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JP-2026075392-A - Carbon dioxide emission reduction plants and carbon dioxide emission reduction methods

JP2026075392AJP 2026075392 AJP2026075392 AJP 2026075392AJP-2026075392-A

Abstract

[Problem] To provide a carbon dioxide emission reduction plant and a carbon dioxide emission reduction method that can contribute to mitigating global warming by reducing carbon dioxide (CO2) emissions. [Solution] The carbon dioxide emission reduction plant 1 includes a parabolic reflector 2 that takes in sunlight and concentrates the sunlight it has taken in, and a reaction device 10 that is irradiated with the light concentrated by the parabolic reflector 2 and heated by the irradiated light to cause a chemical reaction between carbon dioxide and methane. [Selection Diagram] Figure 1

Inventors

  • 渡邉 烈

Assignees

  • 渡邉 烈

Dates

Publication Date
20260508
Application Date
20241022

Claims (8)

  1. A solar light concentrator that captures sunlight and concentrates the captured sunlight, A carbon dioxide emission reduction plant characterized by comprising a reaction apparatus that chemically reacts carbon dioxide and methane by irradiating them with light concentrated by the aforementioned solar light concentrator and heating them with the irradiated light.
  2. The reaction apparatus comprises a reaction tube into which carbon dioxide and methane are supplied, with its front end positioned close to the solar light concentrator; a piston inserted into the reaction tube from the rear end, which varies the volume of the reaction space within the reaction tube depending on the insertion position; and a biasing means that biases the reaction tube toward a position away from the solar light concentrator. The carbon dioxide emission reduction plant according to claim 1, characterized in that, in accordance with the magnitude of the pressure inside the reaction tube, the reaction tube moves toward the solar light concentrator against the biasing means, and the volume of the reaction space inside the reaction tube and the thermal energy supplied to the reaction tube are adjusted.
  3. The carbon dioxide emission reduction plant according to claim 2, characterized in that, when the reaction tube receives solar energy exceeding the minimum temperature at which a chemical reaction occurs, the reaction tube moves in a direction toward the solar light concentrator against the biasing force of the biasing means, and the front end position of the reaction tube is located in front of the focal point of the light irradiated from the solar light concentrator.
  4. The carbon dioxide emission reduction plant according to claim 2, characterized in that the reaction tube has a main section into which the piston is inserted, and a plurality of first and second foliate vein sections branching out from the main section in different directions, and the tips of each of the first and second foliate vein sections extend to the front end of the reaction apparatus.
  5. The carbon dioxide emission reduction plant according to claim 4, characterized in that a hydrogen separation membrane is provided between adjacent portions of either the first or second foliate vein, and a carbon monoxide layer separation membrane is provided between adjacent portions of the other foliate vein.
  6. The carbon dioxide emission reduction plant according to claim 1, characterized in that the solar light concentrating device comprises a parabolic reflector with an entrance opening positioned toward the sun, and a primary reflector that reflects the reflected light from the parabolic reflector and irradiates it as focused light.
  7. Equipped with an automatic solar tracking device, The carbon dioxide emission reduction plant according to claim 1, characterized in that the automatic solar tracking device comprises a solar position acquisition means for acquiring the current position of the sun, and a driving means for driving the light inlet of the solar light concentrator to a position facing the sun based on the data acquired by the solar position acquisition means.
  8. The process involves capturing sunlight using a solar light concentrator and concentrating the captured sunlight, A method for reducing carbon dioxide emissions, characterized by comprising the step of irradiating a reaction vessel with light concentrated by the aforementioned solar light concentrator, thereby heating the reaction vessel with the irradiated light and causing a chemical reaction between carbon dioxide and methane in the reaction vessel.

Description

This invention relates to a carbon dioxide emission reduction plant and a carbon dioxide emission reduction method. Carbon dioxide is a cause of global warming, and various technologies have been proposed to reduce its emissions. For example, a method utilizing the dry oxidative reforming reaction (dry reforming) of methane is disclosed in Patent Document 1. Patent Document 1 describes a method for synthesizing hydrogen and carbon monoxide by reacting methane and carbon dioxide, in which a catalyst consisting of a support bearing a mixture of nickel and one or more rare earth metal oxides and one or more platinum group metals is used. It also states that smooth reaction cannot be ensured unless the reaction temperature is in the range of 400°C to 1000°C (preferably around 700°C). Japanese Patent Application Publication No. 5-270802 The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments. This diagram illustrates the schematic configuration of a carbon dioxide emission reduction plant in this embodiment. This diagram illustrates the schematic configuration of the reaction apparatus in this embodiment. This embodiment is illustrated in the control block diagram of a carbon dioxide emission reduction plant. This embodiment is shown, where (a) is a schematic diagram of the reaction tube in its initial position, and (b) is a schematic diagram of the reaction tube in a state where it has moved to the front side. This diagram illustrates this embodiment, illustrating the injection of gas into the reaction tube and the discharge of gas from the reaction tube. The following describes each embodiment in detail with reference to the attached drawings. In this embodiment, already known technologies are omitted from the explanation. Furthermore, the devices and methods described are illustrative examples for realizing the technical idea of the invention, and the technical idea of the present invention is not limited to those described below. The technical idea of the present invention can be modified in various ways within the scope of the claims. In particular, it should be noted that the drawings are schematic and may differ from reality. (Embodiment) The integrated plant is composed of carrying out the first chemical equation CO2 + CH4 → 2CO + 2H2, then the second chemical equation CO + 2H2 → CH3OH, and then the third chemical equation CH3OH + CO → CH3COOH. The carbon dioxide emission reduction plant according to the embodiment of the present invention carries out the first chemical equation described above. This will be explained below. As shown in Figure 1, the carbon dioxide emission reduction plant 1 comprises a parabolic reflector 2, which is a solar light concentrator that captures and concentrates sunlight; a reaction device 10 that receives the light concentrated by the parabolic reflector 2 and uses the light to heat and chemically react carbon dioxide (CO2) and methane (CH4); and an automatic solar tracking device 20 that automatically tracks the parabolic reflector 2 to face the sun. The parabolic reflector 2 comprises a parabolic reflector 3 and a primary reflector 4. The parabolic reflector 3 has a side wall 3a whose inner surface is formed from a parabolic surface, and the widened end of this side wall 3a forms a light entry port 3b. The parabolic reflector 3 reflects sunlight incident from the light entry port 3b along the central axis of the side wall 3a toward the focal point. A light transmission port (not shown) is provided at the rear end of the side wall 3a. The light entry port 3b of the parabolic reflector 3 is circular in shape. The parabolic reflector 3 is supported by multiple legs 5. Each leg 5 is equipped with three hydraulic cylinders 23 of the automatic solar tracking device 20. By varying the effective length of each leg 5 using the hydraulic cylinders 23, the orientation of the parabolic reflector 3 can be freely changed. One end of a fixing cable 6 is fixed to the side wall 3a of the parabolic reflector 3. The other end of each fixing cable 6 is fixed to the spring fixing part 13 described below. This connects the parabolic reflector 3 and the spring fixing part 13 via a fixed distance. The distance between the parabolic reflector 3 and the spring fixing part 13 remains constant even when the reaction tube 12 moves, as described below. The primary reflector 4 is fixed to the parabolic reflector 3 via a support rod 7. The primary reflector 4 is positioned on the central axis of the parabolic reflector 3, and at a location where almost all of the reflected light from the parabolic reflector 3 can be incident upon it. The primary reflector 4 has, for example, a semi-circular reflective surface, and the incident light from the parabolic reflector 3 is reflected at this surface. The reflected light reflected at the reflective surface passes through