High-load metal nickel catalyst as well as preparation method and application thereof

A metal nickel and catalyst technology, applied in the field of catalysis, can solve the problems of affecting the hydrodeoxygenation activity of the catalyst, difficult to prepare a high-loaded metal nickel catalyst, etc., and achieve the effects of overcoming unstable crystal phase, overcoming poor texture, and promoting dispersion.

Inactive Publication Date: 2018-07-13
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the loading of metallic nickel catalyst is an important factor, because it will affect the number and acidity of active nickel sites on the catalyst surface, which in turn affects the hydrodeoxygenation activity of the catalyst. Ni catalysts with a loading of more than 50% are usually used in industrial hydrogenation processes. , however, it is currently difficult to prepare highly loaded and highly dispersed metallic nickel catalysts by simple methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 29.7g Ni(NO 3 ) 2 ·6H 2 O, 23g TiCl 4 - Ethanol (0.3g / g) solution dissolved in 100ml deionized water to form nickel nitrate and TiCl 4 - mixed solution of ethanol;

[0031] (2) 5.2g Na 2 SiO 3 9H 2 O and 18.2 g anhydrous Na 2 CO 3 Dissolve in 100ml deionized water to form Na 2 SiO 3 9H 2 O and Na 2 CO 3 mixed solution;

[0032] (3) The above two mixed solutions were slowly added dropwise to 200ml deionized water at the same time in a water bath at 80°C, and stirred vigorously for 1 hour to form a green precipitate. The pH value of the filtrate obtained after suction filtration is 8-9, and the precipitate is fully washed with deionized water until the filtrate is neutral and the chloride ions in the solution are thoroughly washed away, and the precipitate is added to 200 ml of n-butanol. Evaporate in a water bath at 80°C for 12 hours, then dry in an oven at 120°C for 12 hours to obtain the precursor of the catalyst;

[0033] (4) Place the precursor in...

Embodiment 2

[0035] (1) 29.7g Ni(NO 3 ) 2 ·6H 2 O, 18.1g TiCl 4 - Ethanol (0.3g / g) solution dissolved in 100ml deionized water to form nickel nitrate and TiCl 4 - mixed solution of ethanol;

[0036] (2) 8.1g Na 2 SiO 3 9H 2 O and 15.3 g anhydrous Na 2 CO 3 Dissolve in 100ml deionized water to form Na 2 SiO 3 9H 2 O and Na 2 CO 3 mixed solution;

[0037] (3) The above two solutions were slowly added dropwise to 200ml deionized water at the same time in a water bath at 80°C, and stirred vigorously for 1 hour to form a green precipitate. The pH value of the filtrate obtained after suction filtration is 8-9, and the precipitate is fully washed with deionized water until the filtrate is neutral and the chloride ions in the solution are thoroughly washed away, and the precipitate is added to 200 ml of n-butanol. Evaporate in a water bath at 80°C for 12 hours, then dry in an oven at 120°C for 12 hours to obtain the precursor of the catalyst;

[0038] (4) Place the precursor in a t...

Embodiment 3

[0040] (1) 29.7g Ni(NO 3 ) 2 ·6H 2 O, 13g TiCl 4 - Ethanol (0.3g / g) solution dissolved in 100ml deionized water to form nickel nitrate and TiCl 4 - mixed solution of ethanol;

[0041] (2) 11.4g Na 2 SiO 3 9H 2 O and 11.9 g anhydrous Na 2 CO 3 Dissolve in 100ml deionized water to form Na 2 SiO 3 9H 2 O and Na 2 CO 3 mixed solution;

[0042] (3) The above two solutions were slowly added dropwise to 200ml deionized water at the same time in a water bath at 80°C, and stirred vigorously for 1 hour to form a green precipitate. The pH value of the filtrate obtained after suction filtration is 8-9, and the precipitate is fully washed with deionized water until the filtrate is neutral and the chloride ions in the solution are thoroughly washed away, and the precipitate is added to 200 ml of n-butanol. Evaporate in a water bath at 80°C for 12 hours, then dry in an oven at 120°C for 12 hours to obtain the precursor of the catalyst;

[0043] (4) Place the precursor in a tu...

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Abstract

The invention provides a high-load metal nickel catalyst as well as a preparation method and application thereof. The preparation method is characterized in that Ni(NO3)2.6H2O is subjected to co-precipitation with TiCl4-ethyl alcohol solution and Na2SiO3.9H2O, and water is removed under low surface tension of n-butyl alcohol, thus the high-load metal nickel catalyst which adopts SiO2-TiO2 compoundoxide as a carrier and metal nickel as an active component is prepared; the compound oxide contains TiO2, so that the L acid content is increased; moreover, B acid is generated, and as a result, themutual action between the carrier and the metal component is improved; the surface area of the catalyst is enlarged; the temperature for reduction is reduced; the reduction performance and the dispersing performance of metal nickel are improved; the quantity of active nickel sites on the surface is obviously increased; the reduction nickel particles on the SiO2-TiO2 carrier can be minimized to be4 nm under high load. Therefore, the prepared catalyst is high in low-temperature deoxidization activity, and is high in activity for o-methoxyphenol and high in selectivity to cyclohexane.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a catalyst for catalyzing the selective hydrodeoxygenation of o-methoxyphenol and a preparation method thereof. Background technique [0002] Fossil energy reserves are limited and non-renewable. At the same time, a large amount of greenhouse gases and polluting smoke will be released while consuming fossil energy, which has triggered environmental and ecological crises on a global scale. In order to get rid of the excessive dependence on fossil energy, alternative energy must be sought to alleviate the energy crisis. Biomass energy has become the first choice to replace fossil energy because of its wide range of raw materials, easy availability, and the advantages of being directly converted into liquid fuels. However, due to the complex structure of biomass and the arbitrariness of breaking bonds in the degradation process, there are many kinds of oxygenated comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J37/02B01J37/03B01J37/18C07C1/20C07C13/18
CPCB01J37/03B01J23/755B01J35/006B01J35/0066B01J37/0236B01J37/18C07C1/20C07C2523/755C07C13/18
Inventor 鲁墨弘孙雨吉新李明时
Owner CHANGZHOU UNIV
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