Titanium oxide supported sub-nano rhodium catalyst and preparation and application thereof

A rhodium catalyst, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The effect of low temperature catalytic oxidation performance and high decomposition activity

Active Publication Date: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far it still needs to be higher than 100°C to have the ideal elimination effect, which cannot meet the needs of most practical applications.

Method used

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  • Titanium oxide supported sub-nano rhodium catalyst and preparation and application thereof
  • Titanium oxide supported sub-nano rhodium catalyst and preparation and application thereof
  • Titanium oxide supported sub-nano rhodium catalyst and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1g mixed crystal phase titanium oxide (Degussa P25, 80% anatase and 20% rutile, the same below) carrier was ultrasonically dispersed in 100mL deionized water to form a suspension; take 8mL of 0.68mg / mL chlorination Rhodium solution, add 100mL deionized water to stir and dilute, and add dropwise to the carrier suspension under vigorous stirring, adjust the pH to 9.6, stir at 80℃ for 3h, stand for 1h, filter, wash with hot water, and oven at 80℃ Dry for 12h. After drying, the catalyst was calcined in the air at 400℃ for 4h to obtain 0.5wt.% Rh / TiO 2 catalyst.

Embodiment 2

[0033] Disperse 1g P25 carrier ultrasonically in 100mL deionized water to form a suspension; take 28mL of 0.68mg / mL rhodium chloride solution, add 100mL deionized water to stir and dilute, and add dropwise to the carrier suspension under vigorous stirring , Adjust the pH to 9.8, stir at 80°C for 3h, stand for 1h, filter, wash with hot water, and dry in an oven at 80°C for 12h. After drying, the catalyst was calcined in the air at 400℃ for 4 hours to obtain 1.6wt.% Rh / TiO 2 catalyst. Example 3:

Embodiment 3

[0034] Disperse 1g of P25 carrier ultrasonically in 100mL of deionized water to form a suspension; take 40mL of 0.68mg / mL rhodium chloride solution, add 100mL of deionized water, stir and dilute, and add dropwise to the carrier suspension under vigorous stirring , Adjust the pH to 9.4, stir at 80℃ for 3h, stand for 1h, filter, wash with hot water, and dry in an oven at 80℃ for 12h. After drying, the catalyst was calcined in the air at 400℃ for 4 hours to obtain 2.5wt.% Rh / TiO 2 catalyst. Example 4:

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Abstract

The invention relates to a titanium oxide supported sub-nano rhodium catalyst and an application thereof. Specifically, the rhodium content is 0.5-5% of the total mass of the catalyst, and is highly dispersed on a titanium oxide carrier in a sub-nano (0.5-1 nm) form. The rhodium dispersed on the catalyst carrier in the sub-nano form is used as an active center of a catalytic reaction, can be used for oxidation elimination of trace carbon monoxide (CO) in an ultra-low temperature environment and low temperature catalytic decomposition of liquid unit ammonium dinitramide (ADN) aerospace propellants.

Description

Technical field [0001] The present invention relates to a titanium oxide-supported sub-nano rhodium catalyst and its application. Rhodium is highly dispersed on a titanium oxide carrier in the form of sub-nano (0.5-1nm) and serves as a catalytic active center for the oxidation of carbon monoxide (CO) in an ultra-low temperature environment. Elimination and catalytic decomposition of the liquid unit ammonium dinitramide (ADN) aerospace propellant shows high activity. Background technique [0002] CO has a wide range of sources, and all carbonaceous materials can produce CO if burned incompletely. It is estimated that the world’s total annual emissions amount to 371 million tons, which accounts for 30% of the five pollutants listed in the air quality standards, and ranks first in air pollutant emissions. Excessive CO in the environment will hinder the normal combination of oxygen and hemoglobin, make human tissues and cells hypoxia, cause poisoning, suffocation and even death. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J35/00B01D53/86B01D53/62C06D5/04
CPCB01D53/864B01J23/464B01J35/006B01J35/0066C06D5/04Y02A50/20
Inventor 王晓东关红玲林坚张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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