Method and device for thermo chemolysis of CO2 and H2O based on reaction substance circulation

Abstract

The invention relates to a CO2 emission reduction technology and aims at providing a method and a device for thermo chemolysis of CO2 and H2O based on reaction substance circulation. The method comprises the steps of feeding the H2O, I2 and SO2 into a Bunsen reaction device for automatic heat release reaction; communicating CO2 gas to a static bed or a fluid bed reactor for heat release reaction with metal Zn or Ni; circulating the products in each reaction process through each reaction device, wherein the final products are H2, CO and O2. The device provided by the invention has a lower maximum heat resource temperature (less than 900 DEG C); heat resources, such as solar energy, nuclear energy and other types can be used; negative influence caused by incomplete reaction of Zn and CO2 is reduced to a certain extent; the device is appropriate in reaction temperature and easy to realize industrial application in scale.

Description

technical field

[0001] The present invention relates to the thermochemical decomposition of CO based on the circulation of reacting species 2 and H 2 O's new method and technological process. Background technique

[0002] Currently, CO 2 Emissions are getting more and more attention, how to effectively reduce CO 2 Emissions have become an important political and economic issue around the world. Countries such as the United States, the United Kingdom, and Germany have all studied and formulated CO 2 Emission regime, Japan accelerated CO 2 The research on comprehensive utilization is planned to be established in 10 years based on CO 2 An independent industrial system for chemical raw materials. Currently looking at CO 2 On the one hand, the measures that can be taken to reduce emissions are to reduce emissions and control increments: including adjusting the energy structure, using low-carbon energy, vigorously developing clean energy such as nuclear energy, hydrogen en...

Examples

specific Embodiment 1

[0043] (1) 14molH 2 O, 1.5molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 20 ° C and 1 atm to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0044] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0045] (2) the two solutions in the Bunsen reaction unit 1 are separated in the liquid phase separation unit 2, H 2 SO 4 Phase in H 2 SO 4 After being concentrated in the concentration device 4, it enters the concentrated H 2 SO 4 In the catalytic decomposition device 5, it is first decomposed into SO at 350°C 3 and H 2 O, generated SO 3 Catalytic decomposition at 800°C to generate SO 2 and O 2 , the final...

specific Embodiment 2

[0053] (1) 15molH 2 O, 5molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 70 ° C and 1.5 atm, producing a HI phase with more water (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0054] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0055] (2) the two solutions in the Bunsen reaction unit 1 are separated in the liquid phase separation unit 2, H 2 SO 4 Phase in H 2 SO 4 After being concentrated in the concentration device 4, it enters the concentrated H 2 SO 4 In the catalytic decomposition device 5, it is first decomposed into SO at 350°C 3 and H 2 O, generated SO 3 Catalytic decomposition at 850°C to generate SO 2 and O 2 , ...

specific Embodiment 3

[0063] (1) 16molH 2 O, 9molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 120 ° C and 2 atm to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0064] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0065] (2) the two solutions in the Bunsen reaction unit 1 are separated in the liquid phase separation unit 2, H 2 SO 4 Phase in H 2 SO 4 After being concentrated in the concentration device 4, it enters the concentrated H 2 SO 4 In the catalytic decomposition device 5, it is first decomposed into SO at 350°C 3 and H 2 O, generated SO 3 Catalytic decomposition at 900°C to generate SO 2 and O 2 , the final ...

technical field

[0001] The present invention relates to the thermochemical decomposition of CO based on the circulation of reacting species 2 and H 2 O's new method and technological process. Background technique

[0002] Currently, CO 2 Emissions are getting more and more attention, how to effectively reduce CO 2 Emissions have become an important political and economic issue around the world. Countries such as the United States, the United Kingdom, and Germany have all studied and formulated CO 2 Emission regime, Japan accelerated CO 2 The research on comprehensive utilization is planned to be established in 10 years based on CO 2 An independent industrial system for chemical raw materials. Currently looking at CO 2 On the one hand, the measures that can be taken to reduce emissions are to reduce emissions and control increments: including adjusting the energy structure, using low-carbon energy, vigorously developing clean energy such as nuclear energy, hydrogen en...

Examples

specific Embodiment 1

[0043] (1) 14molH 2 O, 1.5molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 20 ° C and 1 atm to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0044] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0045] (2) the two solutions in the Bunsen reaction unit 1 are separated in the liquid phase separation unit 2, H 2 SO 4 Phase in H 2 SO 4 After being concentrated in the concentration device 4, it enters the concentrated H 2 SO 4 In the catalytic decomposition device 5, it is first decomposed into SO at 350°C 3 and H 2 O, generated SO 3 Catalytic decomposition at 800°C to generate SO 2 and O 2 , the final...

specific Embodiment 2

[0053] (1) 15molH 2 O, 5molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 70 ° C and 1.5 atm, producing a HI phase with more water (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0054] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0055] (2) the two solutions in the Bunsen reaction unit 1 are separated in the liquid phase separation unit 2, H 2 SO 4 Phase in H 2 SO 4 After being concentrated in the concentration device 4, it enters the concentrated H 2 SO 4 In the catalytic decomposition device 5, it is first decomposed into SO at 350°C 3 and H 2 O, generated SO 3 Catalytic decomposition at 850°C to generate SO 2 and O 2 , ...

specific Embodiment 3

[0063] (1) 16molH 2 O, 9molI 2 and 1molSO 2 Send it into the Bunsen reaction device 1, stir the reaction solution at a constant speed by the motor device to ensure that it is evenly mixed, and an autonomous exothermic reaction occurs at 120 ° C and 2 atm to produce a watery HI phase (HI x ) and H 2 SO 4 Phase solution, in which the HI phase mainly contains hydrogen iodide solution and excess iodine, H 2 SO 4 Phase mainly contains H 2 SO 4 Solution, the chemical reaction formula of this reaction is as follows:

[0064] I 2 +SO 2 +2H 2 O→2HI+H 2 SO 4

[0065] (2) the two solutions in the Bunsen reaction unit 1 are separated in the liquid phase separation unit 2, H 2 SO 4 Phase in H 2 SO 4 After being concentrated in the concentration device 4, it enters the concentrated H 2 SO 4 In the catalytic decomposition device 5, it is first decomposed into SO at 350°C 3 and H 2 O, generated SO 3 Catalytic decomposition at 900°C to generate SO 2 and O 2 , the final ...

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