PdAg alloy-loaded Ti-SBA-15 catalyst, and preparation method and application thereof

A ti-sba-15, catalyst technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of complex preparation process, and achieve the effect of simple preparation process, small size and high degree of dispersion

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

AI Technical Summary

Problems solved by technology

However, the preparation method of traditional bimetallic catalysts needs to add stabilizers, polymer ligands, etc., and the preparation process is relatively complicated.

Method used

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  • PdAg alloy-loaded Ti-SBA-15 catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Dissolve 8.01g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (molecular formula PEO-PPO-PEO, abbreviated as P123) in 300ml hydrochloric acid solution (concentration 0.1mol) / L), stirring at 40°C for 2h to obtain solution A.

[0030] 2. Add 15 mL of ethyl orthosilicate (TEOS) dropwise to solution A, and then add 115 μL of tetrabutyl titanate (the molar ratio of Si in TEOS to Ti in tetrabutyl titanate is 200), Stir at 40℃ for 24h to obtain suspension B; transfer the above suspension B to the reaction kettle, aging at 80℃ for 24h, and then after suction filtration, washing and drying, roasting at 500℃ for 6h (heating rate 2°C / min), and naturally cooled to room temperature to prepare Ti-SBA-15 carrier.

[0031] 3. Put 0.0049gPd(NO 3 ) 2 , 0.0004gAgNO 3 , 0.5g of Ti-SBA-15 carrier obtained in step S2 was dissolved in 300mL ultrapure water, stirred at room temperature for 4h to obtain suspension C, and then 1178μL NaBH was added to suspension ...

Embodiment 2

[0037] 1. Dissolve 8.01 g of P123 in 300 ml of hydrochloric acid solution (concentration 0.1 mol / L), and stir at 40° C. for 2 hours to obtain solution A.

[0038] 2. Add 15 mL of TEOS dropwise to solution A, and then add a certain amount of tetrabutyl titanate (the molar ratio of Si in TEOS to Ti in tetrabutyl titanate is 200), and stir for 24 hours at 40°C , Get suspension B; transfer the above suspension B to the reactor, aging at 80℃ for 24h, and then after suction filtration, washing, drying, roasting at 500℃ for 6h (heating rate is 2℃ / min ), and naturally cooled to room temperature to prepare Ti-SBA-15 carrier.

[0039] 3. Put 0.0043gPd(NO 3 ) 2 , 0.0008gAgNO 3 , 0.5g of Ti-SBA-15 carrier obtained in step S2 was dissolved in 300mL ultrapure water, stirred at room temperature for 4h to obtain suspension C, and then 1175μL NaBH was added to suspension C 4 Solution (concentration 0.1mol / L), continue to stir for 15 minutes, and then perform suction filtration, washing, and drying ...

Embodiment 3

[0041] 1. Dissolve 8.01 g of P123 in 300 ml of hydrochloric acid solution (concentration 0.1 mol / L), and stir at 40° C. for 2 hours to obtain solution A.

[0042] 2. Add 15mL TEOS dropwise to solution A, and then drop a certain amount of tetrabutyl titanate (the molar ratio of Si in TEOS to Ti in tetrabutyl titanate is 200:1), at 40°C Stir for 24 hours to obtain suspension B; transfer the above suspension B to the reactor, aging at 80°C for 24 hours, and then after suction filtration, washing and drying, roasting at 500°C for 6 hours (heating rate is 2°C) / min), and naturally cooled to room temperature to prepare Ti-SBA-15 carrier.

[0043] 3. Put 0.0032gPd(NO 3 ) 2 , 0.0016gAgNO 3 , 0.5g of Ti-SBA-15 carrier obtained in step S2 was dissolved in 300mL of ultrapure water, stirred at room temperature for 4h to obtain suspension C, and then 1171μL of NaBH was added to suspension C 4 Solution (concentration 0.1mol / L), continue to stir for 15 minutes, and then perform suction filtration...

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Abstract

The invention belongs to the field of environmental catalysis, and discloses a PdAg alloy-loaded Ti-SBA-15 catalyst, and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: dissolving a surfactant P123 in hydrochloric acid, and carryin out stirring at 30-150 DEG C to obtain a solution; dropwise adding tetraethoxysilane and a Ti sourceinto the solution, carrying out stirring at a temperature of 30-150 DEG C, aging an obtained turbid liquid A at a temperature of 40-150 DEG C, performing suction filtration, washing and drying successively, and carrying out roasting at a temperature of 500-550 DEG C to obtain a Ti-SBA-15 carrier; and dissolving a Pd precursor, an Ag precursor and the Ti-SBA-15 carrier into ultrapure water, carrying out stirring at room temperature to obtain turbid liquid B, adding a NaBH4 solution, and carrying out stirring, suction filtration, washing and drying successively to obtain the catalyst. The totalloading amount of Pd and Ag in the catalyst is 0.1-10 wt%, and the catalyst shows very good low ignition temperature, high performance and high stability in the catalytic combustion process of VOCs.

Description

Technical field [0001] The invention belongs to the technical field of environmental catalysis, and specifically relates to a PdAg alloy supported Ti-SBA-15 catalyst and a preparation method and application thereof. Background technique [0002] In recent years, with the rapid development of national industrialization and urbanization, the production of volatile organic compounds (VOCs) has also increased substantially. The release of VOCs has a certain impact on human health and the environment. Some VOCs can induce haze, produce photochemical smog and cause air quality degradation. Generally speaking, VOCs control measures are divided into two parts: recycling and destruction technologies. As one of the VOCs destruction technologies, catalytic combustion has attracted the attention of domestic and foreign scholars due to its efficient catalytic performance and economic feasibility. However, catalysts used for the catalytic combustion of VOCs generally have the disadvantages o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J37/16B01D53/86B01D53/44
CPCB01J29/0325B01J37/16B01D53/8687B01D2257/708
Inventor 温美成宋胜男安太成
Owner GUANGDONG UNIV OF TECH
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