrated reactor Technical Field The invention relates to a photo-thermal catalytic reactor, in particular to a solar photo-thermal catalytic CO 2 reduction integrated reactor. Background Excessive consumption of traditional fossil fuels results in massive emissions of carbon dioxide, causing global problems such as greenhouse effect and energy crisis. The new energy technology is developed, the carbon dioxide emission is greatly reduced, and the sustainable development is imperative. The solar energy is used as inexhaustible renewable energy, has wide prospect and great potential in the field of new energy utilization, and the solar-driven photocatalytic CO 2 is used for preparing hydrocarbon fuel through reduction, has the advantages of simple system, mild condition and the like, and is a very promising method for simultaneously relieving the problems of energy shortage and environmental pollution. The reaction equation for preparing hydrocarbon fuel by photocatalytic CO 2 reduction is CO 2+H2O=CxHyOz+O2. The photocatalytic CO 2 reduction reaction is a coupling process which relates to solar energy capture, energy and mass transfer and chemical conversion and spans multiple time-space dimensions, so that the reaction rate is closely related to the distribution of multiple physical fields such as light transmission, temperature change, substance concentration and the like in the reaction process besides being influenced by the performance of the catalyst, and is different from the photocatalytic hydrogen production reaction, the problems of the diffusion adsorption of CO 2 and the supply balance of reactants, which are related to the reduction of the photocatalytic CO 2, are also key constraint factors of low reaction rate and energy efficiency, the reactor is very important as a carrier and a place of the distribution of the multiple physical fields for all the links, and the current research focuses on experimental test on the property improvement of the catalyst, and the research on the regulation rule of the catalytic performance aiming at external reaction environment and parameters is still insufficient. In addition, the existing photocatalytic reactor is mostly limited to basic activity test of the catalyst, optimization of an energy transfer process is ignored in the design process, key functional modules such as real-time regulation and control of the reaction process and in-situ parameter monitoring are imperfect, so that an adaptive CO 2 reduction reaction condition is difficult to construct, and data support cannot be provided for analysis of a reaction mechanism. Disclosure of Invention The invention aims to provide the solar photo-thermal catalytic CO 2 reduction integrated reactor which can promote CO 2 adsorption, product desorption, adjust reactant supply and promote reaction temperature, so as to promote catalytic reaction and realize in-situ real-time monitoring and analysis of reaction parameters. The solar photo-thermal catalytic CO 2 reduction integrated reactor comprises a photo-thermal reactor body, a gas source and a cold trap, wherein the photo-thermal reactor body comprises a reactor cavity body, a light-transmitting upper cover is arranged at the top of the reactor cavity body, a porous medium catalyst carrier used for supporting a catalyst is arranged in the reactor cavity body, a reactor gas inlet connected with the gas source is arranged at the lower part of the reactor cavity body, a reactor gas outlet connected with the cold trap is arranged at the upper part of the reactor cavity body, a heat insulation layer used for supporting the porous medium catalyst carrier and insulating heat is arranged below the porous medium catalyst carrier, vertical through holes are uniformly distributed in the heat insulation layer, capillary cores used for realizing efficient transmission of reaction solution from the lower part of the reactor cavity body to the porous medium catalyst carrier through capillary action are filled in the vertical through holes, the reactor body further comprises a temperature monitoring device and a pressure monitoring device used for monitoring the temperature and the pressure of the photo-thermal reactor respectively, a gas chromatograph used for detecting and quantitatively analyzing gas phase products is connected with the gas outlet of the cold trap, and a photo-power meter used for detecting the intensity of light irradiated on the photo-thermal reactor is arranged below the porous medium catalyst carrier. The porous medium catalyst carrier has the characteristics of high porosity, stable mechanical and chemical properties and the like, is used for loading a catalyst, constructs a gas-liquid-solid three-phase reaction interface, and continuously supplies sufficient energy and reactant molecules for CO 2 reduction reaction. The heat insulation layer can limit heat to the catalyst layer, so that the catalytic r