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A kind of preparation method and application of hydrotalcite as precursor gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst

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, which can solve the problem of complete catalytic elimination of benzene series reaction temperature and high temperature, and achieve high and low temperature Catalytic combustion eliminates activity, economical, and low energy consumption

Active Publication Date: 2022-07-19
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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  • A kind of preparation method and application of hydrotalcite as precursor gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst
  • A kind of preparation method and application of hydrotalcite as precursor gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst
  • A kind of preparation method and application of hydrotalcite as precursor gadolinium terbium nickel magnesium aluminum composite supported platinum catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) the preparation method of the 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 was dissolved in 50mL to remove CO 2 A mixed salt solution is formed in deionized water with a total molar concentration of all ions of n[Mg 2+ +Ni 2+ +Al 3+ ]=0.48mol / L, the molar ratio of divalent and trivalent ions is n[(Mg 2+ +Ni 2+ )] / n[Al 3+ ]=2. Then 0.5 mL of adenosine triphosphate (ATP, adenosine triphosphate, 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 50 mL of deionized water to make mixed alkali solution B. Then put 50mL...

Embodiment 2

[0028] (1) the preparation method of the 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 with a total molar concentration of all ions of n[Mg 2+ +Ni 2+ +Al 3+ ]=0.7mol / L, the molar ratio of divalent and trivalent ions is n[(Mg 2+ +Ni 2+ )] / n[Al 3+ ]=4. Then 0.7 mL of adenosine triphosphate (ATP, adenosine triphosphate, C 10 H 16 N 5 O 13 P 3 ) solution (13 mmol / L) was dissolved in the above salt solution to make mixed solution A, and sonicated for 2 h at an intensity of 9 W / cm 2 , and then continued to stir for 3 h. 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...

Embodiment 3

[0035] (1) the preparation method of the 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 was dissolved in 90mL to remove CO 2 A mixed salt solution is formed in deionized water with a total molar concentration of all ions of n[Mg 2+ +Ni 2+ +Al 3+ ]=0.8mol / L, the molar ratio of divalent and trivalent ions is n[(Mg 2+ +Ni 2+ )] / n[Al 3+ ]=5. Then 0.9 mL of adenosine triphosphate (ATP, adenosine triphosphate, 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 sonication was 2h, and the stirring was continued 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 90 mL of deionized water to prepare mixed alkali solution B. Th...

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Abstract

The invention discloses a preparation method and application of a platinum catalyst supported by a gadolinium-terbium-nickel-magnesium-aluminum composite using hydrotalcite as a precursor. The catalyst is based on Mg(NO 3 ) 2 , Ni(NO 3 ) 2 and Al(NO 3 ) 3 Ternary mixed salt was prepared by precipitation method [MgNiAl-NO 3 ]‑LDHs hydrotalcite precursor, then acetate, [Gd(EDTA)] 2‑ and [Tb(EDTA)] 2‑ The anion-exchanged hydrotalcite formed the [Gd‑Tb‑NiMgAl‑Ac]‑LDHs-like hydrotalcite intercalated with acetate and gadolinium-terbium rare earth, and calcined to obtain the hydrotalcite-like oxide supported rare earth oxide Gd‑Tb / NiMg‑AlO. by dipping method and NaBH 4 The precious metal platinum is reduced and supported to finally obtain a high specific surface area and thermal stability of gadolinium terbium doped nickel magnesium aluminum oxide supported platinum catalyst Pt / Gd-Tb / NiMg-AlO. The catalyst prepared by the invention has high elimination efficiency for high space velocity and low concentration of toluene and formaldehyde. The catalyst prepared by the invention has the advantages of cheap raw materials, simple catalyst preparation process, strong practicability, low temperature for completely eliminating volatile organic compounds, 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 to eliminate volatile organic compounds (VOCs), and its use High-efficiency catalytic combustion at low temperature to eliminate VOCs. Background technique [0002] Benzene series is one of the main components of VOCs. It usually includes eight compounds such as benzene, toluene, ethylbenzene, and o-xylene. Among them, benzene series compounds have been listed as priority control pollutants in the list of atmospheric toxic pollutants formulated by the US Environmental Protection Agency (USEPA). Benzenes in the air can enter the human body through the respiratory tract, digestive tract and skin, causing various discomforts to the human body, thereby inducing diseases and causing cancer, which has a greater impact on the environment an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/10F23G7/07
CPCB01J23/8946B01J35/1004F23G7/07
Inventor 叶青吴凯武润平陈永宝
Owner BEIJING UNIV OF TECH
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