Catalyst with ruthenium-loaded titanium dioxide hollow spheres embedded with silicon dioxide nanoparticles and preparation method and application of catalyst

A technology of titanium dioxide and silicon dioxide, which is applied in the field of ruthenium-supported titanium dioxide hollow sphere embedded silicon dioxide nanoparticle catalyst and its preparation, can solve the problems of high reaction temperature, hydrogen pressure, complex degradation products, and low utilization rate, and achieve improved Utilization rate, simple preparation method, and high reaction safety performance

Active Publication Date: 2018-01-23
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degradation products of lignin are extremely complex, and it is easy to generate coke, resulting in low utilization rate. So far, the utilization of lignin is mainly concentrated in combustion and heat supply
Catalysts based on the hydrogenation of biomass phenolic compounds have also been extensively studied, but generally require high reaction temperatures (>200°C) and hydrogen pressures (>4MPa)

Method used

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  • Catalyst with ruthenium-loaded titanium dioxide hollow spheres embedded with silicon dioxide nanoparticles and preparation method and application of catalyst
  • Catalyst with ruthenium-loaded titanium dioxide hollow spheres embedded with silicon dioxide nanoparticles and preparation method and application of catalyst
  • Catalyst with ruthenium-loaded titanium dioxide hollow spheres embedded with silicon dioxide nanoparticles and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put 3.5ml of ammonia water (25% concentration), 10ml of deionized water and 58.5ml of absolute ethanol into the container, stir for 30 minutes to obtain a mixed solution, then add 5.6ml of tetraethyl silicate to the mixed solution and continue to stir for 1 hour , and then filtered the solution to obtain a filter cake that was washed three times with water and ethanol, and dried at 60°C for 12 hours to obtain SiO 2 Microspheres; Weigh 0.8 g of SiO obtained 2 The microspheres were dispersed into 97.4 ml absolute ethanol solvent by ultrasonication for 30 minutes to obtain SiO 2For the suspension of microspheres, add 1.0 g cetylamine and 2 ml ammonia water to the suspension and stir for 30 minutes, add 2.2 ml tetraisopropyl titanate to the solution, continue stirring for 2 hours, stop stirring, and age 12 hours, and then filtered, the filter cake was washed three times with deionized water and then dried at 60° C. for 12 hours to obtain solid powder titanium dioxide-coate...

Embodiment 2

[0030] Put 3.5ml of ammonia water (28% concentration), 20ml of deionized water and 80ml of absolute ethanol into the container, stir for 30 minutes to obtain a mixed solution, then add 8.6ml of tetraethyl silicate to the mixed solution and continue to stir for 1 hour. Filter the solution again, and the filter cake obtained is washed three times with water and ethanol respectively, and dried at 80°C for 6 hours to obtain SiO 2 Microspheres; 0.5 g of SiO obtained by weighing 2 The microspheres were dispersed into 97.4 ml absolute ethanol solvent by ultrasonication for 30 minutes to obtain SiO 2 For the suspension of microspheres, add 0.5 g cetylamine and 1 ml ammonia water to the suspension and stir for 30 minutes, add 1.2 ml tetraisopropyl titanate to the solution, continue stirring for 2 hours, stop stirring, and age 12 hours, and then filtered, the filter cake was washed three times with deionized water and then dried at 60° C. for 12 hours to obtain solid powder titanium di...

Embodiment 3

[0032] Put 3.5ml of ammonia water (concentration 28%), 10ml of deionized water and 58.5ml of absolute ethanol into the container, stir for 30 minutes to obtain a mixed solution, then add 3.6ml of tetraethyl silicate to the mixed solution and continue to stir for 1 hour , and then filtered the solution to obtain a filter cake that was washed three times with water and ethanol, and dried at 40°C for 12 hours to obtain SiO 2 Microspheres; Weigh 0.4 g of SiO obtained 2 The microspheres were dispersed into 97.4 ml absolute ethanol solvent by ultrasonication for 30 minutes to obtain SiO 2 For the suspension of microspheres, add 1.0 g cetylamine and 2 ml ammonia water to the suspension and stir for 30 minutes, add 2.2 ml tetraisopropyl titanate to the solution, continue stirring for 2 hours, stop stirring, and age 12 hours, and then filtered, the filter cake was washed three times with deionized water and then dried at 60° C. for 12 hours to obtain solid powder titanium dioxide-coat...

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Abstract

The invention discloses a catalyst with ruthenium-loaded titanium dioxide hollow spheres embedded with silicon dioxide nanoparticles and a preparation method and application of the catalyst. The preparation method includes: using tetraethyl silicate as the raw material to prepare silicon dioxide microspheres; using titanium tetraisopropanolate to wrap the silicon dioxide microspheres with a layerof titanium dioxide and surfactant hexadecylamine, processing the product in an ammonia water solution through a hydrothermal method to partially etch the silicon dioxide microspheres inside so as toform cavities between the shell titanium dioxide and the inside silicon dioxide, and calcining under certain temperature and removing the surfactant to form crystal-form titanium dioxide; using a deposition-precipitation method to load precious metal ruthenium of different content. The catalyst has a special mesoporous spherical structure and large specific surface area and has high conversion rate and selectivity to guaiacol and other biomass phenol hydrogenation. The preparation method is easy to operate, simple in production process, low in equipment requirement and promising in industrialapplication prospect.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a ruthenium-supported titanium dioxide hollow sphere embedded silicon dioxide nanoparticle catalyst and a preparation method and application thereof. Background technique [0002] The problem of energy shortage has long attracted the attention of the world, and it is urgent to find renewable energy to replace it. Biomass is a good substitute and has many advantages. For example, compared with petroleum, biomass is a sustainable energy source, completely non-toxic, absolutely Environmental friendly. In the past few decades, the biomass energy industry such as biomass power generation, fuel ethanol and biodiesel has developed rapidly around the world, and the governments of some countries have also passed legislation to force the production of energy from renewable resources (especially biomass) and chemical production. The U.S. Department of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46C07C29/19C07C35/08
CPCY02P20/52
Inventor 王建国韩冰冰包志康周虎刘天柱
Owner ZHEJIANG UNIV OF TECH
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