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Preparation method and application of neodymium-samarium-doped NiO/MgO composite supported platinum catalyst

A platinum catalyst and composite technology, which is applied in the field of preparation and application of neodymium-samarium-doped NiO/MgO composite-supported platinum catalyst, can solve the problem of high reaction temperature for complete catalytic elimination of benzene series

Active Publication Date: 2020-06-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few studies on the catalytic combustion and elimination of benzene series at home and abroad, and the reaction temperature for complete catalytic elimination of benzene series is relatively high

Method used

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  • Preparation method and application of neodymium-samarium-doped NiO/MgO composite supported platinum catalyst
  • Preparation method and application of neodymium-samarium-doped NiO/MgO composite supported platinum catalyst
  • Preparation method and application of neodymium-samarium-doped NiO/MgO composite supported platinum catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0021] Add 50mL of polyacrylic acid PAA solution with a concentration of 8mg / L to 50mL of D-glucose solution with a concentration of 1.5mol / L, wherein the ratio of D-glucose:PAA is 10mol:2g, and mix well to form a mixed solution. 0.1g of Ni(NO 3 ) 2 ·6H 2 O and 5g specific surface area is 20-40m 2 / g of MgO solid powder is added to the above mixed solution at the same time, where n[Ni(NO 3 ) 2 ]:n[MgO] molar ratio is 0.002:1. Mix well and stir at 5W / cm 2 Ultrasonic at the intensity of ultrasonic for 1 hour, then continue to stir for 24 hours, then evaporate the solvent by rotary evaporation at 80°C to obtain a solid substance, wash it with deionized water until it becomes neutral, then wash it with ethanol, put it in an oven, dry it at 90°C for 12 hours, and put it in the flow Calcined at 700°C for 10h in air. NiO / MgO is obtained.

[0022] Add 50 mL ...

Embodiment 2

[0027] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0028] Add 70mL of polyacrylic acid PAA solution with a concentration of 8mg / L to 80mL of D-glucose solution with a concentration of 1.7mol / L, wherein the ratio of D-glucose:PAA is 13mol:2g, and mix well to form a mixed solution. 0.3g of Ni(NO 3 ) 2 ·6H 2 O and 7g have a specific surface area of ​​20-40m 2 / g of MgO solid powder is added to the above mixed solution at the same time, where n[Ni(NO 3 ) 2 ]:n[MgO] molar ratio is 0.003:1. Mix well and stir at 6W / cm 2 Ultrasound for 1 hour, then continue to stir for 24 hours, then evaporate the solvent by rotary evaporation at 80°C to obtain a solid substance, wash it with deionized water until it is neutral, wash it with ethanol, put it in an oven, dry it at 100°C for 12 hours, and put it in the flow Calcined at 700°C for 10h in air. NiO / MgO is obtained.

[0029] Add 70 mL of 4-vinylbenzoic acid ethanol ...

Embodiment 3

[0034] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0035] Add 90mL of polyacrylic acid PAA solution with a concentration of 8-10mg / L into 90mL of D-glucose solution with a concentration of 1.9mol / L, wherein the ratio of D-glucose:PAA is 14mol:2g, and mix well to form a mixed solution. 0.4g of Ni(NO 3 ) 2 ·6H 2 The specific surface area of ​​O and 9g is 20-40m 2 / g of MgO solid powder is added to the above mixed solution at the same time, where n[Ni(NO 3 ) 2 ]:n[MgO] molar ratio is 0.004:1. Mix well and stir at 8W / cm 2 Ultrasound for 2 hours, then continue to stir for 36 hours, then evaporate the solvent by rotary evaporation at 90°C to obtain a solid substance, wash it with deionized water until neutral, then wash with ethanol, then put it in an oven, dry it at 110°C for 12h, and put it in the flow Calcined at 800°C for 12h in air. NiO / MgO is obtained.

[0036] Add 90 mL of 4-vinylbenzoic acid ethano...

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Abstract

The invention discloses a preparation method and application of a neodymium-samarium-doped NiO / MgO composite supported platinum catalyst. The preparation method of the catalyst comprises the followingsteps: under adjusting effect of a dispersing agent and a surfactant, impregnating magnesium oxide with nickel nitrate to prepare a NiO / MgO composite; subjecting the NiO / MgO, a rare earth compound and mesoporous carbon to blending and rare earth doping; then loading noble metal platinum through a deposition precipitation method and hydrogen reduction to prepare the neodymium-samarium-doped nickel-magnesium composite supported platinum catalyst Pt / Nd-Sm / NiO / MgO with high specific surface area (100-130 m<2> / g) and high thermal stability (higher than 650 DEG C). The catalyst prepared by the preparation method disclosed by the invention has relatively high elimination efficiency on high space velocity (60,000 h<-1> to 100,000 h<-1>), low-concentration benzene (500 ppm to 1,000 ppm) and formaldehyde (50 ppm to 100 ppm). The catalyst prepared by the invention has the advantages of cheap raw materials, simple catalyst preparation process, strong practicability, low temperature for complete elimination of VOCs, high efficiency, no secondary pollution and the like.

Description

technical field [0001] The present invention relates to the preparation of a nickel-magnesium composite oxide-supported platinum Pt / Nd-Sm / NiO / MgO catalyst doped with neodymium and samarium for catalytic combustion to eliminate volatile organic compounds (represented by VOCs, benzene and formaldehyde), And it is used for low-temperature and high-efficiency catalytic combustion to eliminate VOCs. Background technique [0002] Benzene series are one of the main components of VOCs. It usually includes eight compounds such as benzene, toluene, ethylbenzene, and o-xylene, among which benzene series have been listed as priority pollutants in the list of atmospheric toxic pollutants formulated by the US Environmental Protection Agency (USEPA). Benzene series in the air can enter the human body through the respiratory tract, digestive tract and skin, causing various discomforts in the human body, thereby inducing diseases and causing cancer, which has a greater impact on the environ...

Claims

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Application Information

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IPC IPC(8): B01J23/89F23G7/07
CPCB01J23/8946B01J23/002F23G7/07F23G2209/14
Inventor 叶青武润平吴凯陈永宝傅之丹
Owner BEIJING UNIV OF TECH
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