Indium-doped ordered mesoporous alumina supported noble metal catalyst and application thereof

A precious metal catalyst and alumina-supported technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of high industrial cost, complex system, cumbersome process, etc. problems, achieve high catalytic performance, increase specific surface area, and improve catalytic efficiency

Active Publication Date: 2017-11-24
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these catalyst systems use multi-layer beds and multiple catalysts to work together, the system is complicated, the process is cumbersome, and the industrial cost is high.

Method used

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  • Indium-doped ordered mesoporous alumina supported noble metal catalyst and application thereof
  • Indium-doped ordered mesoporous alumina supported noble metal catalyst and application thereof
  • Indium-doped ordered mesoporous alumina supported noble metal catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At room temperature, 1.00 g P123 (EO 20 PO 70 EO 20 , EO=ethylene oxide, PO=propylene oxide) was dissolved in a mixed solution of 15 mL of absolute ethanol and 5 mL of isopropanol, and then about 1.00 mL of concentrated nitric acid was added to the system to adjust the pH value to about 6; Add 0.0764g of indium nitrate and keep stirring for 30 min, then slowly add 2.04g of aluminum isopropoxide under constant stirring, and then vigorously stir at 1000 r / min for 10h. The above solution was aged at 60 °C for 10 h to obtain a sol, and then the solvent was evaporated to dryness, and the obtained xerogel was placed in a muffle furnace, and the temperature was raised to 400 °C at a rate of 0.5 °C / min, and after the heat preservation treatment for 4 h, it was heated at 10 °C Continue to heat up to 800°C at a rate of 1 / min, calcine for 2 hours, and cool down naturally to obtain the carrier. Drop 0.5 wt% Pd solution on the carrier by impregnation method (the dropping amount i...

Embodiment 2

[0030] At room temperature, 1.00 g P123 (EO 20 PO 70 EO 20 , EO=ethylene oxide, PO=propylene oxide) was dissolved in a mixed solution of 15 mL of absolute ethanol and 5 mL of isopropanol, and then about 1.00 mL of concentrated nitric acid was added to the system to adjust the pH value to about 6; Add 0.1528g of indium nitrate and keep stirring for 30 min, then slowly add 2.04g of aluminum isopropoxide under constant stirring, and then vigorously stir at 1000 r / min for 10h. The above solution was aged at 60 °C for 10 h to obtain a sol, and then the solvent was evaporated to dryness, and the obtained xerogel was placed in a muffle furnace, and the temperature was raised to 400 °C at a rate of 0.5 °C / min, and after the heat preservation treatment for 4 h, it was heated at 10 °C Continue to heat up to 800°C at a rate of 1 / min, calcine for 2 hours, and cool down naturally to obtain the carrier. Drop 0.5 wt% Pd solution on the carrier by impregnation method (the dropping amount i...

Embodiment 3

[0032] At room temperature, 1.00 g P123 (EO 20 PO 70 EO 20 , EO=ethylene oxide, PO=propylene oxide) was dissolved in a mixed solution of 15 mL of absolute ethanol and 5 mL of isopropanol, and then about 1.00 mL of concentrated nitric acid was added to the system to adjust the pH value to about 6; Add 0.2292g of indium nitrate and keep stirring for 30 min, then slowly add 2.04g of aluminum isopropoxide under constant stirring, and then vigorously stir at 1000 r / min for 10h. The above solution was aged at 60 °C for 10 h to obtain a sol, and then the solvent was evaporated to dryness, and the obtained xerogel was placed in a muffle furnace and raised to 400 °C at a rate of 0.5 °C / min. Continue to heat up to 800°C at a rate of 1 / min, calcine for 2 hours, and cool down naturally to obtain the carrier. Drop 0.5 wt% Pd solution on the carrier by impregnation method (the dropping amount is calculated by adding 0.005 grams of metal Pd per gram of carrier), put it into a muffle furna...

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Abstract

The invention discloses an indium-doped ordered mesoporous alumina (In-OMA) supported noble metal catalyst and application thereof. Indium-doped ordered mesoporous alumina with oxygen vacancy is synthesized by a sol-gel method taking P123 as a template agent, alcohol as a solvent, nitric acid as an acidity regulator, indium nitrate salt as an indium source and aluminum isopropoxide as an aluminum source; as a carrier, the indium-doped ordered mesoporous alumina is supported with a noble metal to obtain the catalyst. The indium-doped ordered mesoporous alumina carrier obtained by the invention has the characteristics of relatively large specific surface area, uniform-height pore distribution, narrow pore diameter distribution and the like; moreover, the metal indium is dispersed more uniformly, thus the chemical properties of the carrier surface are optimized better and more uniformly, the dispersity of the noble metal, the sintering resistance of the catalyst and the like can be effectively improved, and the catalytic activity of the catalyst in the fields such as nitrogen oxide (NOx) reduction can be remarkably enhanced to gain a broad application prospect.

Description

technical field [0001] The invention belongs to the field of material preparation and application, in particular to an indium-doped ordered mesoporous alumina (In-OMA) supported noble metal catalyst and its application. Background technique [0002] With the increasing environmental problems, people's awareness of environmental protection has gradually increased, and countries have also introduced more and more stringent environmental regulations. Vehicle exhaust is one of the main sources of air pollution, nitrogen oxides (NO x ) and other harmful effects on the environment are well known. Therefore, it is very important to find methods and catalyst systems that can effectively solve the problem of nitrogen oxide pollution in order to cope with increasingly stringent automobile exhaust emission standards. [0003] US 6703343 discloses a kind of dilute NO for using propylene as reducing agent under high temperature conditions x The metal oxide catalyst for exhaust gas tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J23/66B01J35/10B01D53/90B01D53/56
CPCB01D53/8628B01D53/90B01J23/002B01J23/62B01J23/66B01J35/1019B01J35/1042B01J35/1061
Inventor 肖益鸿朱婉璐陈美莲郑勇蔡国辉钟富兰
Owner FUZHOU UNIV
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