Ternary metal catalyst with excellent chlorine resistance and efficient catalytic oxidation of mixed VOCs

A ternary metal and catalytic oxidation technology, which is applied in the field of catalytic chemistry and nanoscience, can solve the problems of little research on mixed VOCs and supported ternary metal catalysts, and achieve excellent catalytic performance.

Pending Publication Date: 2022-04-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for creating tiny particles called pentaoxymethyl titanium trisilicate or tungsten trioxide that can be used with other materials like ceramics. These small particles are loaded onto special surfaces on which they act well when reacted together under specific conditions such as temperature and pressure. By adding these fine powders into this surface, we have developed new types of catalysis systems that work better than existing ones at lower temperatures.

Problems solved by technology

Technological Problem addressed in this patents relates to reducing environmental damage caused by various types of gases like hydrogen sulfide from exhaust fumes during combustion processes. These gases include formaldehydes, acetone, nitrosocompound, ammonia, cyclohexanes, peroxides, alcohols, vinyl halocaprines, trimellitones, pyridinetochromophorum dyes, polynaphthalenes, naptha molecules, and other small molecule soluble components called heavy metabolites. To address these issues, different techniques were developed including supporting platinum(II)-metalloporphyrne complexes onto specific surfaces, modifying the structure thereof through heteropolymerization, adding transition elements between two atoms within certain atomic positions, creating bridged structures containing tin atom pairs, introducing new functional groups, adjusting basic functions, controlling reactivity, and developing catalys based on highly selective chemistry principles.

Method used

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  • Ternary metal catalyst with excellent chlorine resistance and efficient catalytic oxidation of mixed VOCs
  • Ternary metal catalyst with excellent chlorine resistance and efficient catalytic oxidation of mixed VOCs
  • Ternary metal catalyst with excellent chlorine resistance and efficient catalytic oxidation of mixed VOCs

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Embodiment 1

[0015] Weigh 5.1120mg platinum acetylacetonate, add 2.5mL octadecene, 2.5mL oleylamine, 0.5mL oleic acid, stir and dissolve at room temperature for 20min, then add 49.3164mg ascorbic acid, continue stirring for 5-10min, then weigh 49.2660mg hexacarbonyl Add tungsten and 21.3110 mg triruthenium dodecacarbonyl into the mixed solution to finally form a mixed precursor solution, continue stirring at room temperature for 10-20 minutes, then put it into a reaction kettle, and react in an oven at 200 ° C for 8 hours. After cooling to room temperature, pour the reacted solution into a centrifuge tube, and centrifugally wash with a mixed solution of cyclohexane and ethanol for 3-4 times to obtain PtWRu ternary alloy nanoparticles. The prepared PtWRu ternary alloy nanoparticles were uniformly dispersed in about 10 mL of cyclohexane for storage. Using the adsorption method, a certain amount of r-TiO 2 The carrier was added to the cyclohexane solution containing nanocrystals, stirred for 6-

Embodiment 2

[0018] Weigh 5.1120mg platinum acetylacetonate, add 2.5mL octadecene, 2.5mL oleylamine, 0.5mL oleic acid, stir and dissolve at room temperature for 20min, then add 49.3164mg ascorbic acid, continue stirring for 5-10min, then weigh 49.2660mg hexacarbonyl Tungsten and 22.0060 mg of chromium hexacarbonyl were added to the mixed solution to finally form a mixed precursor solution. Stirring was continued at room temperature for 10-20 minutes, then loaded into a reaction kettle, and reacted in an oven at 200°C for 8 hours. After cooling to room temperature, pour the reacted solution into a centrifuge tube, and centrifugally wash with a mixed solution of cyclohexane and ethanol for 3-4 times to obtain PtWCr ternary alloy nanoparticles. The prepared PtWCr ternary alloy nanoparticles were uniformly dispersed in about 10 mL of cyclohexane for storage. Using the adsorption method, a certain amount of r-TiO 2 The carrier was added to the cyclohexane solution containing nanocrystals, stirred

Embodiment 3

[0021] Weigh 5.1120mg platinum acetylacetonate, add 2.5mL octadecene, 2.5mL oleylamine, 0.5mL oleic acid, stir and dissolve at room temperature for 20min, then add 49.3164mg ascorbic acid, continue stirring for 5-10min, then weigh 49.2660mg hexacarbonyl Add tungsten and 19.49885 mg of manganese decacarbonyl into the mixed solution to finally form a mixed precursor solution, continue stirring at room temperature for 10-20 minutes, then put it into a reaction kettle, and react in an oven at 200 ° C for 8 hours. After cooling to room temperature, pour the reacted solution into a centrifuge tube, and centrifugally wash with a mixed solution of cyclohexane and ethanol for 3-4 times to obtain PtWMn ternary alloy nanoparticles. The prepared PtWMn ternary alloy nanoparticles were uniformly dispersed in about 10 mL of cyclohexane for storage. Using the adsorption method, a certain amount of r-TiO 2 The carrier was added to the cyclohexane solution containing nanocrystals, stirred for 6-1

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Abstract

The invention discloses a ternary metal catalyst with excellent chlorine resistance and efficient catalytic oxidation of mixed VOCs, and belongs to the field of catalytic chemistry and nano science. The preparation method comprises the following steps: firstly, synthesizing ternary metal catalyst nanoparticles by adopting a solvothermal method, then loading the obtained nanoparticles on a TiO2 carrier by adopting an adsorption method, and finally centrifuging, drying and roasting to obtain the PtWM/TiO2 (M = Ru, Cr and Mn) catalyst, thereby finally achieving the excellent chlorine resistance to chlorine-containing VOCs, namely trichloroethylene (TCE) and the efficient catalyst for co-catalytic oxidation of toluene and TCE. The preparation process is simple, and the obtained PtWM/TiO2 (M = Ru, Cr or Mn) catalyst has high acidity, good chlorine resistance and excellent catalytic activity for co-catalytic oxidation reaction of toluene and trichloroethylene.

Description

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Claims

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Application Information

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Owner BEIJING UNIV OF TECH
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