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Precious metal catalyst taking potassium/titanium oxide (B) as carrier and preparation method thereof

A precious metal catalyst, titanium oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of difficult to precisely control the distribution, affecting the catalytic effect and other problems

Active Publication Date: 2021-03-30
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these catalysts are prepared, the alkali metal promoter is an external additive, and it is difficult to precisely control its distribution in the catalyst. The local excess alkali metal will cover the surface of the active component noble metal, affecting the catalytic effect

Method used

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  • Precious metal catalyst taking potassium/titanium oxide (B) as carrier and preparation method thereof
  • Precious metal catalyst taking potassium/titanium oxide (B) as carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Mix potassium carbonate and metatitanic acid according to the titanium / potassium molar ratio of 0.95, age and dry, then place in a muffle furnace for roasting, keep warm, cool down, and then ball mill to obtain K 2 Ti 2 o 5 powder; then, the resulting powder was placed in a saturated CaCl 2 solution in an autoclave and heated at a constant temperature of 180°C for 24 hours;

[0024] (2) Ion-exchange the powder obtained in step (1) with dilute nitric acid aqueous solution, control the pH value of the solution to 2, control the solid-liquid ratio to 1g / 100mL, update the acid solution 3 times, separate by suction filtration, dry, and dry at 500°C Roasting at a constant temperature for 2 hours to obtain a potassium / titanium oxide (B) carrier material; the potassium content detected by X-ray photoelectron spectroscopy is 1.1wt%, and the titanium oxide (B) phase content obtained by Raman spectroscopy is 55wt%;

[0025] (3) Utilize the impregnation method to support plat...

Embodiment 2

[0027] 1. Mix potassium carbonate and metatitanic acid according to the titanium / potassium molar ratio of 0.95, age and dry, then place in a muffle furnace for roasting, keep warm, cool down, and then ball mill to obtain K 2 Ti 2 o 5 powder; then, the resulting powder was placed in a saturated CaCl 2 solution in an autoclave and heated at a constant temperature of 180°C for 24 hours;

[0028] (2) Ion-exchange the powder obtained in step (1) with dilute hydrochloric acid aqueous solution, control the pH value of the solution to 6, and control the solid-liquid ratio to 1g / 100mL, update the acid solution 3 times, separate by suction filtration, dry, and dry at 350°C Roasting at a constant temperature for 2 hours to obtain a potassium / titanium oxide (B) carrier material; the potassium content detected by X-ray photoelectron spectroscopy is 6.2wt%, and the titanium oxide (B) phase content obtained by Raman spectroscopy is 99wt%;

[0029] (3) Utilize impregnation method to load r...

Embodiment 3

[0031] 1. Mix potassium carbonate and metatitanic acid according to the titanium / potassium molar ratio of 0.95, age and dry, then place in a muffle furnace for roasting, keep warm, cool down, and then ball mill to obtain K 2 Ti 2 o 5 powder; then, the resulting powder was placed in a saturated CaCl 2 solution in an autoclave and heated at a constant temperature of 180°C for 24 hours;

[0032] (2) Ion-exchange the powder obtained in step (1) with dilute phosphoric acid aqueous solution, control the pH value of the solution to 4, control the solid-liquid ratio to 1g / 100mL, update the acid solution 4 times, separate by suction filtration, dry, and dry at 650°C Roasting at a constant temperature for 2 hours to obtain a potassium / titanium oxide (B) carrier material; the potassium content detected by X-ray photoelectron spectroscopy is 3.2wt%, and the titanium oxide (B) phase content obtained by Raman spectroscopy is 20wt%;

[0033](3) Utilize the impregnation method to load gold...

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Abstract

The invention discloses a precious metal catalyst taking potassium / titanium oxide (B) as a carrier and a preparation method of the precious metal catalyst, the catalyst takes titanium oxide (B) phaseand potassium generated in situ as carriers and pecious metal as an active component, the content of potassium is 0.1-10wt%, the loading capacity of precious metal is 0.05-5wt%, and the content of titanium oxide (B) phase in the carriers is not less than 20wt%. The catalyst has excellent room-temperature formaldehyde removal performance, and the formaldehyde conversion rate can reach 99.9% at 30 DEG C. The preparation method of the precious metal catalyst is simple to operate, and the composition structure of the product is controllable.

Description

technical field [0001] The invention relates to the field of preparation of catalytic materials, in particular to a noble metal catalyst with potassium / titanium oxide (B) as a carrier and a preparation method thereof. Background technique [0002] With the improvement of living standards, people pay more and more attention to indoor air quality. At present, formaldehyde is generally considered to be the first killer among indoor pollutants. Formaldehyde has been identified as carcinogenic and teratogenesis shape substance by the World Health Organization. Therefore, it is of great significance to develop efficient air purification technology. Among the existing formaldehyde purification methods, catalytic oxidation is considered to be an effective treatment technology. This technology can convert formaldehyde into non-toxic and harmless water and carbon dioxide at room temperature, and has low energy consumption and environmental friendliness. advantage. Among many catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B01J23/58B01J37/30B01J37/02B01D53/86B01D53/72
CPCB01J23/66B01J23/58B01J37/30B01J37/0201B01D53/8668B01D2257/708B01D2258/06B01J35/23
Inventor 赵学娟花泽林刘灏远刘玲珂卢尓豪李力成
Owner NANJING INST OF TECH
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