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Composite metal catalyst for online hydrocarbon removal instrument and preparation method thereof

A composite metal and catalyst technology, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low catalytic efficiency of catalysts, and achieve the effect of improving catalytic decomposition efficiency

Active Publication Date: 2020-10-27
上海麦越环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the commonly used method for eliminating hydrocarbons is to heat and catalyze the decomposition of hydrocarbons, but the catalytic efficiency of the catalyst is low

Method used

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  • Composite metal catalyst for online hydrocarbon removal instrument and preparation method thereof
  • Composite metal catalyst for online hydrocarbon removal instrument and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 3.5g template agent, 0.025mol Pd(NO3)2·6H2O and 0.025mol RuCl3·3H2O in 10ml ethylene glycol, and slowly add ethylenediamine solution dropwise to the solution. After mixing uniformly, it is heated by microwave radiation, cooled to room temperature and washed with distilled water to obtain Pdx / Ruy and dried. Put the obtained Pdx / Ruy into a 500mL flask and add 250ml of ethanol, 50ml of purified water, 10g of CTMAB, 5.0g of TEOS, add dropwise ammonia at 45°C and stir for 6 hours, then filter the mixture and wash with water. It was vacuum dried at ℃, and finally calcined in a muffle furnace at 600℃ for 5 hours to obtain PdxRuy / SiO2 nanoparticles. Treat 5.0g PdxRuy / SiO2 nanoparticles, 5.0g MCM-22 and deionized water on a ball mill for 1.5-3 hours to prepare a molecular sieve water slurry. Then, under vacuum, evenly cover the Zeolite surface with the molecular sieve slurry. Finally, it was dried in a vacuum drying oven at 70°C, and then calcined in a muffle furnace a...

Embodiment 2

[0023] Dissolve 3.5g template agent, 0.025mol Pd(NO3)2·6H2O and 0.025mol RuCl3·3H2O in 10ml ethylene glycol, and slowly add ethylenediamine solution dropwise to the solution. After mixing uniformly, it is heated by microwave radiation, cooled to room temperature and washed with distilled water to obtain Pdx / Ruy and dried. Put the obtained Pdx / Ruy into a 500mL flask and add 250ml of ethanol, 50ml of purified water, 10g of CTMAB, 7.5g of TEOS, add dropwise ammonia at 45°C and stir for 6 hours, then filter the mixture, wash with water, It was vacuum dried at ℃, and finally calcined in a muffle furnace at 600℃ for 5 hours to obtain PdxRuy / SiO2 nanoparticles. Treat 5.0g PdxRuy / SiO2 nanoparticles, 5.0g MCM-22 and deionized water on a ball mill for 1.5-3 hours to prepare a molecular sieve water slurry. Then, under vacuum, evenly cover the Zeolite surface with the molecular sieve slurry. Finally, it was dried in a vacuum drying oven at 70°C, and then calcined in a muffle furnace at 5...

Embodiment 3

[0025] Dissolve 3.5g template agent, 0.025mol Pd(NO3)2·6H2O and 0.025mol RuCl3·3H2O in 10ml ethylene glycol, and slowly add ethylenediamine solution dropwise to the solution. After mixing uniformly, it is heated by microwave radiation, cooled to room temperature and washed with distilled water to obtain Pdx / Ruy and dried. Put the obtained Pdx / Ruy into a 500mL flask and add 250ml of ethanol, 50ml of purified water, 10g of CTMAB, 10.0g of TEOS, add dropwise ammonia at 45°C and stir for 6 hours, then filter the mixture and wash with water. Vacuum drying at ℃, and finally calcination in a muffle furnace at 600 ℃ for 5 hours to obtain PdxRuy / SiO2 nanoparticles. Treat 5.0g PdxRuy / SiO2 nanoparticles, 5.0g MCM-22 and deionized water on a ball mill for 1.5-3 hours to prepare molecular sieve water slurry. Then, under vacuum, evenly cover the Zeolite surface with the molecular sieve slurry. Finally, it was dried in a vacuum drying oven at 70°C, and then calcined in a muffle furnace at 5...

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Abstract

The invention provides a composite metal catalyst for an online hydrocarbon removal instrument and a preparation method of the composite metal catalyst. The method is used for solving the technical problem of low catalytic efficiency of hydrocarbon substances of an online hydrocarbon removal instrument in the prior art. The method comprises the following steps of: S1, dissolving a template, Pd(NO3)2.6H2O and RuCl3.3H2O in a solvent I, and adding an alkaline solution to obtain a mixture; performing heating and separating to obtain a solid I; S2, adding the solid I, CTMAB, TEOS and a solvent IIinto a container, adding a precipitant for reaction, performing separation to obtain a solid II, and calcining the solid II to obtain PdxRuy / SiO2 nanoparticles; and S3, treating the PdxRuy / SiO2 nanoparticles, MCM-22 and water to obtain a molecular sieve water slurry, covering the surface of a carrier with the molecular sieve water slurry, performing drying, and conducting calcining to obtain the composite metal catalyst. The technical scheme of the invention is implemented, precious metals Pd and Ru are used as active components and are uniformly mixed with SiO2 and an MCM-22 molecular sieve,finally, the mixture is uniformly coated on the surface of a zeolite carrier to prepare the PdxRuy / SiO2 / MCM-22 / Zeolite composite metal catalyst, so that the catalytic decomposition efficiency of the online hydrocarbon removal instrument is effectively improved.

Description

Technical field [0001] The invention relates to the field of catalysts and hydrocarbon catalysts, in particular to a composite metal catalyst for an online hydrocarbon removal instrument and a preparation method thereof. Background technique [0002] The online hydrocarbon removal instrument can monitor and eliminate hydrocarbons in real time, and is often used in environments where VOCs are prone to leaks, such as chemical plants and oil refineries. In the prior art, a commonly used method for eliminating hydrocarbon substances is to heat and catalytically decompose the hydrocarbon substances, but the catalytic efficiency of the catalyst is low. Therefore, whether there is an efficient catalyst suitable for an on-line hydrocarbon removal instrument is a technical problem that those skilled in the art expect to solve. Summary of the invention [0003] In order to solve the above technical problems, the present invention discloses a composite metal catalyst for online hydrocarbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74
CPCB01J29/7476
Inventor 田文张俊岭赵贤森刘德生王洪朝
Owner 上海麦越环境技术有限公司
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