A kind of titanium oxide supported subnano rhodium catalyst and its preparation and application

A rhodium catalyst, catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as unsatisfactory, achieve good low-temperature startability, excellent Effect of low-temperature catalytic oxidation performance and high decomposition activity

Active Publication Date: 2019-07-12
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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  • A kind of titanium oxide supported subnano rhodium catalyst and its preparation and application
  • A kind of titanium oxide supported subnano rhodium catalyst and its preparation and application
  • A kind of titanium oxide supported subnano rhodium catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

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

Embodiment 3

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

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Abstract

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

Description

technical field [0001] The invention relates to a titanium oxide-supported subnano-rhodium catalyst and its application. The rhodium is highly dispersed on the titanium oxide carrier in the form of sub-nanometer (0.5-1nm), and acts as a catalytic active center for the oxidation of carbon monoxide (CO) in an ultra-low temperature environment. Elimination and catalytic decomposition of liquid unit ammonium dinitramide (ADN) aerospace propellant exhibited high activity. Background technique [0002] CO has a wide range of sources, and incomplete combustion of all carbon-containing substances can produce CO. It is estimated that the world's annual total discharge amounted to 371 million tons, accounting for 30% of the five gases included in the air quality standards, ranking first in the emission of air pollutants. Excessive CO in the environment will hinder the normal combination of oxygen and hemoglobin, causing hypoxia in human tissues and cells, causing poisoning, suffocati...

Claims

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Application Information

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Patent Type & Authority Patents(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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