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Method for producing carbon monoxide and production apparatus

A manufacturing method and carbon monoxide technology, applied in the direction of carbon monoxide, energy input, etc., to achieve the effect of reducing temperature

Inactive Publication Date: 2013-03-27
MITSUI MINING & SMELTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document does not describe at all that among oxygen ion conductive ceramic conductors, cerium oxide containing rare earth elements (excluding cerium) or zirconia containing rare earth elements has reversible oxygen vacancies or requires reversible carbon monoxide from carbon dioxide. oxygen deficiency

Method used

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  • Method for producing carbon monoxide and production apparatus
  • Method for producing carbon monoxide and production apparatus
  • Method for producing carbon monoxide and production apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] (1) Production of lanthanum-containing cerium oxide with reversible oxygen deficiency

[0078] (A) Synthesis of cerium oxide containing lanthanum

[0079] Powder of composite oxide of cerium oxide-lanthanum oxide is used. This composite oxide is an oxide prepared so that the ratio of the number of moles of lanthanum to the total amount of the number of moles of cerium and lanthanum becomes 0.2. 50 g of the composite oxide was allowed to stand still in a heating furnace, and heated while circulating air for firing. The heating was started from room temperature and heated at a temperature increase rate of 5°C / min. After reaching 1000°C, the temperature was maintained for 2 hours. The air flow rate is set to 0.5L / min. Then, it was allowed to cool naturally to obtain lanthanum-containing ceria without reversible oxygen defects. In the measurement using XRD, no La 2 O 3 Diffraction peaks, only observed from CeO 2 Diffraction peaks. From this result, it was confirmed that lan...

Embodiment 2

[0104] In Example 2, the praseodymium-containing cerium oxide that does not have reversible oxygen defects was not subjected to hydrogen reduction, and the conversion evaluation from carbon dioxide gas to carbon monoxide gas was directly performed. In addition, for the praseodymium-containing cerium oxide, the reversible oxygen defect generation process using reducing gas is not performed, and it directly reacts with carbon dioxide gas to measure T CO2 . The results are shown in Table 1 below.

[0105] Table 1

[0106]

[0107] As indicated by the results shown in Table 1, it was found that carbon dioxide can be converted into carbon monoxide by using the conversion agent obtained in each example. In particular, as shown by the comparison between Examples 1-7 and Reference Example 1 at a temperature of 400°C, it was found that by adding rare earth elements such as lanthanum (excluding cerium) to cerium oxide, carbon monoxide is generated from carbon dioxide even at a lower tempe...

Embodiment 8 and 9

[0110] As the composite oxide of cerium oxide-lanthanum oxide, an oxide prepared so that the ratio of the moles of lanthanum to the total moles of cerium and lanthanum reaches the value shown in Table 2 was used. 1 In the same manner, the lanthanum-containing ceria containing no reversible oxygen deficiency of Examples 8 and 9 was obtained. In the measurement by XRD, the lanthanum-containing cerium oxides of Examples 8 and 9 without reversible oxygen defects were not observed to be derived from La 2 O 3 Diffraction peaks, only observed from CeO 2 Diffraction peaks. From this result, it was confirmed that lanthanum was dissolved in cerium oxide. In the same manner as in Example 1, from the lanthanum-containing cerium oxide having no reversible oxygen deficiency, the lanthanum-containing cerium oxide having reversible oxygen deficiency of Examples 8 and 9 was obtained. For the obtained lanthanum-containing cerium oxide without reversible oxygen defects, the same T as in Example ...

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Abstract

This method for producing carbon monoxide involves producing carbon monoxide by bringing a metal oxide having oxygen ion conductivity and reversible oxygen deficiency into contact with a carbon-dioxide-containing gas while heating, and reducing the carbon dioxide according to a stoichiometric reaction. The method for producing carbon monoxide is characterized in that cerium oxide containing a rare earth element (excluding cerium) or zirconium oxide containing a rare earth element is used as the aforementioned metal oxide. In the cerium oxide containing a rare earth element (excluding cerium), the ratio of the number of moles of the rare earth element (excluding cerium) to the total number of moles of cerium and the rare earth element (excluding cerium) is preferably 0.001 to 0.5. In the zirconium oxide containing a rare earth element, the ratio of the number of moles of the rare earth element to the total number of moles of zirconium and the rare earth element is preferably 0.001 to 0.5.

Description

Technical field [0001] The present invention relates to a manufacturing method and manufacturing apparatus of carbon monoxide using carbon dioxide as a raw material. In addition, the present invention relates to a transforming agent used in the manufacturing method. Background technique [0002] Carbon dioxide is known as a greenhouse gas. The concentration of carbon dioxide in the atmosphere continues to rise, becoming a cause of global warming. Therefore, from the viewpoint of preventing global warming, technology to recover the carbon dioxide released into the environment is very important. [0003] As a technology for recovering carbon dioxide, for example, it has been proposed to use oxygen-deficient iron oxides to decompose carbon dioxide gas into carbon monoxide gas and oxygen, and use the generated oxygen to restore the oxygen-deficient iron oxides to the original iron oxides. A technology that recovers only carbon monoxide gas (see Patent Document 1). [0004] The above-...

Claims

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Application Information

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IPC IPC(8): C01B31/18C01B32/40
CPCC01B31/18C01B32/40Y02P20/129
Inventor 名井肇八岛勇菅野明弘柴田阳介妹尾雄一木下和也
Owner MITSUI MINING & SMELTING CO LTD
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