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Preparation method and application of gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst taking hydrotalcite as precursor

A platinum catalyst and hydrotalcite technology are applied in the field of preparation and application of a platinum catalyst supported by a gadolinium-terbium-nickel-magnesium-aluminum composite with hydrotalcite as a precursor, and can solve the problem of high reaction temperature for completely catalyzing elimination of benzene series compounds

Active Publication Date: 2020-05-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst taking hydrotalcite as precursor
  • Preparation method and application of gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst taking hydrotalcite as precursor
  • Preparation method and application of gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst taking hydrotalcite as precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0022] Mg(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O ternary mixed salt dissolved in 50mL deCO 2 A mixed salt solution is formed in deionized water, and the total molar concentration of all ions is n[Mg 2+ +Ni 2+ +Al 3+ ]=0.48mol / L, divalent and trivalent ion molar ratio is n[(Mg 2+ +Ni 2+ )] / n[Al 3+ ]=2. Then 0.5mL adenosine triphosphate (ATP, adenosinetriphosphate, C 10 h 16 N 5 o 13 P 3 ) solution (10mmol / L) was dissolved in the above salt solution to form a mixed solution A, and at 5W / cm 2 The intensity of ultrasonic 1h, and then continue to stir for 2h. In addition, according to the molar ratio, n[KOH]=n[Mg 2+ +Ni 2+ +Al 3+ ] and n[OH - ]: n[CO 3 2- ]=2 Weigh a certain amount of KOH and K 2 CO 3 Dissolve in 50mL deionized water to make mixed alkali solution B. Then put 50mL deCO2 into the three-neck flask ...

Embodiment 2

[0028] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0029] Mg(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O ternary mixed salt was dissolved in 70mL to remove CO 2 A mixed salt solution is formed in deionized water, and the total molar concentration of all ions is n[Mg 2+ +Ni 2+ +Al 3+ ]=0.7mol / L, divalent and trivalent ion molar ratio is n[(Mg 2+ +Ni 2+ )] / n[Al 3+ ]=4. Then 0.7mL adenosine triphosphate (ATP, adenosinetriphosphate, C 10 h 16 N 5 o 13 P 3 ) solution (13mmol / L) was dissolved in the above salt solution to form a mixed solution A, and was ultrasonicated at an intensity of 9W / cm2 for 2h, and then continued to stir for 3h. In addition, according to the molar ratio, n[KOH]=n[Mg 2+ +Ni 2+ +Al 3+ ] and n[OH - ]: n[CO 3 2- ]=2 Weigh a certain amount of KOH and K 2 CO 3 Dissolve in 70mL deionized water to make mixed alkali solution B. Then put 70mL deCO2 into t...

Embodiment 3

[0035] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0036] Mg(NO 3 ) 2 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O ternary mixed salt dissolved in 90mL to remove CO 2 A mixed salt solution is formed in deionized water, and the total molar concentration of all ions is n[Mg 2+ +Ni 2+ +Al 3+ ]=0.8mol / L, divalent and trivalent ion molar ratio is n[(Mg 2+ +Ni 2+ )] / n[Al 3+ ]=5. Then 0.9mL adenosine triphosphate (ATP, adenosinetriphosphate, C 10 h 16 N 5 o 13 P 3 ) solution (18mmol / L) was dissolved in the above salt solution to form a mixed solution A, and at 8W / cm 2 The intensity of ultrasound 2h, and then continue to stir for 5h. In addition, according to the molar ratio, n[KOH]=n[Mg 2+ +Ni 2+ +Al 3+ ] and n[OH - ]: n[CO 3 2- ]=2 Weigh a certain amount of KOH and K 2 CO 3 Dissolve in 90mL deionized water to make mixed alkali solution B. Then put 90mL deCO2 into the three-neck ...

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PUM

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Abstract

The invention discloses a preparation method and application of a gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst taking hydrotalcite as a precursor. The preparationmethod of the catalyst comprises the following steps: preparing a [MgNiAl-NO3]-LDHs hydrotalcite precursor from ternary mixed salts of Mg(NO3)2, Ni(NO3)2 and Al(NO3)3 through a deposition-precipitation method; carrying out anion exchange with hydrotalcite through acetate radical, [Gd(EDTA)]<2-> and [Tb(EDTA)]<2-> to form acetate radical- and gadolinium terbium rare earth-intercalated [Gd-Tb-NiMgAl-Ac]-LDHs hydrotalcite-like compound, and roasting to obtain hydrotalcite-like compound oxide loaded rare earth oxide Gd-Tb / NiMg-AlO. Noble metal platinum is loaded through an impregnation method andNaBH4 reduction to finally obtain the gadolinium-terbium-doped nickel-magnesium-aluminum oxide loaded platinum catalyst Pt / Gd-Tb / NiMg-AlO with high specific surface area and thermal stability. The catalyst prepared in the invention has high elimination efficiency on high-space-velocity and low-concentration toluene and formaldehyde. The catalyst prepared by the invention has the advantages of cheap raw materials, simple catalyst preparation process, strong practicability, complete elimination of volatile organic compounds, low temperature, high efficiency, no secondary pollution and the like.

Description

technical field [0001] The invention relates to the preparation of a gadolinium-terbium-doped nickel-magnesium-aluminum composite supported platinum catalyst Pt / Gd-Tb / NiMg-AlO prepared from a hydrotalcite precursor used for catalytic combustion and elimination of volatile organic compounds (VOCs), and its use Efficient catalytic combustion at low temperature 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 environment and human hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10F23G7/07
CPCB01J23/8946F23G7/07B01J35/61
Inventor 叶青吴凯武润平陈永宝
Owner BEIJING UNIV OF TECH
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